linux-kernel - Re: [syzbot] [net?] BUG: Bad page state in skb_pp_cow

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Message-ID: <CAC_iWjL2Ki7NAco-n0t01YRn_TMxnq2Fcx1Ot8fk1fh9XWrWrg@mail.gmail.com>
Date: Wed, 11 Dec 2024 15:41:30 +0200
From: Ilias Apalodimas <ilias.apalodimas@...aro.org>
To: Lorenzo Bianconi <lorenzo@...nel.org>
Cc: syzbot <syzbot+ff145014d6b0ce64a173@...kaller.appspotmail.com>, 
	davem@...emloft.net, edumazet@...gle.com, hawk@...nel.org, horms@...nel.org, 
	kuba@...nel.org, linux-kernel@...r.kernel.org, netdev@...r.kernel.org, 
	pabeni@...hat.com, syzkaller-bugs@...glegroups.com, toke@...hat.com
Subject: Re: [syzbot] [net?] BUG: Bad page state in skb_pp_cow_data

Hi Lorenzo,

On Mon, 9 Dec 2024 at 19:15, Lorenzo Bianconi <lorenzo@...nel.org> wrote:
>
> > Hello,
> >
> > syzbot found the following issue on:
> >
> > HEAD commit:    7503345ac5f5 Merge tag 'block-6.13-20241207' of git://git...
> > git tree:       upstream
> > console+strace: https://syzkaller.appspot.com/x/log.txt?x=1784c820580000
> > kernel config:  https://syzkaller.appspot.com/x/.config?x=335e39020523e2ed
> > dashboard link: https://syzkaller.appspot.com/bug?extid=ff145014d6b0ce64a173
> > compiler:       Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
> > syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=177a8b30580000
> > C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=17d80c0f980000
> >
> > Downloadable assets:
> > disk image: https://storage.googleapis.com/syzbot-assets/21582041bcc6/disk-7503345a.raw.xz
> > vmlinux: https://storage.googleapis.com/syzbot-assets/3752facf1019/vmlinux-7503345a.xz
> > kernel image: https://storage.googleapis.com/syzbot-assets/3b1c3c4d3bd9/bzImage-7503345a.xz
> >
> > The issue was bisected to:
> >
> > commit e6d5dbdd20aa6a86974af51deb9414cd2e7794cb
> > Author: Lorenzo Bianconi <lorenzo@...nel.org>
> > Date:   Mon Feb 12 09:50:56 2024 +0000
> >
> >     xdp: add multi-buff support for xdp running in generic mode
> >
> > bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=129acb30580000
> > final oops:     https://syzkaller.appspot.com/x/report.txt?x=119acb30580000
> > console output: https://syzkaller.appspot.com/x/log.txt?x=169acb30580000
> >
> > IMPORTANT: if you fix the issue, please add the following tag to the commit:
> > Reported-by: syzbot+ff145014d6b0ce64a173@...kaller.appspotmail.com
> > Fixes: e6d5dbdd20aa ("xdp: add multi-buff support for xdp running in generic mode")
> >
> > BUG: Bad page state in process syz-executor285  pfn:2d302
> > page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x2d302
> > flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
> > raw: 00fff00000000000 dead000000000040 ffff888022ab2000 0000000000000000
> > raw: 0000000000000000 0000000000000001 00000000ffffffff 0000000000000000
> > page dumped because: page_pool leak
> > page_owner tracks the page as allocated
> > page last allocated via order 0, migratetype Unmovable, gfp_mask 0x2820(GFP_ATOMIC|__GFP_NOWARN), pid 5820, tgid 5820 (syz-executor285), ts 62999485029, free_ts 54592867285
> >  set_page_owner include/linux/page_owner.h:32 [inline]
> >  post_alloc_hook+0x1f3/0x230 mm/page_alloc.c:1556
> >  prep_new_page mm/page_alloc.c:1564 [inline]
> >  get_page_from_freelist+0x3651/0x37a0 mm/page_alloc.c:3474
> >  __alloc_pages_noprof+0x292/0x710 mm/page_alloc.c:4751
> >  alloc_pages_bulk_noprof+0x70b/0xcc0 mm/page_alloc.c:4699
> >  alloc_pages_bulk_array_node_noprof include/linux/gfp.h:239 [inline]
> >  __page_pool_alloc_pages_slow+0x122/0x690 net/core/page_pool.c:538
> >  page_pool_alloc_netmem net/core/page_pool.c:590 [inline]
> >  page_pool_alloc_pages+0xd0/0x1c0 net/core/page_pool.c:597
> >  page_pool_alloc include/net/page_pool/helpers.h:129 [inline]
> >  page_pool_dev_alloc include/net/page_pool/helpers.h:167 [inline]
> >  skb_pp_cow_data+0xc43/0x1640 net/core/skbuff.c:983
> >  netif_skb_check_for_xdp net/core/dev.c:5041 [inline]
> >  netif_receive_generic_xdp net/core/dev.c:5080 [inline]
> >  do_xdp_generic+0x505/0xd30 net/core/dev.c:5148
> >  __netif_receive_skb_core+0x1ce9/0x4690 net/core/dev.c:5492
> >  __netif_receive_skb_one_core net/core/dev.c:5670 [inline]
> >  __netif_receive_skb+0x12f/0x650 net/core/dev.c:5785
> >  netif_receive_skb_internal net/core/dev.c:5871 [inline]
> >  netif_receive_skb+0x1e8/0x890 net/core/dev.c:5930
> >  tun_rx_batched+0x1b7/0x8f0 drivers/net/tun.c:1550
> >  tun_get_user+0x30d6/0x4890 drivers/net/tun.c:2007
> >  tun_chr_write_iter+0x10d/0x1f0 drivers/net/tun.c:2053
> >  new_sync_write fs/read_write.c:586 [inline]
> >  vfs_write+0xaeb/0xd30 fs/read_write.c:679
> >  ksys_write+0x18f/0x2b0 fs/read_write.c:731
> > page last free pid 5807 tgid 5807 stack trace:
> >  reset_page_owner include/linux/page_owner.h:25 [inline]
> >  free_pages_prepare mm/page_alloc.c:1127 [inline]
> >  free_unref_page+0xde3/0x1130 mm/page_alloc.c:2657
> >  __folio_put+0x2c7/0x440 mm/swap.c:112
> >  pipe_buf_release include/linux/pipe_fs_i.h:219 [inline]
> >  pipe_update_tail fs/pipe.c:224 [inline]
> >  pipe_read+0x6ed/0x13e0 fs/pipe.c:344
> >  new_sync_read fs/read_write.c:484 [inline]
> >  vfs_read+0x991/0xb70 fs/read_write.c:565
> >  ksys_read+0x18f/0x2b0 fs/read_write.c:708
> >  do_syscall_x64 arch/x86/entry/common.c:52 [inline]
> >  do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
> >  entry_SYSCALL_64_after_hwframe+0x77/0x7f
> > Modules linked in:
>
> According to the stack trace above this seems an issue in the page_pool
> codebase since we are trying to get a new page from the page allocator
> (__page_pool_alloc_pages_slow()) but the new page we receive is already
> marked with PP_SIGNATURE in pp_magic field (bad reason is set to "page_pool
> leak" in page_bad_reason()) so it already belongs to the pool.
>
> @Jesper, Ilias: any input on it?

We are indeed trying to allocate a page that wasn't freed using the
page pool APIs here. More specifically, the page got freed without
calling page_pool_return_page() somewhere, which is responsible for
resetting the magic signature.

That's all I can see from the trace now, I'll try having a closer look

Cheers
/Ilias

>
> Regards,
> Lorenzo
>
> > CPU: 0 UID: 0 PID: 5820 Comm: syz-executor285 Not tainted 6.13.0-rc1-syzkaller-00337-g7503345ac5f5 #0
> > Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
> > Call Trace:
> >  <TASK>
> >  __dump_stack lib/dump_stack.c:94 [inline]
> >  dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120
> >  bad_page+0x176/0x1d0 mm/page_alloc.c:501
> >  free_page_is_bad mm/page_alloc.c:923 [inline]
> >  free_pages_prepare mm/page_alloc.c:1119 [inline]
> >  free_unref_page+0x1048/0x1130 mm/page_alloc.c:2657
> >  bpf_xdp_shrink_data net/core/filter.c:4148 [inline]
> >  bpf_xdp_frags_shrink_tail+0x3ee/0x7e0 net/core/filter.c:4169
> >  ____bpf_xdp_adjust_tail net/core/filter.c:4194 [inline]
> >  bpf_xdp_adjust_tail+0x1c3/0x200 net/core/filter.c:4187
> >  bpf_prog_f476d5219b92964a+0x1e/0x20
> >  __bpf_prog_run include/linux/filter.h:701 [inline]
> >  bpf_prog_run_xdp include/net/xdp.h:514 [inline]
> >  bpf_prog_run_generic_xdp+0x686/0x1510 net/core/dev.c:4973
> >  netif_receive_generic_xdp net/core/dev.c:5086 [inline]
> >  do_xdp_generic+0x757/0xd30 net/core/dev.c:5148
> >  __netif_receive_skb_core+0x1ce9/0x4690 net/core/dev.c:5492
> >  __netif_receive_skb_one_core net/core/dev.c:5670 [inline]
> >  __netif_receive_skb+0x12f/0x650 net/core/dev.c:5785
> >  netif_receive_skb_internal net/core/dev.c:5871 [inline]
> >  netif_receive_skb+0x1e8/0x890 net/core/dev.c:5930
> >  tun_rx_batched+0x1b7/0x8f0 drivers/net/tun.c:1550
> >  tun_get_user+0x30d6/0x4890 drivers/net/tun.c:2007
> >  tun_chr_write_iter+0x10d/0x1f0 drivers/net/tun.c:2053
> >  new_sync_write fs/read_write.c:586 [inline]
> >  vfs_write+0xaeb/0xd30 fs/read_write.c:679
> >  ksys_write+0x18f/0x2b0 fs/read_write.c:731
> >  do_syscall_x64 arch/x86/entry/common.c:52 [inline]
> >  do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
> >  entry_SYSCALL_64_after_hwframe+0x77/0x7f
> > RIP: 0033:0x7f941abf7db0
> > Code: 40 00 48 c7 c2 b8 ff ff ff f7 d8 64 89 02 48 c7 c0 ff ff ff ff eb b7 0f 1f 00 80 3d f1 e2 07 00 00 74 17 b8 01 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 58 c3 0f 1f 80 00 00 00 00 48 83 ec 28 48 89
> > RSP: 002b:00007ffc09852f28 EFLAGS: 00000202 ORIG_RAX: 0000000000000001
> > RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f941abf7db0
> > RDX: 0000000000011dc0 RSI: 00000000200004c0 RDI: 00000000000000c8
> > RBP: 0000000000000000 R08: 00007ffc09853058 R09: 00007ffc09853058
> > R10: 00007ffc09853058 R11: 0000000000000202 R12: 00007f941ac460de
> > R13: 0000000000000000 R14: 00007ffc09852f60 R15: 00007ffc09852f50
> >  </TASK>
> > BUG: Bad page state in process syz-executor285  pfn:2d301
> > page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x8 pfn:0x2d301
> > flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
> > raw: 00fff00000000000 dead000000000040 ffff888022ab2000 0000000000000000
> > raw: 0000000000000008 0000000000000001 00000000ffffffff 0000000000000000
> > page dumped because: page_pool leak
> > page_owner tracks the page as allocated
> > page last allocated via order 0, migratetype Unmovable, gfp_mask 0x2820(GFP_ATOMIC|__GFP_NOWARN), pid 5820, tgid 5820 (syz-executor285), ts 62999478821, free_ts 55944947211
> >  set_page_owner include/linux/page_owner.h:32 [inline]
> >  post_alloc_hook+0x1f3/0x230 mm/page_alloc.c:1556
> >  prep_new_page mm/page_alloc.c:1564 [inline]
> >  get_page_from_freelist+0x3651/0x37a0 mm/page_alloc.c:3474
> >  __alloc_pages_noprof+0x292/0x710 mm/page_alloc.c:4751
> >  alloc_pages_bulk_noprof+0x70b/0xcc0 mm/page_alloc.c:4699
> >  alloc_pages_bulk_array_node_noprof include/linux/gfp.h:239 [inline]
> >  __page_pool_alloc_pages_slow+0x122/0x690 net/core/page_pool.c:538
> >  page_pool_alloc_netmem net/core/page_pool.c:590 [inline]
> >  page_pool_alloc_pages+0xd0/0x1c0 net/core/page_pool.c:597
> >  page_pool_alloc include/net/page_pool/helpers.h:129 [inline]
> >  page_pool_dev_alloc include/net/page_pool/helpers.h:167 [inline]
> >  skb_pp_cow_data+0xc43/0x1640 net/core/skbuff.c:983
> >  netif_skb_check_for_xdp net/core/dev.c:5041 [inline]
> >  netif_receive_generic_xdp net/core/dev.c:5080 [inline]
> >  do_xdp_generic+0x505/0xd30 net/core/dev.c:5148
> >  __netif_receive_skb_core+0x1ce9/0x4690 net/core/dev.c:5492
> >  __netif_receive_skb_one_core net/core/dev.c:5670 [inline]
> >  __netif_receive_skb+0x12f/0x650 net/core/dev.c:5785
> >  netif_receive_skb_internal net/core/dev.c:5871 [inline]
> >  netif_receive_skb+0x1e8/0x890 net/core/dev.c:5930
> >  tun_rx_batched+0x1b7/0x8f0 drivers/net/tun.c:1550
> >  tun_get_user+0x30d6/0x4890 drivers/net/tun.c:2007
> >  tun_chr_write_iter+0x10d/0x1f0 drivers/net/tun.c:2053
> >  new_sync_write fs/read_write.c:586 [inline]
> >  vfs_write+0xaeb/0xd30 fs/read_write.c:679
> >  ksys_write+0x18f/0x2b0 fs/read_write.c:731
> > page last free pid 5810 tgid 5810 stack trace:
> >  reset_page_owner include/linux/page_owner.h:25 [inline]
> >  free_pages_prepare mm/page_alloc.c:1127 [inline]
> >  free_unref_page+0xde3/0x1130 mm/page_alloc.c:2657
> >  __folio_put+0x2c7/0x440 mm/swap.c:112
> >  pipe_buf_release include/linux/pipe_fs_i.h:219 [inline]
> >  pipe_update_tail fs/pipe.c:224 [inline]
> >  pipe_read+0x6ed/0x13e0 fs/pipe.c:344
> >  new_sync_read fs/read_write.c:484 [inline]
> >  vfs_read+0x991/0xb70 fs/read_write.c:565
> >  ksys_read+0x18f/0x2b0 fs/read_write.c:708
> >  do_syscall_x64 arch/x86/entry/common.c:52 [inline]
> >  do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
> >  entry_SYSCALL_64_after_hwframe+0x77/0x7f
> > Modules linked in:
> > CPU: 0 UID: 0 PID: 5820 Comm: syz-executor285 Tainted: G    B              6.13.0-rc1-syzkaller-00337-g7503345ac5f5 #0
> > Tainted: [B]=BAD_PAGE
> > Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
> > Call Trace:
> >  <TASK>
> >  __dump_stack lib/dump_stack.c:94 [inline]
> >  dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120
> >  bad_page+0x176/0x1d0 mm/page_alloc.c:501
> >  free_page_is_bad mm/page_alloc.c:923 [inline]
> >  free_pages_prepare mm/page_alloc.c:1119 [inline]
> >  free_unref_page+0x1048/0x1130 mm/page_alloc.c:2657
> >  bpf_xdp_shrink_data net/core/filter.c:4148 [inline]
> >  bpf_xdp_frags_shrink_tail+0x3ee/0x7e0 net/core/filter.c:4169
> >  ____bpf_xdp_adjust_tail net/core/filter.c:4194 [inline]
> >  bpf_xdp_adjust_tail+0x1c3/0x200 net/core/filter.c:4187
> >  bpf_prog_f476d5219b92964a+0x1e/0x20
> >  __bpf_prog_run include/linux/filter.h:701 [inline]
> >  bpf_prog_run_xdp include/net/xdp.h:514 [inline]
> >  bpf_prog_run_generic_xdp+0x686/0x1510 net/core/dev.c:4973
> >  netif_receive_generic_xdp net/core/dev.c:5086 [inline]
> >  do_xdp_generic+0x757/0xd30 net/core/dev.c:5148
> >  __netif_receive_skb_core+0x1ce9/0x4690 net/core/dev.c:5492
> >  __netif_receive_skb_one_core net/core/dev.c:5670 [inline]
> >  __netif_receive_skb+0x12f/0x650 net/core/dev.c:5785
> >  netif_receive_skb_internal net/core/dev.c:5871 [inline]
> >  netif_receive_skb+0x1e8/0x890 net/core/dev.c:5930
> >  tun_rx_batched+0x1b7/0x8f0 drivers/net/tun.c:1550
> >  tun_get_user+0x30d6/0x4890 drivers/net/tun.c:2007
> >  tun_chr_write_iter+0x10d/0x1f0 drivers/net/tun.c:2053
> >  new_sync_write fs/read_write.c:586 [inline]
> >  vfs_write+0xaeb/0xd30 fs/read_write.c:679
> >  ksys_write+0x18f/0x2b0 fs/read_write.c:731
> >  do_syscall_x64 arch/x86/entry/common.c:52 [inline]
> >  do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
> >  entry_SYSCALL_64_after_hwframe+0x77/0x7f
> > RIP: 0033:0x7f941abf7db0
> > Code: 40 00 48 c7 c2 b8 ff ff ff f7 d8 64 89 02 48 c7 c0 ff ff ff ff eb b7 0f 1f 00 80 3d f1 e2 07 00 00 74 17 b8 01 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 58 c3 0f 1f 80 00 00 00 00 48 83 ec 28 48 89
> > RSP: 002b:00007ffc09852f28 EFLAGS: 00000202 ORIG_RAX: 0000000000000001
> > RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f941abf7db0
> > RDX: 0000000000011dc0 RSI: 00000000200004c0 RDI: 00000000000000c8
> > RBP: 0000000000000000 R08: 00007ffc09853058 R09: 00007ffc09853058
> > R10: 00007ffc09853058 R11: 0000000000000202 R12: 00007f941ac460de
> > R13: 0000000000000000 R14: 00007ffc09852f60 R15: 00007ffc09852f50
> >  </TASK>
> > BUG: Bad page state in process syz-executor285  pfn:2d300
> > page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff88802d304000 pfn:0x2d300
> > flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
> > raw: 00fff00000000000 dead000000000040 ffff888022ab2000 0000000000000000
> > raw: ffff88802d304000 0000000000000001 00000000ffffffff 0000000000000000
> > page dumped because: page_pool leak
> > page_owner tracks the page as allocated
> > page last allocated via order 0, migratetype Unmovable, gfp_mask 0x2820(GFP_ATOMIC|__GFP_NOWARN), pid 5820, tgid 5820 (syz-executor285), ts 62999472559, free_ts 55944400344
> >  set_page_owner include/linux/page_owner.h:32 [inline]
> >  post_alloc_hook+0x1f3/0x230 mm/page_alloc.c:1556
> >  prep_new_page mm/page_alloc.c:1564 [inline]
> >  get_page_from_freelist+0x3651/0x37a0 mm/page_alloc.c:3474
> >  __alloc_pages_noprof+0x292/0x710 mm/page_alloc.c:4751
> >  alloc_pages_bulk_noprof+0x70b/0xcc0 mm/page_alloc.c:4699
> >  alloc_pages_bulk_array_node_noprof include/linux/gfp.h:239 [inline]
> >  __page_pool_alloc_pages_slow+0x122/0x690 net/core/page_pool.c:538
> >  page_pool_alloc_netmem net/core/page_pool.c:590 [inline]
> >  page_pool_alloc_pages+0xd0/0x1c0 net/core/page_pool.c:597
> >  page_pool_alloc include/net/page_pool/helpers.h:129 [inline]
> >  page_pool_dev_alloc include/net/page_pool/helpers.h:167 [inline]
> >  skb_pp_cow_data+0xc43/0x1640 net/core/skbuff.c:983
> >  netif_skb_check_for_xdp net/core/dev.c:5041 [inline]
> >  netif_receive_generic_xdp net/core/dev.c:5080 [inline]
> >  do_xdp_generic+0x505/0xd30 net/core/dev.c:5148
> >  __netif_receive_skb_core+0x1ce9/0x4690 net/core/dev.c:5492
> >  __netif_receive_skb_one_core net/core/dev.c:5670 [inline]
> >  __netif_receive_skb+0x12f/0x650 net/core/dev.c:5785
> >  netif_receive_skb_internal net/core/dev.c:5871 [inline]
> >  netif_receive_skb+0x1e8/0x890 net/core/dev.c:5930
> >  tun_rx_batched+0x1b7/0x8f0 drivers/net/tun.c:1550
> >  tun_get_user+0x30d6/0x4890 drivers/net/tun.c:2007
> >  tun_chr_write_iter+0x10d/0x1f0 drivers/net/tun.c:2053
> >  new_sync_write fs/read_write.c:586 [inline]
> >  vfs_write+0xaeb/0xd30 fs/read_write.c:679
> >  ksys_write+0x18f/0x2b0 fs/read_write.c:731
> > page last free pid 5810 tgid 5810 stack trace:
> >  reset_page_owner include/linux/page_owner.h:25 [inline]
> >  free_pages_prepare mm/page_alloc.c:1127 [inline]
> >  free_unref_page+0xde3/0x1130 mm/page_alloc.c:2657
> >  __folio_put+0x2c7/0x440 mm/swap.c:112
> >  pipe_buf_release include/linux/pipe_fs_i.h:219 [inline]
> >  pipe_update_tail fs/pipe.c:224 [inline]
> >  pipe_read+0x6ed/0x13e0 fs/pipe.c:344
> >  new_sync_read fs/read_write.c:484 [inline]
> >  vfs_read+0x991/0xb70 fs/read_write.c:565
> >  ksys_read+0x18f/0x2b0 fs/read_write.c:708
> >  do_syscall_x64 arch/x86/entry/common.c:52 [inline]
> >  do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
> >  entry_SYSCALL_64_after_hwframe+0x77/0x7f
> > Modules linked in:
> > CPU: 0 UID: 0 PID: 5820 Comm: syz-executor285 Tainted: G    B              6.13.0-rc1-syzkaller-00337-g7503345ac5f5 #0
> > Tainted: [B]=BAD_PAGE
> > Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
> > Call Trace:
> >  <TASK>
> >  __dump_stack lib/dump_stack.c:94 [inline]
> >  dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120
> >  bad_page+0x176/0x1d0 mm/page_alloc.c:501
> >  free_page_is_bad mm/page_alloc.c:923 [inline]
> >  free_pages_prepare mm/page_alloc.c:1119 [inline]
> >  free_unref_page+0x1048/0x1130 mm/page_alloc.c:2657
> >  bpf_xdp_shrink_data net/core/filter.c:4148 [inline]
> >  bpf_xdp_frags_shrink_tail+0x3ee/0x7e0 net/core/filter.c:4169
> >  ____bpf_xdp_adjust_tail net/core/filter.c:4194 [inline]
> >  bpf_xdp_adjust_tail+0x1c3/0x200 net/core/filter.c:4187
> >  bpf_prog_f476d5219b92964a+0x1e/0x20
> >  __bpf_prog_run include/linux/filter.h:701 [inline]
> >  bpf_prog_run_xdp include/net/xdp.h:514 [inline]
> >  bpf_prog_run_generic_xdp+0x686/0x1510 net/core/dev.c:4973
> >  netif_receive_generic_xdp net/core/dev.c:5086 [inline]
> >  do_xdp_generic+0x757/0xd30 net/core/dev.c:5148
> >  __netif_receive_skb_core+0x1ce9/0x4690 net/core/dev.c:5492
> >  __netif_receive_skb_one_core net/core/dev.c:5670 [inline]
> >  __netif_receive_skb+0x12f/0x650 net/core/dev.c:5785
> >  netif_receive_skb_internal net/core/dev.c:5871 [inline]
> >  netif_receive_skb+0x1e8/0x890 net/core/dev.c:5930
> >  tun_rx_batched+0x1b7/0x8f0 drivers/net/tun.c:1550
> >  tun_get_user+0x30d6/0x4890 drivers/net/tun.c:2007
> >  tun_chr_write_iter+0x10d/0x1f0 drivers/net/tun.c:2053
> >  new_sync_write fs/read_write.c:586 [inline]
> >  vfs_write+0xaeb/0xd30 fs/read_write.c:679
> >  ksys_write+0x18f/0x2b0 fs/read_write.c:731
> >  do_syscall_x64 arch/x86/entry/common.c:52 [inline]
> >  do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
> >  entry_SYSCALL_64_after_hwframe+0x77/0x7f
> > RIP: 0033:0x7f941abf7db0
> > Code: 40 00 48 c7 c2 b8 ff ff ff f7 d8 64 89 02 48 c7 c0 ff ff ff ff eb b7 0f 1f 00 80 3d f1 e2 07 00 00 74 17 b8 01 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 58 c3 0f 1f 80 00 00 00 00 48 83 ec 28 48 89
> > RSP: 002b:00007ffc09852f28 EFLAGS: 00000202 ORIG_RAX: 0000000000000001
> > RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f941abf7db0
> > RDX: 0000000000011dc0 RSI: 00000000200004c0 RDI: 00000000000000c8
> > RBP: 0000000000000000 R08: 00007ffc09853058 R09: 00007ffc09853058
> > R10: 00007ffc09853058 R11: 0000000000000202 R12: 00007f941ac460de
> > R13: 0000000000000000 R14: 00007ffc09852f60 R15: 00007ffc09852f50
> >  </TASK>
> > BUG: Bad page state in process syz-executor285  pfn:72d3b
> > page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x72d3b
> > flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
> > raw: 00fff00000000000 dead000000000040 ffff888022ab2000 0000000000000000
> > raw: 0000000000000000 0000000000000001 00000000ffffffff 0000000000000000
> > page dumped because: page_pool leak
> > page_owner tracks the page as allocated
> > page last allocated via order 0, migratetype Unmovable, gfp_mask 0x2820(GFP_ATOMIC|__GFP_NOWARN), pid 5820, tgid 5820 (syz-executor285), ts 62999466297, free_ts 54575113729
> >  set_page_owner include/linux/page_owner.h:32 [inline]
> >  post_alloc_hook+0x1f3/0x230 mm/page_alloc.c:1556
> >  prep_new_page mm/page_alloc.c:1564 [inline]
> >  get_page_from_freelist+0x3651/0x37a0 mm/page_alloc.c:3474
> >  __alloc_pages_noprof+0x292/0x710 mm/page_alloc.c:4751
> >  alloc_pages_bulk_noprof+0x70b/0xcc0 mm/page_alloc.c:4699
> >  alloc_pages_bulk_array_node_noprof include/linux/gfp.h:239 [inline]
> >  __page_pool_alloc_pages_slow+0x122/0x690 net/core/page_pool.c:538
> >  page_pool_alloc_netmem net/core/page_pool.c:590 [inline]
> >  page_pool_alloc_pages+0xd0/0x1c0 net/core/page_pool.c:597
> >  page_pool_alloc include/net/page_pool/helpers.h:129 [inline]
> >  page_pool_dev_alloc include/net/page_pool/helpers.h:167 [inline]
> >  skb_pp_cow_data+0xc43/0x1640 net/core/skbuff.c:983
> >  netif_skb_check_for_xdp net/core/dev.c:5041 [inline]
> >  netif_receive_generic_xdp net/core/dev.c:5080 [inline]
> >  do_xdp_generic+0x505/0xd30 net/core/dev.c:5148
> >  __netif_receive_skb_core+0x1ce9/0x4690 net/core/dev.c:5492
> >  __netif_receive_skb_one_core net/core/dev.c:5670 [inline]
> >  __netif_receive_skb+0x12f/0x650 net/core/dev.c:5785
> >  netif_receive_skb_internal net/core/dev.c:5871 [inline]
> >  netif_receive_skb+0x1e8/0x890 net/core/dev.c:5930
> >  tun_rx_batched+0x1b7/0x8f0 drivers/net/tun.c:1550
> >  tun_get_user+0x30d6/0x4890 drivers/net/tun.c:2007
> >  tun_chr_write_iter+0x10d/0x1f0 drivers/net/tun.c:2053
> >  new_sync_write fs/read_write.c:586 [inline]
> >  vfs_write+0xaeb/0xd30 fs/read_write.c:679
> >  ksys_write+0x18f/0x2b0 fs/read_write.c:731
> > page last free pid 5807 tgid 5807 stack trace:
> >  reset_page_owner include/linux/page_owner.h:25 [inline]
> >  free_pages_prepare mm/page_alloc.c:1127 [inline]
> >  free_unref_page+0xde3/0x1130 mm/page_alloc.c:2657
> >  __folio_put+0x2c7/0x440 mm/swap.c:112
> >  pipe_buf_release include/linux/pipe_fs_i.h:219 [inline]
> >  pipe_update_tail fs/pipe.c:224 [inline]
> >  pipe_read+0x6ed/0x13e0 fs/pipe.c:344
> >  new_sync_read fs/read_write.c:484 [inline]
> >  vfs_read+0x991/0xb70 fs/read_write.c:565
> >  ksys_read+0x18f/0x2b0 fs/read_write.c:708
> >  do_syscall_x64 arch/x86/entry/common.c:52 [inline]
> >  do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
> >  entry_SYSCALL_64_after_hwframe+0x77/0x7f
> > Modules linked in:
> > CPU: 0 UID: 0 PID: 5820 Comm: syz-executor285 Tainted: G    B              6.13.0-rc1-syzkaller-00337-g7503345ac5f5 #0
> > Tainted: [B]=BAD_PAGE
> > Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
> > Call Trace:
> >  <TASK>
> >  __dump_stack lib/dump_stack.c:94 [inline]
> >  dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120
> >  bad_page+0x176/0x1d0 mm/page_alloc.c:501
> >  free_page_is_bad mm/page_alloc.c:923 [inline]
> >  free_pages_prepare mm/page_alloc.c:1119 [inline]
> >  free_unref_page+0x1048/0x1130 mm/page_alloc.c:2657
> >  bpf_xdp_shrink_data net/core/filter.c:4148 [inline]
> >  bpf_xdp_frags_shrink_tail+0x3ee/0x7e0 net/core/filter.c:4169
> >  ____bpf_xdp_adjust_tail net/core/filter.c:4194 [inline]
> >  bpf_xdp_adjust_tail+0x1c3/0x200 net/core/filter.c:4187
> >  bpf_prog_f476d5219b92964a+0x1e/0x20
> >  __bpf_prog_run include/linux/filter.h:701 [inline]
> >  bpf_prog_run_xdp include/net/xdp.h:514 [inline]
> >  bpf_prog_run_generic_xdp+0x686/0x1510 net/core/dev.c:4973
> >  netif_receive_generic_xdp net/core/dev.c:5086 [inline]
> >  do_xdp_generic+0x757/0xd30 net/core/dev.c:5148
> >  __netif_receive_skb_core+0x1ce9/0x4690 net/core/dev.c:5492
> >  __netif_receive_skb_one_core net/core/dev.c:5670 [inline]
> >  __netif_receive_skb+0x12f/0x650 net/core/dev.c:5785
> >  netif_receive_skb_internal net/core/dev.c:5871 [inline]
> >  netif_receive_skb+0x1e8/0x890 net/core/dev.c:5930
> >  tun_rx_batched+0x1b7/0x8f0 drivers/net/tun.c:1550
> >  tun_get_user+0x30d6/0x4890 drivers/net/tun.c:2007
> >  tun_chr_write_iter+0x10d/0x1f0 drivers/net/tun.c:2053
> >  new_sync_write fs/read_write.c:586 [inline]
> >  vfs_write+0xaeb/0xd30 fs/read_write.c:679
> >  ksys_write+0x18f/0x2b0 fs/read_write.c:731
> >  do_syscall_x64 arch/x86/entry/common.c:52 [inline]
> >  do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
> >  entry_SYSCALL_64_after_hwframe+0x77/0x7f
> > RIP: 0033:0x7f941abf7db0
> > Code: 40 00 48 c7 c2 b8 ff ff ff f7 d8 64 89 02 48 c7 c0 ff ff ff ff eb b7 0f 1f 00 80 3d f1 e2 07 00 00 74 17 b8 01 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 58 c3 0f 1f 80 00 00 00 00 48 83 ec 28 48 89
> > RSP: 002b:00007ffc09852f28 EFLAGS: 00000202 ORIG_RAX: 0000000000000001
> > RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f941abf7db0
> > RDX: 0000000000011dc0 RSI: 00000000200004c0 RDI: 00000000000000c8
> > RBP: 0000000000000000 R08: 00007ffc09853058 R09: 00007ffc09853058
> > R10: 00007ffc09853058 R11: 0000000000000202 R12: 00007f941ac460de
> > R13: 0000000000000000 R14: 00007ffc09852f60 R15: 00007ffc09852f50
> >  </TASK>
> > BUG: Bad page state in process syz-executor285  pfn:72d3a
> > page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x72d3a
> > flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
> > raw: 00fff00000000000 dead000000000040 ffff888022ab2000 0000000000000000
> > raw: 0000000000000000 0000000000000001 00000000ffffffff 0000000000000000
> > page dumped because: page_pool leak
> > page_owner tracks the page as allocated
> > page last allocated via order 0, migratetype Unmovable, gfp_mask 0x2820(GFP_ATOMIC|__GFP_NOWARN), pid 5820, tgid 5820 (syz-executor285), ts 62999460106, free_ts 54575122306
> >  set_page_owner include/linux/page_owner.h:32 [inline]
> >  post_alloc_hook+0x1f3/0x230 mm/page_alloc.c:1556
> >  prep_new_page mm/page_alloc.c:1564 [inline]
> >  get_page_from_freelist+0x3651/0x37a0 mm/page_alloc.c:3474
> >  __alloc_pages_noprof+0x292/0x710 mm/page_alloc.c:4751
> >  alloc_pages_bulk_noprof+0x70b/0xcc0 mm/page_alloc.c:4699
> >  alloc_pages_bulk_array_node_noprof include/linux/gfp.h:239 [inline]
> >  __page_pool_alloc_pages_slow+0x122/0x690 net/core/page_pool.c:538
> >  page_pool_alloc_netmem net/core/page_pool.c:590 [inline]
> >  page_pool_alloc_pages+0xd0/0x1c0 net/core/page_pool.c:597
> >  page_pool_alloc include/net/page_pool/helpers.h:129 [inline]
> >  page_pool_dev_alloc include/net/page_pool/helpers.h:167 [inline]
> >  skb_pp_cow_data+0xc43/0x1640 net/core/skbuff.c:983
> >  netif_skb_check_for_xdp net/core/dev.c:5041 [inline]
> >  netif_receive_generic_xdp net/core/dev.c:5080 [inline]
> >  do_xdp_generic+0x505/0xd30 net/core/dev.c:5148
> >  __netif_receive_skb_core+0x1ce9/0x4690 net/core/dev.c:5492
> >  __netif_receive_skb_one_core net/core/dev.c:5670 [inline]
> >  __netif_receive_skb+0x12f/0x650 net/core/dev.c:5785
> >  netif_receive_skb_internal net/core/dev.c:5871 [inline]
> >  netif_receive_skb+0x1e8/0x890 net/core/dev.c:5930
> >  tun_rx_batched+0x1b7/0x8f0 drivers/net/tun.c:1550
> >  tun_get_user+0x30d6/0x4890 drivers/net/tun.c:2007
> >  tun_chr_write_iter+0x10d/0x1f0 drivers/net/tun.c:2053
> >  new_sync_write fs/read_write.c:586 [inline]
> >  vfs_write+0xaeb/0xd30 fs/read_write.c:679
> >  ksys_write+0x18f/0x2b0 fs/read_write.c:731
> > page last free pid 5807 tgid 5807 stack trace:
> >  reset_page_owner include/linux/page_owner.h:25 [inline]
> >  free_pages_prepare mm/page_alloc.c:1127 [inline]
> >  free_unref_page+0xde3/0x1130 mm/page_alloc.c:2657
> >  __folio_put+0x2c7/0x440 mm/swap.c:112
> >  pipe_buf_release include/linux/pipe_fs_i.h:219 [inline]
> >  pipe_update_tail fs/pipe.c:224 [inline]
> >  pipe_read+0x6ed/0x13e0 fs/pipe.c:344
> >  new_sync_read fs/read_write.c:484 [inline]
> >  vfs_read+0x991/0xb70 fs/read_write.c:565
> >  ksys_read+0x18f/0x2b0 fs/read_write.c:708
> >  do_syscall_x64 arch/x86/entry/common.c:52 [inline]
> >  do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
> >  entry_SYSCALL_64_after_hwframe+0x77/0x7f
> > Modules linked in:
> > CPU: 0 UID: 0 PID: 5820 Comm: syz-executor285 Tainted: G    B              6.13.0-rc1-syzkaller-00337-g7503345ac5f5 #0
> > Tainted: [B]=BAD_PAGE
> > Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
> > Call Trace:
> >  <TASK>
> >  __dump_stack lib/dump_stack.c:94 [inline]
> >  dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120
> >  bad_page+0x176/0x1d0 mm/page_alloc.c:501
> >  free_page_is_bad mm/page_alloc.c:923 [inline]
> >  free_pages_prepare mm/page_alloc.c:1119 [inline]
> >  free_unref_page+0x1048/0x1130 mm/page_alloc.c:2657
> >  bpf_xdp_shrink_data net/core/filter.c:4148 [inline]
> >  bpf_xdp_frags_shrink_tail+0x3ee/0x7e0 net/core/filter.c:4169
> >  ____bpf_xdp_adjust_tail net/core/filter.c:4194 [inline]
> >  bpf_xdp_adjust_tail+0x1c3/0x200 net/core/filter.c:4187
> >  bpf_prog_f476d5219b92964a+0x1e/0x20
> >  __bpf_prog_run include/linux/filter.h:701 [inline]
> >  bpf_prog_run_xdp include/net/xdp.h:514 [inline]
> >  bpf_prog_run_generic_xdp+0x686/0x1510 net/core/dev.c:4973
> >  netif_receive_generic_xdp net/core/dev.c:5086 [inline]
> >  do_xdp_generic+0x757/0xd30 net/core/dev.c:5148
> >  __netif_receive_skb_core+0x1ce9/0x4690 net/core/dev.c:5492
> >  __netif_receive_skb_one_core net/core/dev.c:5670 [inline]
> >  __netif_receive_skb+0x12f/0x650 net/core/dev.c:5785
> >  netif_receive_skb_internal net/core/dev.c:5871 [inline]
> >  netif_receive_skb+0x1e8/0x890 net/core/dev.c:5930
> >  tun_rx_batched+0x1b7/0x8f0 drivers/net/tun.c:1550
> >  tun_get_user+0x30d6/0x4890 drivers/net/tun.c:2007
> >  tun_chr_write_iter+0x10d/0x1f0 drivers/net/tun.c:2053
> >  new_sync_write fs/read_write.c:586 [inline]
> >  vfs_write+0xaeb/0xd30 fs/read_write.c:679
> >  ksys_write+0x18f/0x2b0 fs/read_write.c:731
> >  do_syscall_x64 arch/x86/entry/common.c:52 [inline]
> >  do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
> >  entry_SYSCALL_64_after_hwframe+0x77/0x7f
> > RIP: 0033:0x7f941abf7db0
> > Code: 40 00 48 c7 c2 b8 ff ff ff f7 d8 64 89 02 48 c7 c0 ff ff ff ff eb b7 0f 1f 00 80 3d f1 e2 07 00 00 74 17 b8 01 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 58 c3 0f 1f 80 00 00 00 00 48 83 ec 28 48 89
> > RSP: 002b:00007ffc09852f28 EFLAGS: 00000202 ORIG_RAX: 0000000000000001
> > RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f941abf7db0
> > RDX: 0000000000011dc0 RSI: 00000000200004c0 RDI: 00000000000000c8
> > RBP: 0000000000000000 R08: 00007ffc09853058 R09: 00007ffc09853058
> > R10: 00007ffc09853058 R11: 0000000000000202 R12: 00007f941ac460de
> > R13: 0000000000000000 R14: 00007ffc09852f60 R15: 00007ffc09852f50
> >  </TASK>
> > BUG: Bad page state in process syz-executor285  pfn:72d39
> > page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x72d39
> > flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
> > raw: 00fff00000000000 dead000000000040 ffff888022ab2000 0000000000000000
> > raw: 0000000000000000 0000000000000001 00000000ffffffff 0000000000000000
> > page dumped because: page_pool leak
> > page_owner tracks the page as allocated
> > page last allocated via order 0, migratetype Unmovable, gfp_mask 0x2820(GFP_ATOMIC|__GFP_NOWARN), pid 5820, tgid 5820 (syz-executor285), ts 62999453972, free_ts 54575963863
> >  set_page_owner include/linux/page_owner.h:32 [inline]
> >  post_alloc_hook+0x1f3/0x230 mm/page_alloc.c:1556
> >  prep_new_page mm/page_alloc.c:1564 [inline]
> >  get_page_from_freelist+0x3651/0x37a0 mm/page_alloc.c:3474
> >  __alloc_pages_noprof+0x292/0x710 mm/page_alloc.c:4751
> >  alloc_pages_bulk_noprof+0x70b/0xcc0 mm/page_alloc.c:4699
> >  alloc_pages_bulk_array_node_noprof include/linux/gfp.h:239 [inline]
> >  __page_pool_alloc_pages_slow+0x122/0x690 net/core/page_pool.c:538
> >  page_pool_alloc_netmem net/core/page_pool.c:590 [inline]
> >  page_pool_alloc_pages+0xd0/0x1c0 net/core/page_pool.c:597
> >  page_pool_alloc include/net/page_pool/helpers.h:129 [inline]
> >  page_pool_dev_alloc include/net/page_pool/helpers.h:167 [inline]
> >  skb_pp_cow_data+0xc43/0x1640 net/core/skbuff.c:983
> >  netif_skb_check_for_xdp net/core/dev.c:5041 [inline]
> >  netif_receive_generic_xdp net/core/dev.c:5080 [inline]
> >  do_xdp_generic+0x505/0xd30 net/core/dev.c:5148
> >  __netif_receive_skb_core+0x1ce9/0x4690 net/core/dev.c:5492
> >  __netif_receive_skb_one_core net/core/dev.c:5670 [inline]
> >  __netif_receive_skb+0x12f/0x650 net/core/dev.c:5785
> >  netif_receive_skb_internal net/core/dev.c:5871 [inline]
> >  netif_receive_skb+0x1e8/0x890 net/core/dev.c:5930
> >  tun_rx_batched+0x1b7/0x8f0 drivers/net/tun.c:1550
> >  tun_get_user+0x30d6/0x4890 drivers/net/tun.c:2007
> >  tun_chr_write_iter+0x10d/0x1f0 drivers/net/tun.c:2053
> >  new_sync_write fs/read_write.c:586 [inline]
> >  vfs_write+0xaeb/0xd30 fs/read_write.c:679
> >  ksys_write+0x18f/0x2b0 fs/read_write.c:731
> > page last free pid 5807 tgid 5807 stack trace:
> >  reset_page_owner include/linux/page_owner.h:25 [inline]
> >  free_pages_prepare mm/page_alloc.c:1127 [inline]
> >  free_unref_page+0xde3/0x1130 mm/page_alloc.c:2657
> >  __folio_put+0x2c7/0x440 mm/swap.c:112
> >  pipe_buf_release include/linux/pipe_fs_i.h:219 [inline]
> >  pipe_update_tail fs/pipe.c:224 [inline]
> >  pipe_read+0x6ed/0x13e0 fs/pipe.c:344
> >  new_sync_read fs/read_write.c:484 [inline]
> >  vfs_read+0x991/0xb70 fs/read_write.c:565
> >  ksys_read+0x18f/0x2b0 fs/read_write.c:708
> >  do_syscall_x64 arch/x86/entry/common.c:52 [inline]
> >  do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
> >  entry_SYSCALL_64_after_hwframe+0x77/0x7f
> > Modules linked in:
> > CPU: 0 UID: 0 PID: 5820 Comm: syz-executor285 Tainted: G    B              6.13.0-rc1-syzkaller-00337-g7503345ac5f5 #0
> > Tainted: [B]=BAD_PAGE
> > Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
> > Call Trace:
> >  <TASK>
> >  __dump_stack lib/dump_stack.c:94 [inline]
> >  dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120
> >  bad_page+0x176/0x1d0 mm/page_alloc.c:501
> >  free_page_is_bad mm/page_alloc.c:923 [inline]
> >  free_pages_prepare mm/page_alloc.c:1119 [inline]
> >  free_unref_page+0x1048/0x1130 mm/page_alloc.c:2657
> >  bpf_xdp_shrink_data net/core/filter.c:4148 [inline]
> >  bpf_xdp_frags_shrink_tail+0x3ee/0x7e0 net/core/filter.c:4169
> >  ____bpf_xdp_adjust_tail net/core/filter.c:4194 [inline]
> >  bpf_xdp_adjust_tail+0x1c3/0x200 net/core/filter.c:4187
> >  bpf_prog_f476d5219b92964a+0x1e/0x20
> >  __bpf_prog_run include/linux/filter.h:701 [inline]
> >  bpf_prog_run_xdp include/net/xdp.h:514 [inline]
> >  bpf_prog_run_generic_xdp+0x686/0x1510 net/core/dev.c:4973
> >  netif_receive_generic_xdp net/core/dev.c:5086 [inline]
> >  do_xdp_generic+0x757/0xd30 net/core/dev.c:5148
> >  __netif_receive_skb_core+0x1ce9/0x4690 net/core/dev.c:5492
> >  __netif_receive_skb_one_core net/core/dev.c:5670 [inline]
> >  __netif_receive_skb+0x12f/0x650 net/core/dev.c:5785
> >  netif_receive_skb_internal net/core/dev.c:5871 [inline]
> >  netif_receive_skb+0x1e8/0x890 net/core/dev.c:5930
> >  tun_rx_batched+0x1b7/0x8f0 drivers/net/tun.c:1550
> >  tun_get_user+0x30d6/0x4890 drivers/net/tun.c:2007
> >  tun_chr_write_iter+0x10d/0x1f0 drivers/net/tun.c:2053
> >  new_sync_write fs/read_write.c:586 [inline]
> >  vfs_write+0xaeb/0xd30 fs/read_write.c:679
> >  ksys_write+0x18f/0x2b0 fs/read_write.c:731
> >  do_syscall_x64 arch/x86/entry/common.c:52 [inline]
> >  do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
> >  entry_SYSCALL_64_after_hwframe+0x77/0x7f
> > RIP: 0033:0x7f941abf7db0
> > Code: 40 00 48 c7 c2 b8 ff ff ff f7 d8 64 89 02 48 c7 c0 ff ff ff ff eb b7 0f 1f 00 80 3d f1 e2 07 00 00 74 17 b8 01 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 58 c3 0f 1f 80 00 00 00 00 48 83 ec 28 48 89
> > RSP: 002b:00007ffc09852f28 EFLAGS: 00000202 ORIG_RAX: 0000000000000001
> > RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f941abf7db0
> > RDX: 0000000000011dc0 RSI: 00000000200004c0 RDI: 00000000000000c8
> > RBP: 0000000000000000 R08: 00007ffc09853058 R09: 00007ffc09853058
> > R10: 00007ffc09853058 R11: 0000000000000202 R12: 00007f941ac460de
> > R13: 0000000000000000 R14: 00007ffc09852f60 R15: 00007ffc09852f50
> >  </TASK>
> > BUG: Bad page state in process syz-executor285  pfn:72d38
> > page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x72d38
> > flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
> > raw: 00fff00000000000 dead000000000040 ffff888022ab2000 0000000000000000
> > raw: 0000000000000000 0000000000000001 00000000ffffffff 0000000000000000
> > page dumped because: page_pool leak
> > page_owner tracks the page as allocated
> > page last allocated via order 0, migratetype Unmovable, gfp_mask 0x2820(GFP_ATOMIC|__GFP_NOWARN), pid 5820, tgid 5820 (syz-executor285), ts 62999447572, free_ts 54575218247
> >  set_page_owner include/linux/page_owner.h:32 [inline]
> >  post_alloc_hook+0x1f3/0x230 mm/page_alloc.c:1556
> >  prep_new_page mm/page_alloc.c:1564 [inline]
> >  get_page_from_freelist+0x3651/0x37a0 mm/page_alloc.c:3474
> >  __alloc_pages_noprof+0x292/0x710 mm/page_alloc.c:4751
> >  alloc_pages_bulk_noprof+0x70b/0xcc0 mm/page_alloc.c:4699
> >  alloc_pages_bulk_array_node_noprof include/linux/gfp.h:239 [inline]
> >  __page_pool_alloc_pages_slow+0x122/0x690 net/core/page_pool.c:538
> >  page_pool_alloc_netmem net/core/page_pool.c:590 [inline]
> >  page_pool_alloc_pages+0xd0/0x1c0 net/core/page_pool.c:597
> >  page_pool_alloc include/net/page_pool/helpers.h:129 [inline]
> >  page_pool_dev_alloc include/net/page_pool/helpers.h:167 [inline]
> >  skb_pp_cow_data+0xc43/0x1640 net/core/skbuff.c:983
> >  netif_skb_check_for_xdp net/core/dev.c:5041 [inline]
> >  netif_receive_generic_xdp net/core/dev.c:5080 [inline]
> >  do_xdp_generic+0x505/0xd30 net/core/dev.c:5148
> >  __netif_receive_skb_core+0x1ce9/0x4690 net/core/dev.c:5492
> >  __netif_receive_skb_one_core net/core/dev.c:5670 [inline]
> >  __netif_receive_skb+0x12f/0x650 net/core/dev.c:5785
> >  netif_receive_skb_internal net/core/dev.c:5871 [inline]
> >  netif_receive_skb+0x1e8/0x890 net/core/dev.c:5930
> >  tun_rx_batched+0x1b7/0x8f0 drivers/net/tun.c:1550
> >  tun_get_user+0x30d6/0x4890 drivers/net/tun.c:2007
> >  tun_chr_write_iter+0x10d/0x1f0 drivers/net/tun.c:2053
> >  new_sync_write fs/read_write.c:586 [inline]
> >  vfs_write+0xaeb/0xd30 fs/read_write.c:679
> >  ksys_write+0x18f/0x2b0 fs/read_write.c:731
> > page last free pid 5807 tgid 5807 stack trace:
> >  reset_page_owner include/linux/page_owner.h:25 [inline]
> >  free_pages_prepare mm/page_alloc.c:1127 [inline]
> >  free_unref_page+0xde3/0x1130 mm/page_alloc.c:2657
> >  __folio_put+0x2c7/0x440 mm/swap.c:112
> >  pipe_buf_release include/linux/pipe_fs_i.h:219 [inline]
> >  pipe_update_tail fs/pipe.c:224 [inline]
> >  pipe_read+0x6ed/0x13e0 fs/pipe.c:344
> >  new_sync_read fs/read_write.c:484 [inline]
> >  vfs_read+0x991/0xb70 fs/read_write.c:565
> >  ksys_read+0x18f/0x2b0 fs/read_write.c:708
> >  do_syscall_x64 arch/x86/entry/common.c:52 [inline]
> >  do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
> >  entry_SYSCALL_64_after_hwframe+0x77/0x7f
> > Modules linked in:
> > CPU: 0 UID: 0 PID: 5820 Comm: syz-executor285 Tainted: G    B              6.13.0-rc1-syzkaller-00337-g7503345ac5f5 #0
> > Tainted: [B]=BAD_PAGE
> > Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
> > Call Trace:
> >  <TASK>
> >  __dump_stack lib/dump_stack.c:94 [inline]
> >  dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120
> >  bad_page+0x176/0x1d0 mm/page_alloc.c:501
> >  free_page_is_bad mm/page_alloc.c:923 [inline]
> >  free_pages_prepare mm/page_alloc.c:1119 [inline]
> >  free_unref_page+0x1048/0x1130 mm/page_alloc.c:2657
> >  bpf_xdp_shrink_data net/core/filter.c:4148 [inline]
> >  bpf_xdp_frags_shrink_tail+0x3ee/0x7e0 net/core/filter.c:4169
> >  ____bpf_xdp_adjust_tail net/core/filter.c:4194 [inline]
> >  bpf_xdp_adjust_tail+0x1c3/0x200 net/core/filter.c:4187
> >  bpf_prog_f476d5219b92964a+0x1e/0x20
> >  __bpf_prog_run include/linux/filter.h:701 [inline]
> >  bpf_prog_run_xdp include/net/xdp.h:514 [inline]
> >  bpf_prog_run_generic_xdp+0x686/0x1510 net/core/dev.c:4973
> >  netif_receive_generic_xdp net/core/dev.c:5086 [inline]
> >  do_xdp_generic+0x757/0xd30 net/core/dev.c:5148
> >  __netif_receive_skb_core+0x1ce9/0x4690 net/core/dev.c:5492
> >  __netif_receive_skb_one_core net/core/dev.c:5670 [inline]
> >  __netif_receive_skb+0x12f/0x650 net/core/dev.c:5785
> >  netif_receive_skb_internal net/core/dev.c:5871 [inline]
> >  netif_receive_skb+0x1e8/0x890 net/core/dev.c:5930
> >  tun_rx_batched+0x1b7/0x8f0 drivers/net/tun.c:1550
> >  tun_get_user+0x30d6/0x4890 drivers/net/tun.c:2007
> >  tun_chr_write_iter+0x10d/0x1f0 drivers/net/tun.c:2053
> >  new_sync_write fs/read_write.c:586 [inline]
> >  vfs_write+0xaeb/0xd30 fs/read_write.c:679
> >  ksys_write+0x18f/0x2b0 fs/read_write.c:731
> >  do_syscall_x64 arch/x86/entry/common.c:52 [inline]
> >  do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
> >  entry_SYSCALL_64_after_hwframe+0x77/0x7f
> > RIP: 0033:0x7f941abf7db0
> > Code: 40 00 48 c7 c2 b8 ff ff ff f7 d8 64 89 02 48 c7 c0 ff ff ff ff eb b7 0f 1f 00 80 3d f1 e2 07 00 00 74 17 b8 01 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 58 c3 0f 1f 80 00 00 00 00 48 83 ec 28 48 89
> > RSP: 002b:00007ffc09852f28 EFLAGS: 00000202 ORIG_RAX: 0000000000000001
> > RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f941abf7db0
> > RDX: 0000000000011dc0 RSI: 00000000200004c0 RDI: 00000000000000c8
> > RBP: 0000000000000000 R08: 00007ffc09853058 R09: 00007ffc09853058
> > R10: 00007ffc09853058 R11: 0000000000000202 R12: 00007f941ac460de
> > R13: 0000000000000000 R14: 00007ffc09852f60 R15: 00007ffc09852f50
> >  </TASK>
> > BUG: Bad page state in process syz-executor285  pfn:76907
> > page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x76907
> > flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
> > raw: 00fff00000000000 dead000000000040 ffff888022ab2000 0000000000000000
> > raw: 0000000000000000 0000000000000001 00000000ffffffff 0000000000000000
> > page dumped because: page_pool leak
> > page_owner tracks the page as allocated
> > page last allocated via order 0, migratetype Unmovable, gfp_mask 0x2820(GFP_ATOMIC|__GFP_NOWARN), pid 5820, tgid 5820 (syz-executor285), ts 62999441200, free_ts 54582364655
> >  set_page_owner include/linux/page_owner.h:32 [inline]
> >  post_alloc_hook+0x1f3/0x230 mm/page_alloc.c:1556
> >  prep_new_page mm/page_alloc.c:1564 [inline]
> >  get_page_from_freelist+0x3651/0x37a0 mm/page_alloc.c:3474
> >  __alloc_pages_noprof+0x292/0x710 mm/page_alloc.c:4751
> >  alloc_pages_bulk_noprof+0x70b/0xcc0 mm/page_alloc.c:4699
> >  alloc_pages_bulk_array_node_noprof include/linux/gfp.h:239 [inline]
> >  __page_pool_alloc_pages_slow+0x122/0x690 net/core/page_pool.c:538
> >  page_pool_alloc_netmem net/core/page_pool.c:590 [inline]
> >  page_pool_alloc_pages+0xd0/0x1c0 net/core/page_pool.c:597
> >  page_pool_alloc include/net/page_pool/helpers.h:129 [inline]
> >  page_pool_dev_alloc include/net/page_pool/helpers.h:167 [inline]
> >  skb_pp_cow_data+0xc43/0x1640 net/core/skbuff.c:983
> >  netif_skb_check_for_xdp net/core/dev.c:5041 [inline]
> >  netif_receive_generic_xdp net/core/dev.c:5080 [inline]
> >  do_xdp_generic+0x505/0xd30 net/core/dev.c:5148
> >  __netif_receive_skb_core+0x1ce9/0x4690 net/core/dev.c:5492
> >  __netif_receive_skb_one_core net/core/dev.c:5670 [inline]
> >  __netif_receive_skb+0x12f/0x650 net/core/dev.c:5785
> >  netif_receive_skb_internal net/core/dev.c:5871 [inline]
> >  netif_receive_skb+0x1e8/0x890 net/core/dev.c:5930
> >  tun_rx_batched+0x1b7/0x8f0 drivers/net/tun.c:1550
> >  tun_get_user+0x30d6/0x4890 drivers/net/tun.c:2007
> >  tun_chr_write_iter+0x10d/0x1f0 drivers/net/tun.c:2053
> >  new_sync_write fs/read_write.c:586 [inline]
> >  vfs_write+0xaeb/0xd30 fs/read_write.c:679
> >  ksys_write+0x18f/0x2b0 fs/read_write.c:731
> > page last free pid 5807 tgid 5807 stack trace:
> >  reset_page_owner include/linux/page_owner.h:25 [inline]
> >  free_pages_prepare mm/page_alloc.c:1127 [inline]
> >  free_unref_page+0xde3/0x1130 mm/page_alloc.c:2657
> >  __folio_put+0x2c7/0x440 mm/swap.c:112
> >  pipe_buf_release include/linux/pipe_fs_i.h:219 [inline]
> >  pipe_update_tail fs/pipe.c:224 [inline]
> >  pipe_read+0x6ed/0x13e0 fs/pipe.c:344
> >  new_sync_read fs/read_write.c:484 [inline]
> >  vfs_read+0x991/0xb70 fs/read_write.c:565
> >  ksys_read+0x18f/0x2b0 fs/read_write.c:708
> >  do_syscall_x64 arch/x86/entry/common.c:52 [inline]
> >  do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
> >  entry_SYSCALL_64_after_hwframe+0x77/0x7f
> > Modules linked in:
> > CPU: 0 UID: 0 PID: 5820 Comm: syz-executor285 Tainted: G    B              6.13.0-rc1-syzkaller-00337-g7503345ac5f5 #0
> > Tainted: [B]=BAD_PAGE
> > Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
> > Call Trace:
> >  <TASK>
> >  __dump_stack lib/dump_stack.c:94 [inline]
> >  dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120
> >  bad_page+0x176/0x1d0 mm/page_alloc.c:501
> >  free_page_is_bad mm/page_alloc.c:923 [inline]
> >  free_pages_prepare mm/page_alloc.c:1119 [inline]
> >  free_unref_page+0x1048/0x1130 mm/page_alloc.c:2657
> >  bpf_xdp_shrink_data net/core/filter.c:4148 [inline]
> >  bpf_xdp_frags_shrink_tail+0x3ee/0x7e0 net/core/filter.c:4169
> >  ____bpf_xdp_adjust_tail net/core/filter.c:4194 [inline]
> >  bpf_xdp_adjust_tail+0x1c3/0x200 net/core/filter.c:4187
> >  bpf_prog_f476d5219b92964a+0x1e/0x20
> >  __bpf_prog_run include/linux/filter.h:701 [inline]
> >  bpf_prog_run_xdp include/net/xdp.h:514 [inline]
> >  bpf_prog_run_generic_xdp+0x686/0x1510 net/core/dev.c:4973
> >  netif_receive_generic_xdp net/core/dev.c:5086 [inline]
> >  do_xdp_generic+0x757/0xd30 net/core/dev.c:5148
> >  __netif_receive_skb_core+0x1ce9/0x4690 net/core/dev.c:5492
> >  __netif_receive_skb_one_core net/core/dev.c:5670 [inline]
> >  __netif_receive_skb+0x12f/0x650 net/core/dev.c:5785
> >  netif_receive_skb_internal net/core/dev.c:5871 [inline]
> >  netif_receive_skb+0x1e8/0x890 net/core/dev.c:5930
> >  tun_rx_batched+0x1b7/0x8f0 drivers/net/tun.c:1550
> >  tun_get_user+0x30d6/0x4890 drivers/net/tun.c:2007
> >  tun_chr_write_iter+0x10d/0x1f0 drivers/net/tun.c:2053
> >  new_sync_write fs/read_write.c:586 [inline]
> >  vfs_write+0xaeb/0xd30 fs/read_write.c:679
> >  ksys_write+0x18f/0x2b0 fs/read_write.c:731
> >  do_syscall_x64 arch/x86/entry/common.c:52 [inline]
> >  do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
> >  entry_SYSCALL_64_after_hwframe+0x77/0x7f
> > RIP: 0033:0x7f941abf7db0
> > Code: 40 00 48 c7 c2 b8 ff ff ff f7 d8 64 89 02 48 c7 c0 ff ff ff ff eb b7 0f 1f 00 80 3d f1 e2 07 00 00 74 17 b8 01 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 58 c3 0f 1f 80 00 00 00 00 48 83 ec 28 48 89
> > RSP: 002b:00007ffc09852f28 EFLAGS: 00000202 ORIG_RAX: 0000000000000001
> > RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f941abf7db0
> > RDX: 0000000000011dc0 RSI: 00000000200004c0 RDI: 00000000000000c8
> > RBP: 0000000000000000 R08: 00007ffc09853058 R09: 00007ffc09853058
> > R10: 00007ffc09853058 R11: 0000000000000202 R12: 00007f941ac460de
> > R13: 0000000000000000 R14: 00007ffc09852f60 R15: 00007ffc09852f50
> >  </TASK>
> > BUG: Bad page state in process syz-executor285  pfn:76906
> > page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x76906
> > flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
> > raw: 00fff00000000000 dead000000000040 ffff888022ab2000 0000000000000000
> > raw: 0000000000000000 0000000000000001 00000000ffffffff 0000000000000000
> > page dumped because: page_pool leak
> > page_owner tracks the page as allocated
> > page last allocated via order 0, migratetype Unmovable, gfp_mask 0x2820(GFP_ATOMIC|__GFP_NOWARN), pid 5820, tgid 5820 (syz-executor285), ts 62999421067, free_ts 54582851254
> >  set_page_owner include/linux/page_owner.h:32 [inline]
> >  post_alloc_hook+0x1f3/0x230 mm/page_alloc.c:1556
> >  prep_new_page mm/page_alloc.c:1564 [inline]
> >  get_page_from_freelist+0x3651/0x37a0 mm/page_alloc.c:3474
> >  __alloc_pages_noprof+0x292/0x710 mm/page_alloc.c:4751
> >  alloc_pages_bulk_noprof+0x70b/0xcc0 mm/page_alloc.c:4699
> >  alloc_pages_bulk_array_node_noprof include/linux/gfp.h:239 [inline]
> >  __page_pool_alloc_pages_slow+0x122/0x690 net/core/page_pool.c:538
> >  page_pool_alloc_netmem net/core/page_pool.c:590 [inline]
> >  page_pool_alloc_pages+0xd0/0x1c0 net/core/page_pool.c:597
> >  page_pool_alloc include/net/page_pool/helpers.h:129 [inline]
> >  page_pool_dev_alloc include/net/page_pool/helpers.h:167 [inline]
> >  skb_pp_cow_data+0xc43/0x1640 net/core/skbuff.c:983
> >  netif_skb_check_for_xdp net/core/dev.c:5041 [inline]
> >  netif_receive_generic_xdp net/core/dev.c:5080 [inline]
> >  do_xdp_generic+0x505/0xd30 net/core/dev.c:5148
> >  __netif_receive_skb_core+0x1ce9/0x4690 net/core/dev.c:5492
> >  __netif_receive_skb_one_core net/core/dev.c:5670 [inline]
> >  __netif_receive_skb+0x12f/0x650 net/core/dev.c:5785
> >  netif_receive_skb_internal net/core/dev.c:5871 [inline]
> >  netif_receive_skb+0x1e8/0x890 net/core/dev.c:5930
> >  tun_rx_batched+0x1b7/0x8f0 drivers/net/tun.c:1550
> >  tun_get_user+0x30d6/0x4890 drivers/net/tun.c:2007
> >  tun_chr_write_iter+0x10d/0x1f0 drivers/net/tun.c:2053
> >  new_sync_write fs/read_write.c:586 [inline]
> >  vfs_write+0xaeb/0xd30 fs/read_write.c:679
> >  ksys_write+0x18f/0x2b0 fs/read_write.c:731
> > page last free pid 5807 tgid 5807 stack trace:
> >  reset_page_owner include/linux/page_owner.h:25 [inline]
> >  free_pages_prepare mm/page_alloc.c:1127 [inline]
> >  free_unref_page+0xde3/0x1130 mm/page_alloc.c:2657
> >  __folio_put+0x2c7/0x440 mm/swap.c:112
> >  pipe_buf_release include/linux/pipe_fs_i.h:219 [inline]
> >  pipe_update_tail fs/pipe.c:224 [inline]
> >  pipe_read+0x6ed/0x13e0 fs/pipe.c:344
> >  new_sync_read fs/read_write.c:484 [inline]
> >  vfs_read+0x991/0xb70 fs/read_write.c:565
> >  ksys_read+0x18f/0x2b0 fs/read_write.c:708
> >  do_syscall_x64 arch/x86/entry/common.c:52 [inline]
> >  do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
> >  entry_SYSCALL_64_after_hwframe+0x77/0x7f
> > Modules linked in:
> > CPU: 0 UID: 0 PID: 5820 Comm: syz-executor285 Tainted: G    B              6.13.0-rc1-syzkaller-00337-g7503345ac5f5 #0
> > Tainted: [B]=BAD_PAGE
> > Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
> > Call Trace:
> >  <TASK>
> >  __dump_stack lib/dump_stack.c:94 [inline]
> >  dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120
> >  bad_page+0x176/0x1d0 mm/page_alloc.c:501
> >  free_page_is_bad mm/page_alloc.c:923 [inline]
> >  free_pages_prepare mm/page_alloc.c:1119 [inline]
> >  free_unref_page+0x1048/0x1130 mm/page_alloc.c:2657
> >  bpf_xdp_shrink_data net/core/filter.c:4148 [inline]
> >  bpf_xdp_frags_shrink_tail+0x3ee/0x7e0 net/core/filter.c:4169
> >  ____bpf_xdp_adjust_tail net/core/filter.c:4194 [inline]
> >  bpf_xdp_adjust_tail+0x1c3/0x200 net/core/filter.c:4187
> >  bpf_prog_f476d5219b92964a+0x1e/0x20
> >  __bpf_prog_run include/linux/filter.h:701 [inline]
> >  bpf_prog_run_xdp include/net/xdp.h:514 [inline]
> >  bpf_prog_run_generic_xdp+0x686/0x1510 net/core/dev.c:4973
> >  netif_receive_generic_xdp net/core/dev.c:5086 [inline]
> >  do_xdp_generic+0x757/0xd30 net/core/dev.c:5148
> >  __netif_receive_skb_core+0x1ce9/0x4690 net/core/dev.c:5492
> >  __netif_receive_skb_one_core net/core/dev.c:5670 [inline]
> >  __netif_receive_skb+0x12f/0x650 net/core/dev.c:5785
> >  netif_receive_skb_internal net/core/dev.c:5871 [inline]
> >  netif_receive_skb+0x1e8/0x890 net/core/dev.c:5930
> >  tun_rx_batched+0x1b7/0x8f0 drivers/net/tun.c:1550
> >  tun_get_user+0x30d6/0x4890 drivers/net/tun.c:2007
> >  tun_chr_write_iter+0x10d/0x1f0 drivers/net/tun.c:2053
> >  new_sync_write fs/read_write.c:586 [inline]
> >  vfs_write+0xaeb/0xd30 fs/read_write.c:679
> >  ksys_write+0x18f/0x2b0 fs/read_write.c:731
> >  do_syscall_x64 arch/x86/entry/common.c:52 [inline]
> >  do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
> >  entry_SYSCALL_64_after_hwframe+0x77/0x7f
> > RIP: 0033:0x7f941abf7db0
> > Code: 40 00 48 c7 c2 b8 ff ff ff f7 d8 64 89 02 48 c7 c0 ff ff ff ff eb b7 0f 1f 00 80 3d f1 e2 07 00 00 74 17 b8 01 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 58 c3 0f 1f 80 00 00 00 00 48 83 ec 28 48 89
> > RSP: 002b:00007ffc09852f28 EFLAGS: 00000202 ORIG_RAX: 0000000000000001
> > RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f941abf7db0
> > RDX: 0000000000011dc0 RSI: 00000000200004c0 RDI: 00000000000000c8
> > RBP: 0000000000000000 R08: 00007ffc09853058 R09: 00007ffc09853058
> > R10: 00007ffc09853058 R11: 0000000000000202 R12: 00007f941ac460de
> > R13: 0000000000000000 R14: 00007ffc09852f60 R15: 00007ffc09852f50
> >  </TASK>
> > BUG: Bad page state in process syz-executor285  pfn:76905
> > page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x76905
> > flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
> > raw: 00fff00000000000 dead000000000040 ffff888022ab2000 0000000000000000
> > raw: 0000000000000000 0000000000000001 00000000ffffffff 0000000000000000
> > page dumped because: page_pool leak
> > page_owner tracks the page as allocated
> > page last allocated via order 0, migratetype Unmovable, gfp_mask 0x2820(GFP_ATOMIC|__GFP_NOWARN), pid 5820, tgid 5820 (syz-executor285), ts 62999414838, free_ts 54582871367
> >  set_page_owner include/linux/page_owner.h:32 [inline]
> >  post_alloc_hook+0x1f3/0x230 mm/page_alloc.c:1556
> >  prep_new_page mm/page_alloc.c:1564 [inline]
> >  get_page_from_freelist+0x3651/0x37a0 mm/page_alloc.c:3474
> >  __alloc_pages_noprof+0x292/0x710 mm/page_alloc.c:4751
> >  alloc_pages_bulk_noprof+0x70b/0xcc0 mm/page_alloc.c:4699
> >  alloc_pages_bulk_array_node_noprof include/linux/gfp.h:239 [inline]
> >  __page_pool_alloc_pages_slow+0x122/0x690 net/core/page_pool.c:538
> >  page_pool_alloc_netmem net/core/page_pool.c:590 [inline]
> >  page_pool_alloc_pages+0xd0/0x1c0 net/core/page_pool.c:597
> >  page_pool_alloc include/net/page_pool/helpers.h:129 [inline]
> >  page_pool_dev_alloc include/net/page_pool/helpers.h:167 [inline]
> >  skb_pp_cow_data+0xc43/0x1640 net/core/skbuff.c:983
> >  netif_skb_check_for_xdp net/core/dev.c:5041 [inline]
> >  netif_receive_generic_xdp net/core/dev.c:5080 [inline]
> >  do_xdp_generic+0x505/0xd30 net/core/dev.c:5148
> >  __netif_receive_skb_core+0x1ce9/0x4690 net/core/dev.c:5492
> >  __netif_receive_skb_one_core net/core/dev.c:5670 [inline]
> >  __netif_receive_skb+0x12f/0x650 net/core/dev.c:5785
> >  netif_receive_skb_internal net/core/dev.c:5871 [inline]
> >  netif_receive_skb+0x1e8/0x890 net/core/dev.c:5930
> >  tun_rx_batched+0x1b7/0x8f0 drivers/net/tun.c:1550
> >  tun_get_user+0x30d6/0x4890 drivers/net/tun.c:2007
> >  tun_chr_write_iter+0x10d/0x1f0 drivers/net/tun.c:2053
> >  new_sync_write fs/read_write.c:586 [inline]
> >  vfs_write+0xaeb/0xd30 fs/read_write.c:679
> >  ksys_write+0x18f/0x2b0 fs/read_write.c:731
> > page last free pid 5807 tgid 5807 stack trace:
> >  reset_page_owner include/linux/page_owner.h:25 [inline]
> >  free_pages_prepare mm/page_alloc.c:1127 [inline]
> >  free_unref_page+0xde3/0x1130 mm/page_alloc.c:2657
> >  __folio_put+0x2c7/0x440 mm/swap.c:112
> >  pipe_buf_release include/linux/pipe_fs_i.h:219 [inline]
> >  pipe_update_tail fs/pipe.c:224 [inline]
> >  pipe_read+0x6ed/0x13e0 fs/pipe.c:344
> >  new_sync_read fs/read_write.c:484 [inline]
> >  vfs_read+0x991/0xb70 fs/read_write.c:565
> >  ksys_read+0x18f/0x2b0 fs/read_write.c:708
> >  do_syscall_x64 arch/x86/entry/common.c:52 [inline]
> >  do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
> >  entry_SYSCALL_64_after_hwframe+0x77/0x7f
> > Modules linked in:
> > CPU: 0 UID: 0 PID: 5820 Comm: syz-executor285 Tainted: G    B              6.13.0-rc1-syzkaller-00337-g7503345ac5f5 #0
> > Tainted: [B]=BAD_PAGE
> > Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
> > Call Trace:
> >  <TASK>
> >  __dump_stack lib/dump_stack.c:94 [inline]
> >  dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120
> >  bad_page+0x176/0x1d0 mm/page_alloc.c:501
> >  free_page_is_bad mm/page_alloc.c:923 [inline]
> >  free_pages_prepare mm/page_alloc.c:1119 [inline]
> >  free_unref_page+0x1048/0x1130 mm/page_alloc.c:2657
> >  bpf_xdp_shrink_data net/core/filter.c:4148 [inline]
> >  bpf_xdp_frags_shrink_tail+0x3ee/0x7e0 net/core/filter.c:4169
> >  ____bpf_xdp_adjust_tail net/core/filter.c:4194 [inline]
> >  bpf_xdp_adjust_tail+0x1c3/0x200 net/core/filter.c:4187
> >  bpf_prog_f476d5219b92964a+0x1e/0x20
> >  __bpf_prog_run include/linux/filter.h:701 [inline]
> >  bpf_prog_run_xdp include/net/xdp.h:514 [inline]
> >  bpf_prog_run_generic_xdp+0x686/0x1510 net/core/dev.c:4973
> >  netif_receive_generic_xdp net/core/dev.c:5086 [inline]
> >  do_xdp_generic+0x757/0xd30 net/core/dev.c:5148
> >  __netif_receive_skb_core+0x1ce9/0x4690 net/core/dev.c:5492
> >  __netif_receive_skb_one_core net/core/dev.c:5670 [inline]
> >  __netif_receive_skb+0x12f/0x650 net/core/dev.c:5785
> >  netif_receive_skb_internal net/core/dev.c:5871 [inline]
> >  netif_receive_skb+0x1e8/0x890 net/core/dev.c:5930
> >  tun_rx_batched+0x1b7/0x8f0 drivers/net/tun.c:1550
> >  tun_get_user+0x30d6/0x4890 drivers/net/tun.c:2007
> >  tun_chr_write_iter+0x10d/0x1f0 drivers/net/tun.c:2053
> >  new_sync_write fs/read_write.c:586 [inline]
> >  vfs_write+0xaeb/0xd30 fs/read_write.c:679
> >  ksys_write+0x18f/0x2b0 fs/read_write.c:731
> >  do_syscall_x64 arch/x86/entry/common.c:52 [inline]
> >  do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
> >  entry_SYSCALL_64_after_hwframe+0x77/0x7f
> > RIP: 0033:0x7f941abf7db0
> > Code: 40 00 48 c7 c2 b8 ff ff ff f7 d8 64 89 02 48 c7 c0 ff ff ff ff eb b7 0f 1f 00 80 3d f1 e2 07 00 00 74 17 b8 01 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 58 c3 0f 1f 80 00 00 00 00 48 83 ec 28 48 89
> > RSP: 002b:00007ffc09852f28 EFLAGS: 00000202 ORIG_RAX: 0000000000000001
> > RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f941abf7db0
> > RDX: 0000000000011dc0 RSI: 00000000200004c0 RDI: 00000000000000c8
> > RBP: 0000000000000000 R08: 00007ffc09853058 R09: 00007ffc09853058
> > R10: 00007ffc09853058 R11: 0000000000000202 R12: 00007f941ac460de
> > R13: 0000000000000000 R14: 00007ffc09852f60 R15: 00007ffc09852f50
> >  </TASK>
> > BUG: Bad page state in process syz-executor285  pfn:76904
> > page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x76904
> > flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
> > raw: 00fff00000000000 dead000000000040 ffff888022ab2000 0000000000000000
> > raw: 0000000000000000 0000000000000001 00000000ffffffff 0000000000000000
> > page dumped because: page_pool leak
> > page_owner tracks the page as allocated
> > page last allocated via order 0, migratetype Unmovable, gfp_mask 0x2820(GFP_ATOMIC|__GFP_NOWARN), pid 5820, tgid 5820 (syz-executor285), ts 62999408239, free_ts 54582895841
> >  set_page_owner include/linux/page_owner.h:32 [inline]
> >  post_alloc_hook+0x1f3/0x230 mm/page_alloc.c:1556
> >  prep_new_page mm/page_alloc.c:1564 [inline]
> >  get_page_from_freelist+0x3651/0x37a0 mm/page_alloc.c:3474
> >  __alloc_pages_noprof+0x292/0x710 mm/page_alloc.c:4751
> >  alloc_pages_bulk_noprof+0x70b/0xcc0 mm/page_alloc.c:4699
> >  alloc_pages_bulk_array_node_noprof include/linux/gfp.h:239 [inline]
> >  __page_pool_alloc_pages_slow+0x122/0x690 net/core/page_pool.c:538
> >  page_pool_alloc_netmem net/core/page_pool.c:590 [inline]
> >  page_pool_alloc_pages+0xd0/0x1c0 net/core/page_pool.c:597
> >  page_pool_alloc include/net/page_pool/helpers.h:129 [inline]
> >  page_pool_dev_alloc include/net/page_pool/helpers.h:167 [inline]
> >  skb_pp_cow_data+0xc43/0x1640 net/core/skbuff.c:983
> >  netif_skb_check_for_xdp net/core/dev.c:5041 [inline]
> >  netif_receive_generic_xdp net/core/dev.c:5080 [inline]
> >  do_xdp_generic+0x505/0xd30 net/core/dev.c:5148
> >  __netif_receive_skb_core+0x1ce9/0x4690 net/core/dev.c:5492
> >  __netif_receive_skb_one_core net/core/dev.c:5670 [inline]
> >  __netif_receive_skb+0x12f/0x650 net/core/dev.c:5785
> >  netif_receive_skb_internal net/core/dev.c:5871 [inline]
> >  netif_receive_skb+0x1e8/0x890 net/core/dev.c:5930
> >  tun_rx_batched+0x1b7/0x8f0 drivers/net/tun.c:1550
> >  tun_get_user+0x30d6/0x4890 drivers/net/tun.c:2007
> >  tun_chr_write_iter+0x10d/0x1f0 drivers/net/tun.c:2053
> >  new_sync_write fs/read_write.c:586 [inline]
> >  vfs_write+0xaeb/0xd30 fs/read_write.c:679
> >  ksys_write+0x18f/0x2b0 fs/read_write.c:731
> > page last free pid 5807 tgid 5807 stack trace:
> >  reset_page_owner include/linux/page_owner.h:25 [inline]
> >  free_pages_prepare mm/page_alloc.c:1127 [inline]
> >  free_unref_page+0xde3/0x1130 mm/page_alloc.c:2657
> >  __folio_put+0x2c7/0x440 mm/swap.c:112
> >  pipe_buf_release include/linux/pipe_fs_i.h:219 [inline]
> >  pipe_update_tail fs/pipe.c:224 [inline]
> >  pipe_read+0x6ed/0x13e0 fs/pipe.c:344
> >  new_sync_read fs/read_write.c:484 [inline]
> >  vfs_read+0x991/0xb70 fs/read_write.c:565
> >  ksys_read+0x18f/0x2b0 fs/read_write.c:708
> >  do_syscall_x64 arch/x86/entry/common.c:52 [inline]
> >  do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
> >  entry_SYSCALL_64_after_hwframe+0x77/0x7f
> > Modules linked in:
> > CPU: 0 UID: 0 PID: 5820 Comm: syz-executor285 Tainted: G    B              6.13.0-rc1-syzkaller-00337-g7503345ac5f5 #0
> > Tainted: [B]=BAD_PAGE
> > Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
> > Call Trace:
> >  <TASK>
> >  __dump_stack lib/dump_stack.c:94 [inline]
> >  dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120
> >  bad_page+0x176/0x1d0 mm/page_alloc.c:501
> >  free_page_is_bad mm/page_alloc.c:923 [inline]
> >  free_pages_prepare mm/page_alloc.c:1119 [inline]
> >  free_unref_page+0x1048/0x1130 mm/page_alloc.c:2657
> >  bpf_xdp_shrink_data net/core/filter.c:4148 [inline]
> >  bpf_xdp_frags_shrink_tail+0x3ee/0x7e0 net/core/filter.c:4169
> >  ____bpf_xdp_adjust_tail net/core/filter.c:4194 [inline]
> >  bpf_xdp_adjust_tail+0x1c3/0x200 net/core/filter.c:4187
> >  bpf_prog_f476d5219b92964a+0x1e/0x20
> >  __bpf_prog_run include/linux/filter.h:701 [inline]
> >  bpf_prog_run_xdp include/net/xdp.h:514 [inline]
> >  bpf_prog_run_generic_xdp+0x686/0x1510 net/core/dev.c:4973
> >  netif_receive_generic_xdp net/core/dev.c:5086 [inline]
> >  do_xdp_generic+0x757/0xd30 net/core/dev.c:5148
> >  __netif_receive_skb_core+0x1ce9/0x4690 net/core/dev.c:5492
> >  __netif_receive_skb_one_core net/core/dev.c:5670 [inline]
> >  __netif_receive_skb+0x12f/0x650 net/core/dev.c:5785
> >  netif_receive_skb_internal net/core/dev.c:5871 [inline]
> >  netif_receive_skb+0x1e8/0x890 net/core/dev.c:5930
> >  tun_rx_batched+0x1b7/0x8f0 drivers/net/tun.c:1550
> >  tun_get_user+0x30d6/0x4890 drivers/net/tun.c:2007
> >  tun_chr_write_iter+0x10d/0x1f0 drivers/net/tun.c:2053
> >  new_sync_write fs/read_write.c:586 [inline]
> >  vfs_write+0xaeb/0xd30 fs/read_write.c:679
> >  ksys_write+0x18f/0x2b0 fs/read_write.c:731
> >  do_syscall_x64 arch/x86/entry/common.c:52 [inline]
> >  do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
> >  entry_SYSCALL_64_after_hwframe+0x77/0x7f
> > RIP: 0033:0x7f941abf7db0
> > Code: 40 00 48 c7 c2 b8 ff ff ff f7 d8 64 89 02 48 c7 c0 ff ff ff ff eb b7 0f 1f 00 80 3d f1 e2 07 00 00 74 17 b8 01 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 58 c3 0f 1f 80 00 00 00 00 48 83 ec 28 48 89
> > RSP: 002b:00007ffc09852f28 EFLAGS: 00000202 ORIG_RAX: 0000000000000001
> > RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f941abf7db0
> > RDX: 0000000000011dc0 RSI: 00000000200004c0 RDI: 00000000000000c8
> > RBP: 0000000000000000 R08: 00007ffc09853058 R09: 00007ffc09853058
> > R10: 00007ffc09853058 R11: 0000000000000202 R12: 00007f941ac460de
> > R13: 0000000000000000 R14: 00007ffc09852f60 R15: 00007ffc09852f50
> >  </TASK>
> >
> >
> > ---
> > This report is generated by a bot. It may contain errors.
> > See https://goo.gl/tpsmEJ for more information about syzbot.
> > syzbot engineers can be reached at syzkaller@...glegroups.com.
> >
> > syzbot will keep track of this issue. See:
> > https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
> > For information about bisection process see: https://goo.gl/tpsmEJ#bisection
> >
> > If the report is already addressed, let syzbot know by replying with:
> > #syz fix: exact-commit-title
> >
> > If you want syzbot to run the reproducer, reply with:
> > #syz test: git://repo/address.git branch-or-commit-hash
> > If you attach or paste a git patch, syzbot will apply it before testing.
> >
> > If you want to overwrite report's subsystems, reply with:
> > #syz set subsystems: new-subsystem
> > (See the list of subsystem names on the web dashboard)
> >
> > If the report is a duplicate of another one, reply with:
> > #syz dup: exact-subject-of-another-report
> >
> > If you want to undo deduplication, reply with:
> > #syz undup