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Message-ID: <000000000000038144061c6d18f2@google.com>
Date: Thu, 04 Jul 2024 07:52:20 -0700
From: syzbot <syzbot+853d80cba98ce1157ae6@...kaller.appspotmail.com>
To: clm@...com, dsterba@...e.com, josef@...icpanda.com,
linux-btrfs@...r.kernel.org, linux-kernel@...r.kernel.org,
syzkaller-bugs@...glegroups.com
Subject: [syzbot] [btrfs?] KASAN: slab-use-after-free Read in add_ra_bio_pages (3)
Hello,
syzbot found the following issue on:
HEAD commit: 563a50672d8a Merge tag 'xfs-6.10-fixes-4' of git://git.ker..
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=121b7c12980000
kernel config: https://syzkaller.appspot.com/x/.config?x=d24262d81a9225c6
dashboard link: https://syzkaller.appspot.com/bug?extid=853d80cba98ce1157ae6
compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40
userspace arch: i386
Unfortunately, I don't have any reproducer for this issue yet.
Downloadable assets:
disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/7bc7510fe41f/non_bootable_disk-563a5067.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/a93ed9769202/vmlinux-563a5067.xz
kernel image: https://storage.googleapis.com/syzbot-assets/0cca71a4aab6/bzImage-563a5067.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+853d80cba98ce1157ae6@...kaller.appspotmail.com
==================================================================
BUG: KASAN: slab-use-after-free in add_ra_bio_pages.constprop.0.isra.0+0xf03/0xfb0 fs/btrfs/compression.c:529
Read of size 8 at addr ffff88805a317178 by task syz-executor.2/12977
CPU: 0 PID: 12977 Comm: syz-executor.2 Not tainted 6.10.0-rc4-syzkaller-00283-g563a50672d8a #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
Call Trace:
<TASK>
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:114
print_address_description mm/kasan/report.c:377 [inline]
print_report+0xc3/0x620 mm/kasan/report.c:488
kasan_report+0xd9/0x110 mm/kasan/report.c:601
add_ra_bio_pages.constprop.0.isra.0+0xf03/0xfb0 fs/btrfs/compression.c:529
btrfs_submit_compressed_read+0x5fb/0x930 fs/btrfs/compression.c:617
submit_one_bio+0x15c/0x1c0 fs/btrfs/extent_io.c:118
btrfs_readahead+0x132b/0x15c0 fs/btrfs/extent_io.c:2318
read_pages+0x1a8/0xd80 mm/readahead.c:160
page_cache_ra_unbounded+0x2d8/0x5a0 mm/readahead.c:273
do_page_cache_ra mm/readahead.c:303 [inline]
page_cache_ra_order+0x6e5/0xae0 mm/readahead.c:547
ondemand_readahead+0x520/0x1140 mm/readahead.c:669
page_cache_sync_ra+0x174/0x1d0 mm/readahead.c:696
page_cache_sync_readahead include/linux/pagemap.h:1306 [inline]
filemap_get_pages+0xc01/0x1830 mm/filemap.c:2529
filemap_read+0x3af/0xd10 mm/filemap.c:2625
btrfs_file_read_iter+0x1dc/0x840 fs/btrfs/file.c:4025
copy_splice_read+0x615/0xb80 fs/splice.c:365
do_splice_read fs/splice.c:984 [inline]
do_splice_read+0x2cf/0x380 fs/splice.c:959
splice_direct_to_actor+0x2a4/0xa40 fs/splice.c:1089
do_splice_direct_actor fs/splice.c:1207 [inline]
do_splice_direct+0x17e/0x250 fs/splice.c:1233
do_sendfile+0xb1e/0xe50 fs/read_write.c:1295
__do_compat_sys_sendfile fs/read_write.c:1383 [inline]
__se_compat_sys_sendfile fs/read_write.c:1366 [inline]
__ia32_compat_sys_sendfile+0x1e7/0x230 fs/read_write.c:1366
do_syscall_32_irqs_on arch/x86/entry/common.c:165 [inline]
__do_fast_syscall_32+0x73/0x120 arch/x86/entry/common.c:386
do_fast_syscall_32+0x32/0x80 arch/x86/entry/common.c:411
entry_SYSENTER_compat_after_hwframe+0x84/0x8e
RIP: 0023:0xf72b9579
Code: b8 01 10 06 03 74 b4 01 10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 00 00 00 00 00 00 00 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 8d b4 26 00 00 00 00 8d b4 26 00 00 00 00
RSP: 002b:00000000f5e8a5ac EFLAGS: 00000292 ORIG_RAX: 00000000000000bb
RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 0000000000000004
RDX: 0000000000000000 RSI: 0000000000201005 RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000292 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
</TASK>
Allocated by task 12977:
kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
kasan_save_track+0x14/0x30 mm/kasan/common.c:68
unpoison_slab_object mm/kasan/common.c:312 [inline]
__kasan_slab_alloc+0x89/0x90 mm/kasan/common.c:338
kasan_slab_alloc include/linux/kasan.h:201 [inline]
slab_post_alloc_hook mm/slub.c:3941 [inline]
slab_alloc_node mm/slub.c:4001 [inline]
kmem_cache_alloc_noprof+0x121/0x2f0 mm/slub.c:4008
alloc_extent_map+0x1c/0x100 fs/btrfs/extent_map.c:48
btrfs_get_extent+0x223/0x1aa0 fs/btrfs/inode.c:6826
btrfs_dio_iomap_begin+0x6e9/0x1e40 fs/btrfs/inode.c:7617
iomap_iter+0x61f/0x1080 fs/iomap/iter.c:91
__iomap_dio_rw+0x6ba/0x1c70 fs/iomap/direct-io.c:659
iomap_dio_rw+0x40/0xa0 fs/iomap/direct-io.c:749
btrfs_dio_read+0xb1/0xf0 fs/btrfs/inode.c:7881
btrfs_direct_read fs/btrfs/file.c:3980 [inline]
btrfs_file_read_iter+0x5c4/0x840 fs/btrfs/file.c:4019
copy_splice_read+0x615/0xb80 fs/splice.c:365
do_splice_read fs/splice.c:984 [inline]
do_splice_read+0x2cf/0x380 fs/splice.c:959
splice_direct_to_actor+0x2a4/0xa40 fs/splice.c:1089
do_splice_direct_actor fs/splice.c:1207 [inline]
do_splice_direct+0x17e/0x250 fs/splice.c:1233
do_sendfile+0xb1e/0xe50 fs/read_write.c:1295
__do_compat_sys_sendfile fs/read_write.c:1383 [inline]
__se_compat_sys_sendfile fs/read_write.c:1366 [inline]
__ia32_compat_sys_sendfile+0x1e7/0x230 fs/read_write.c:1366
do_syscall_32_irqs_on arch/x86/entry/common.c:165 [inline]
__do_fast_syscall_32+0x73/0x120 arch/x86/entry/common.c:386
do_fast_syscall_32+0x32/0x80 arch/x86/entry/common.c:411
entry_SYSENTER_compat_after_hwframe+0x84/0x8e
Freed by task 12977:
kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
kasan_save_track+0x14/0x30 mm/kasan/common.c:68
kasan_save_free_info+0x3b/0x60 mm/kasan/generic.c:579
poison_slab_object+0xf7/0x160 mm/kasan/common.c:240
__kasan_slab_free+0x32/0x50 mm/kasan/common.c:256
kasan_slab_free include/linux/kasan.h:184 [inline]
slab_free_hook mm/slub.c:2196 [inline]
slab_free mm/slub.c:4437 [inline]
kmem_cache_free+0x12f/0x3a0 mm/slub.c:4512
free_extent_map fs/btrfs/extent_map.c:68 [inline]
free_extent_map+0xeb/0x140 fs/btrfs/extent_map.c:61
add_ra_bio_pages.constprop.0.isra.0+0x772/0xfb0 fs/btrfs/compression.c:517
btrfs_submit_compressed_read+0x5fb/0x930 fs/btrfs/compression.c:617
submit_one_bio+0x15c/0x1c0 fs/btrfs/extent_io.c:118
btrfs_readahead+0x132b/0x15c0 fs/btrfs/extent_io.c:2318
read_pages+0x1a8/0xd80 mm/readahead.c:160
page_cache_ra_unbounded+0x2d8/0x5a0 mm/readahead.c:273
do_page_cache_ra mm/readahead.c:303 [inline]
page_cache_ra_order+0x6e5/0xae0 mm/readahead.c:547
ondemand_readahead+0x520/0x1140 mm/readahead.c:669
page_cache_sync_ra+0x174/0x1d0 mm/readahead.c:696
page_cache_sync_readahead include/linux/pagemap.h:1306 [inline]
filemap_get_pages+0xc01/0x1830 mm/filemap.c:2529
filemap_read+0x3af/0xd10 mm/filemap.c:2625
btrfs_file_read_iter+0x1dc/0x840 fs/btrfs/file.c:4025
copy_splice_read+0x615/0xb80 fs/splice.c:365
do_splice_read fs/splice.c:984 [inline]
do_splice_read+0x2cf/0x380 fs/splice.c:959
splice_direct_to_actor+0x2a4/0xa40 fs/splice.c:1089
do_splice_direct_actor fs/splice.c:1207 [inline]
do_splice_direct+0x17e/0x250 fs/splice.c:1233
do_sendfile+0xb1e/0xe50 fs/read_write.c:1295
__do_compat_sys_sendfile fs/read_write.c:1383 [inline]
__se_compat_sys_sendfile fs/read_write.c:1366 [inline]
__ia32_compat_sys_sendfile+0x1e7/0x230 fs/read_write.c:1366
do_syscall_32_irqs_on arch/x86/entry/common.c:165 [inline]
__do_fast_syscall_32+0x73/0x120 arch/x86/entry/common.c:386
do_fast_syscall_32+0x32/0x80 arch/x86/entry/common.c:411
entry_SYSENTER_compat_after_hwframe+0x84/0x8e
The buggy address belongs to the object at ffff88805a317160
which belongs to the cache btrfs_extent_map of size 112
The buggy address is located 24 bytes inside of
freed 112-byte region [ffff88805a317160, ffff88805a3171d0)
The buggy address belongs to the physical page:
page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x5a317
flags: 0x4fff00000000000(node=1|zone=1|lastcpupid=0x7ff)
page_type: 0xffffefff(slab)
raw: 04fff00000000000 ffff888025885900 ffffea0001570100 0000000000000006
raw: 0000000000000000 0000000080170017 00000001ffffefff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 0, migratetype Unmovable, gfp_mask 0x152c40(GFP_NOFS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_HARDWALL), pid 40, tgid 40 (kworker/u32:2), ts 494044152115, free_ts 493554824903
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x2d1/0x350 mm/page_alloc.c:1468
prep_new_page mm/page_alloc.c:1476 [inline]
get_page_from_freelist+0x136a/0x2e50 mm/page_alloc.c:3420
__alloc_pages_noprof+0x22b/0x2460 mm/page_alloc.c:4678
__alloc_pages_node_noprof include/linux/gfp.h:269 [inline]
alloc_pages_node_noprof include/linux/gfp.h:296 [inline]
alloc_slab_page+0x56/0x110 mm/slub.c:2265
allocate_slab mm/slub.c:2428 [inline]
new_slab+0x84/0x260 mm/slub.c:2481
___slab_alloc+0xdac/0x1870 mm/slub.c:3667
__slab_alloc.constprop.0+0x56/0xb0 mm/slub.c:3757
__slab_alloc_node mm/slub.c:3810 [inline]
slab_alloc_node mm/slub.c:3989 [inline]
kmem_cache_alloc_noprof+0x2ae/0x2f0 mm/slub.c:4008
alloc_extent_map fs/btrfs/extent_map.c:48 [inline]
btrfs_drop_extent_map_range+0xb7/0x13d0 fs/btrfs/extent_map.c:719
btrfs_replace_extent_map_range+0xfb/0x1b0 fs/btrfs/extent_map.c:932
create_io_em+0x22c/0x760 fs/btrfs/inode.c:7361
cow_file_range+0x530/0xeb0 fs/btrfs/inode.c:1438
run_delalloc_cow+0xa7/0x150 fs/btrfs/inode.c:1751
submit_uncompressed_range.isra.0+0x124/0x350 fs/btrfs/inode.c:1128
submit_one_async_extent fs/btrfs/inode.c:1179 [inline]
submit_compressed_extents+0x732/0x13a0 fs/btrfs/inode.c:1641
run_ordered_work fs/btrfs/async-thread.c:245 [inline]
btrfs_work_helper+0x2d2/0xc90 fs/btrfs/async-thread.c:324
page last free pid 12763 tgid 12762 stack trace:
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1088 [inline]
free_unref_page+0x64a/0xe40 mm/page_alloc.c:2583
__folio_put+0x239/0x360 mm/swap.c:129
folio_put include/linux/mm.h:1508 [inline]
put_page include/linux/mm.h:1580 [inline]
skb_page_unref include/linux/skbuff_ref.h:44 [inline]
__skb_frag_unref include/linux/skbuff_ref.h:57 [inline]
skb_release_data+0x5df/0x980 net/core/skbuff.c:1102
skb_release_all net/core/skbuff.c:1173 [inline]
__kfree_skb+0x4f/0x70 net/core/skbuff.c:1187
tcp_wmem_free_skb include/net/tcp.h:306 [inline]
tcp_write_queue_purge+0x188/0xd60 net/ipv4/tcp.c:3000
tcp_v4_destroy_sock+0xfa/0x590 net/ipv4/tcp_ipv4.c:2524
inet_csk_destroy_sock+0x1a3/0x450 net/ipv4/inet_connection_sock.c:1225
__tcp_close+0xbfc/0xfe0 net/ipv4/tcp.c:2947
tcp_close+0x28/0x130 net/ipv4/tcp.c:2959
inet_release+0x13c/0x280 net/ipv4/af_inet.c:437
__sock_release+0xb0/0x270 net/socket.c:659
sock_close+0x1c/0x30 net/socket.c:1421
__fput+0x408/0xbb0 fs/file_table.c:422
task_work_run+0x14e/0x250 kernel/task_work.c:180
get_signal+0x1d3/0x2670 kernel/signal.c:2681
arch_do_signal_or_restart+0x90/0x7e0 arch/x86/kernel/signal.c:310
Memory state around the buggy address:
ffff88805a317000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc
ffff88805a317080: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb
>ffff88805a317100: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb
^
ffff88805a317180: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc
ffff88805a317200: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
----------------
Code disassembly (best guess), 2 bytes skipped:
0: 10 06 adc %al,(%rsi)
2: 03 74 b4 01 add 0x1(%rsp,%rsi,4),%esi
6: 10 07 adc %al,(%rdi)
8: 03 74 b0 01 add 0x1(%rax,%rsi,4),%esi
c: 10 08 adc %cl,(%rax)
e: 03 74 d8 01 add 0x1(%rax,%rbx,8),%esi
1e: 00 51 52 add %dl,0x52(%rcx)
21: 55 push %rbp
22: 89 e5 mov %esp,%ebp
24: 0f 34 sysenter
26: cd 80 int $0x80
* 28: 5d pop %rbp <-- trapping instruction
29: 5a pop %rdx
2a: 59 pop %rcx
2b: c3 ret
2c: 90 nop
2d: 90 nop
2e: 90 nop
2f: 90 nop
30: 8d b4 26 00 00 00 00 lea 0x0(%rsi,%riz,1),%esi
37: 8d b4 26 00 00 00 00 lea 0x0(%rsi,%riz,1),%esi
---
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 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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