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Message-ID: <6782e97a.050a0220.d0267.004b.GAE@google.com> Date: Sat, 11 Jan 2025 13:58:18 -0800 From: syzbot <syzbot+6f691675b0810bf591ec@...kaller.appspotmail.com> To: akpm@...ux-foundation.org, asmadeus@...ewreck.org, ericvh@...nel.org, linux-kernel@...r.kernel.org, linux-mm@...ck.org, lucho@...kov.net, syzkaller-bugs@...glegroups.com, v9fs@...ts.linux.dev Subject: [syzbot] [v9fs?] BUG: stack guard page was hit in io_wq_worker Hello, syzbot found the following issue on: HEAD commit: fbfd64d25c7a Merge tag 'vfs-6.13-rc7.fixes' of git://git.k.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=101a0ef8580000 kernel config: https://syzkaller.appspot.com/x/.config?x=7bdfbaac3fbb90d6 dashboard link: https://syzkaller.appspot.com/bug?extid=6f691675b0810bf591ec compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=12e33edf980000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=11520dc4580000 Downloadable assets: disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/7feb34a89c2a/non_bootable_disk-fbfd64d2.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/106ee8380ff0/vmlinux-fbfd64d2.xz kernel image: https://storage.googleapis.com/syzbot-assets/09437c87aa26/bzImage-fbfd64d2.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+6f691675b0810bf591ec@...kaller.appspotmail.com BUG: TASK stack guard page was hit at ffffc900034d7ff8 (stack is ffffc900034d8000..ffffc900034e0000) Oops: stack guard page: 0000 [#1] PREEMPT SMP KASAN NOPTI CPU: 2 UID: 0 PID: 5942 Comm: iou-wrk-5940 Not tainted 6.13.0-rc6-syzkaller-00036-gfbfd64d25c7a #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 RIP: 0010:kasan_check_range+0x19/0x1a0 mm/kasan/generic.c:188 Code: 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 66 0f 1f 00 48 85 f6 0f 84 50 01 00 00 48 89 f8 41 54 44 0f b6 c2 48 01 f0 <55> 53 0f 82 c6 00 00 00 48 b8 ff ff ff ff ff 7f ff ff 48 39 f8 0f RSP: 0018:ffffc900034d8000 EFLAGS: 00010082 RAX: ffffffff96e51cc8 RBX: 0000000000000021 RCX: ffffffff8175d18e RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff96e51cc0 RBP: ffffc900034d8158 R08: 0000000000000000 R09: 0000000000000000 R10: ffffffff96e51daf R11: 000000000009dbe3 R12: ffff888025064880 R13: 0000000000000200 R14: 0000000000000009 R15: 1ffff9200069b00a FS: 000055556e7a2380(0000) GS:ffff88806a800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffc900034d7ff8 CR3: 00000000208ec000 CR4: 0000000000352ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <#DF> </#DF> <TASK> instrument_atomic_read include/linux/instrumented.h:68 [inline] _test_bit include/asm-generic/bitops/instrumented-non-atomic.h:141 [inline] hlock_class+0x4e/0x130 kernel/locking/lockdep.c:228 mark_lock+0xb5/0xc60 kernel/locking/lockdep.c:4727 mark_usage kernel/locking/lockdep.c:4670 [inline] __lock_acquire+0x9f1/0x3c40 kernel/locking/lockdep.c:5180 lock_acquire.part.0+0x11b/0x380 kernel/locking/lockdep.c:5849 rcu_lock_acquire include/linux/rcupdate.h:337 [inline] rcu_read_lock include/linux/rcupdate.h:849 [inline] page_ext_get+0x3a/0x310 mm/page_ext.c:525 __set_page_owner+0x96/0x560 mm/page_owner.c:322 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x2d1/0x350 mm/page_alloc.c:1558 prep_new_page mm/page_alloc.c:1566 [inline] get_page_from_freelist+0xfce/0x2f80 mm/page_alloc.c:3476 __alloc_pages_noprof+0x223/0x25b0 mm/page_alloc.c:4753 alloc_pages_mpol_noprof+0x2c9/0x610 mm/mempolicy.c:2269 alloc_slab_page mm/slub.c:2423 [inline] allocate_slab mm/slub.c:2589 [inline] new_slab+0x2c9/0x410 mm/slub.c:2642 ___slab_alloc+0xd7d/0x17a0 mm/slub.c:3830 __slab_alloc.constprop.0+0x56/0xb0 mm/slub.c:3920 __slab_alloc_node mm/slub.c:3995 [inline] slab_alloc_node mm/slub.c:4156 [inline] __do_kmalloc_node mm/slub.c:4297 [inline] __kmalloc_noprof+0x2ec/0x510 mm/slub.c:4310 kmalloc_noprof include/linux/slab.h:905 [inline] p9_fcall_init+0x97/0x260 net/9p/client.c:233 p9_tag_alloc+0x21c/0x870 net/9p/client.c:300 p9_client_prepare_req+0x19f/0x4d0 net/9p/client.c:644 p9_client_rpc+0x1c3/0xc10 net/9p/client.c:691 p9_client_flush.isra.0+0x1ff/0x420 net/9p/client.c:609 p9_client_zc_rpc.constprop.0+0x7d2/0x880 net/9p/client.c:826 p9_client_read_once+0x443/0x820 net/9p/client.c:1570 p9_client_read+0x13f/0x1b0 net/9p/client.c:1534 v9fs_issue_read+0x115/0x340 fs/9p/vfs_addr.c:76 netfs_retry_read_subrequests fs/netfs/read_retry.c:62 [inline] netfs_retry_reads+0x1508/0x1d40 fs/netfs/read_retry.c:234 netfs_rreq_assess+0x5d3/0x870 fs/netfs/read_collect.c:374 netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:409 netfs_retry_reads+0x159a/0x1d40 fs/netfs/read_retry.c:237 netfs_rreq_assess+0x5d3/0x870 fs/netfs/read_collect.c:374 netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:409 netfs_retry_reads+0x159a/0x1d40 fs/netfs/read_retry.c:237 netfs_rreq_assess+0x5d3/0x870 fs/netfs/read_collect.c:374 netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:409 netfs_retry_reads+0x159a/0x1d40 fs/netfs/read_retry.c:237 netfs_rreq_assess+0x5d3/0x870 fs/netfs/read_collect.c:374 netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:409 netfs_retry_reads+0x159a/0x1d40 fs/netfs/read_retry.c:237 netfs_rreq_assess+0x5d3/0x870 fs/netfs/read_collect.c:374 netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:409 netfs_retry_reads+0x159a/0x1d40 fs/netfs/read_retry.c:237 netfs_rreq_assess+0x5d3/0x870 fs/netfs/read_collect.c:374 netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:409 netfs_retry_reads+0x159a/0x1d40 fs/netfs/read_retry.c:237 netfs_rreq_assess+0x5d3/0x870 fs/netfs/read_collect.c:374 netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:409 netfs_retry_reads+0x159a/0x1d40 fs/netfs/read_retry.c:237 netfs_rreq_assess+0x5d3/0x870 fs/netfs/read_collect.c:374 netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:409 netfs_retry_reads+0x159a/0x1d40 fs/netfs/read_retry.c:237 netfs_rreq_assess+0x5d3/0x870 fs/netfs/read_collect.c:374 netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:409 netfs_retry_reads+0x159a/0x1d40 fs/netfs/read_retry.c:237 netfs_rreq_assess+0x5d3/0x870 fs/netfs/read_collect.c:374 netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:409 netfs_retry_reads+0x159a/0x1d40 fs/netfs/read_retry.c:237 netfs_rreq_assess+0x5d3/0x870 fs/netfs/read_collect.c:374 netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:409 netfs_retry_reads+0x159a/0x1d40 fs/netfs/read_retry.c:237 netfs_rreq_assess+0x5d3/0x870 fs/netfs/read_collect.c:374 netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:409 netfs_retry_reads+0x159a/0x1d40 fs/netfs/read_retry.c:237 netfs_rreq_assess+0x5d3/0x870 fs/netfs/read_collect.c:374 netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:409 netfs_retry_reads+0x159a/0x1d40 fs/netfs/read_retry.c:237 netfs_rreq_assess+0x5d3/0x870 fs/netfs/read_collect.c:374 netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:409 netfs_retry_reads+0x159a/0x1d40 fs/netfs/read_retry.c:237 netfs_rreq_assess+0x5d3/0x870 fs/netfs/read_collect.c:374 netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:409 netfs_retry_reads+0x159a/0x1d40 fs/netfs/read_retry.c:237 netfs_rreq_assess+0x5d3/0x870 fs/netfs/read_collect.c:374 netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:409 netfs_retry_reads+0x159a/0x1d40 fs/netfs/read_retry.c:237 netfs_rreq_assess+0x5d3/0x870 fs/netfs/read_collect.c:374 netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:409 netfs_retry_reads+0x159a/0x1d40 fs/netfs/read_retry.c:237 netfs_rreq_assess+0x5d3/0x870 fs/netfs/read_collect.c:374 netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:409 netfs_retry_reads+0x159a/0x1d40 fs/netfs/read_retry.c:237 netfs_rreq_assess+0x5d3/0x870 fs/netfs/read_collect.c:374 netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:409 netfs_retry_reads+0x159a/0x1d40 fs/netfs/read_retry.c:237 netfs_rreq_assess+0x5d3/0x870 fs/netfs/read_collect.c:374 netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:409 netfs_retry_reads+0x159a/0x1d40 fs/netfs/read_retry.c:237 netfs_rreq_assess+0x5d3/0x870 fs/netfs/read_collect.c:374 netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:409 netfs_retry_reads+0x159a/0x1d40 fs/netfs/read_retry.c:237 netfs_rreq_assess+0x5d3/0x870 fs/netfs/read_collect.c:374 netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:409 netfs_retry_reads+0x159a/0x1d40 fs/netfs/read_retry.c:237 netfs_rreq_assess+0x5d3/0x870 fs/netfs/read_collect.c:374 netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:409 netfs_retry_reads+0x159a/0x1d40 fs/netfs/read_retry.c:237 netfs_rreq_assess+0x5d3/0x870 fs/netfs/read_collect.c:374 netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:409 netfs_retry_reads+0x159a/0x1d40 fs/netfs/read_retry.c:237 netfs_rreq_assess+0x5d3/0x870 fs/netfs/read_collect.c:374 netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:409 netfs_retry_reads+0x159a/0x1d40 fs/netfs/read_retry.c:237 netfs_rreq_assess+0x5d3/0x870 fs/netfs/read_collect.c:374 netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:409 netfs_retry_reads+0x159a/0x1d40 fs/netfs/read_retry.c:237 netfs_rreq_assess+0x5d3/0x870 fs/netfs/read_collect.c:374 netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:409 netfs_retry_reads+0x159a/0x1d40 fs/netfs/read_retry.c:237 netfs_rreq_assess+0x5d3/0x870 fs/netfs/read_collect.c:374 netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:409 netfs_retry_reads+0x159a/0x1d40 fs/netfs/read_retry.c:237 netfs_rreq_assess+0x5d3/0x870 fs/netfs/read_collect.c:374 netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:409 netfs_retry_reads+0x159a/0x1d40 fs/netfs/read_retry.c:237 netfs_rreq_assess+0x5d3/0x870 fs/netfs/read_collect.c:374 netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:409 netfs_retry_reads+0x159a/0x1d40 fs/netfs/read_retry.c:237 netfs_rreq_assess+0x5d3/0x870 fs/netfs/read_collect.c:374 netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:409 netfs_retry_reads+0x159a/0x1d40 fs/netfs/read_retry.c:237 netfs_rreq_assess+0x5d3/0x870 fs/netfs/read_collect.c:374 netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:409 netfs_retry_reads+0x159a/0x1d40 fs/netfs/read_retry.c:237 netfs_rreq_assess+0x5d3/0x870 fs/netfs/read_collect.c:374 netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:409 netfs_retry_reads+0x159a/0x1d40 fs/netfs/read_retry.c:237 netfs_rreq_assess+0x5d3/0x870 fs/netfs/read_collect.c:374 netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:409 netfs_retry_reads+0x159a/0x1d40 fs/netfs/read_retry.c:237 netfs_rreq_assess+0x5d3/0x870 fs/netfs/read_collect.c:374 netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:409 netfs_retry_reads+0x159a/0x1d40 fs/netfs/read_retry.c:237 netfs_rreq_assess+0x5d3/0x870 fs/netfs/read_collect.c:374 netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:409 netfs_retry_reads+0x159a/0x1d40 fs/netfs/read_retry.c:237 netfs_rreq_assess+0x5d3/0x870 fs/netfs/read_collect.c:374 netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:409 netfs_retry_reads+0x159a/0x1d40 fs/netfs/read_retry.c:237 netfs_rreq_assess+0x5d3/0x870 fs/netfs/read_collect.c:374 netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:409 netfs_retry_reads+0x159a/0x1d40 fs/netfs/read_retry.c:237 netfs_rreq_assess+0x5d3/0x870 fs/netfs/read_collect.c:374 netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:409 netfs_retry_reads+0x159a/0x1d40 fs/netfs/read_retry.c:237 netfs_rreq_assess+0x5d3/0x870 fs/netfs/read_collect.c:374 netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:409 netfs_retry_reads+0x159a/0x1d40 fs/netfs/read_retry.c:237 netfs_rreq_assess+0x5d3/0x870 fs/netfs/read_collect.c:374 netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:409 netfs_retry_reads+0x159a/0x1d40 fs/netfs/read_retry.c:237 netfs_rreq_assess+0x5d3/0x870 fs/netfs/read_collect.c:374 netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:409 netfs_retry_reads+0x159a/0x1d40 fs/netfs/read_retry.c:237 netfs_rreq_assess+0x5d3/0x870 fs/netfs/read_collect.c:374 netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:409 netfs_retry_reads+0x159a/0x1d40 fs/netfs/read_retry.c:237 netfs_rreq_assess+0x5d3/0x870 fs/netfs/read_collect.c:374 netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:409 netfs_retry_reads+0x159a/0x1d40 fs/netfs/read_retry.c:237 netfs_rreq_assess+0x5d3/0x870 fs/netfs/read_collect.c:374 netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:409 netfs_retry_reads+0x159a/0x1d40 fs/netfs/read_retry.c:237 netfs_rreq_assess+0x5d3/0x870 fs/netfs/read_collect.c:374 netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:409 netfs_retry_reads+0x159a/0x1d40 fs/netfs/read_retry.c:237 netfs_rreq_assess+0x5d3/0x870 fs/netfs/read_collect.c:374 netfs_rreq_terminated+0xe5/0x110 fs/netfs/read_collect.c:409 netfs_dispatch_unbuffered_reads fs/netfs/direct_read.c:103 [inline] netfs_unbuffered_read fs/netfs/direct_read.c:127 [inline] netfs_unbuffered_read_iter_locked+0x12e1/0x19a0 fs/netfs/direct_read.c:221 netfs_unbuffered_read_iter+0xc5/0x100 fs/netfs/direct_read.c:256 v9fs_file_read_iter+0xbf/0x100 fs/9p/vfs_file.c:361 io_iter_do_read io_uring/rw.c:770 [inline] __io_read+0x320/0x1190 io_uring/rw.c:869 io_read+0x1e/0x70 io_uring/rw.c:947 io_issue_sqe+0x175/0x1200 io_uring/io_uring.c:1740 io_wq_submit_work+0x3fc/0xec0 io_uring/io_uring.c:1849 io_worker_handle_work+0x4e5/0x1680 io_uring/io-wq.c:601 io_wq_worker+0x33f/0xdf0 io_uring/io-wq.c:655 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 </TASK> Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:kasan_check_range+0x19/0x1a0 mm/kasan/generic.c:188 Code: 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 66 0f 1f 00 48 85 f6 0f 84 50 01 00 00 48 89 f8 41 54 44 0f b6 c2 48 01 f0 <55> 53 0f 82 c6 00 00 00 48 b8 ff ff ff ff ff 7f ff ff 48 39 f8 0f RSP: 0018:ffffc900034d8000 EFLAGS: 00010082 RAX: ffffffff96e51cc8 RBX: 0000000000000021 RCX: ffffffff8175d18e RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff96e51cc0 RBP: ffffc900034d8158 R08: 0000000000000000 R09: 0000000000000000 R10: ffffffff96e51daf R11: 000000000009dbe3 R12: ffff888025064880 R13: 0000000000000200 R14: 0000000000000009 R15: 1ffff9200069b00a FS: 000055556e7a2380(0000) GS:ffff88806a800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffc900034d7ff8 CR3: 00000000208ec000 CR4: 0000000000352ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 00 90 90 90 90 90 add %dl,-0x6f6f6f70(%rax) 6: 90 nop 7: 90 nop 8: 90 nop 9: 90 nop a: 90 nop b: 90 nop c: 90 nop d: 90 nop e: 90 nop f: 90 nop 10: 90 nop 11: 66 0f 1f 00 nopw (%rax) 15: 48 85 f6 test %rsi,%rsi 18: 0f 84 50 01 00 00 je 0x16e 1e: 48 89 f8 mov %rdi,%rax 21: 41 54 push %r12 23: 44 0f b6 c2 movzbl %dl,%r8d 27: 48 01 f0 add %rsi,%rax * 2a: 55 push %rbp <-- trapping instruction 2b: 53 push %rbx 2c: 0f 82 c6 00 00 00 jb 0xf8 32: 48 b8 ff ff ff ff ff movabs $0xffff7fffffffffff,%rax 39: 7f ff ff 3c: 48 39 f8 cmp %rdi,%rax 3f: 0f .byte 0xf --- 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. 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
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