syzbot


WARNING in __btrfs_check_leaf

Status: upstream: reported on 2024/08/23 12:08
Subsystems: btrfs
[Documentation on labels]
Reported-by: syzbot+d7d1fc7e21835ca19219@syzkaller.appspotmail.com
First crash: 46d, last: 4d13h
Discussions (1)
Title Replies (including bot) Last reply
[syzbot] [btrfs?] WARNING in __btrfs_check_leaf 1 (2) 2024/08/26 15:10

Sample crash report:
------------[ cut here ]------------
WARNING: CPU: 1 PID: 5231 at fs/btrfs/tree-checker.c:1545 check_extent_item fs/btrfs/tree-checker.c:1545 [inline]
WARNING: CPU: 1 PID: 5231 at fs/btrfs/tree-checker.c:1545 check_leaf_item fs/btrfs/tree-checker.c:1880 [inline]
WARNING: CPU: 1 PID: 5231 at fs/btrfs/tree-checker.c:1545 __btrfs_check_leaf+0x3552/0x6430 fs/btrfs/tree-checker.c:2039
Modules linked in:
CPU: 1 UID: 0 PID: 5231 Comm: syz-executor Not tainted 6.12.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
RIP: 0010:check_extent_item fs/btrfs/tree-checker.c:1545 [inline]
RIP: 0010:check_leaf_item fs/btrfs/tree-checker.c:1880 [inline]
RIP: 0010:__btrfs_check_leaf+0x3552/0x6430 fs/btrfs/tree-checker.c:2039
Code: 48 8b 44 24 60 48 89 84 24 08 01 00 00 0f b6 44 24 70 41 89 c6 e9 3b fa ff ff e8 19 ad be fd e9 38 fe ff ff e8 0f ad be fd 90 <0f> 0b 90 e9 c9 fd ff ff 89 d9 80 e1 07 80 c1 03 38 c1 0f 8c 91 fb
RSP: 0018:ffffc9000385e7c0 EFLAGS: 00010293
RAX: ffffffff83d62e51 RBX: 0000000000000000 RCX: ffff88801c790000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc9000385edd8 R08: ffffffff83d62aec R09: ffffffff83d629a5
R10: 0000000000000005 R11: ffff88801c790000 R12: dffffc0000000000
R13: 0000000000000fc7 R14: ffff8880250420bc R15: 0000000000000005
FS:  0000555587cac500(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f09d850c000 CR3: 00000000648c4000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 btrfs_check_leaf+0x16/0x40 fs/btrfs/tree-checker.c:2055
 btree_csum_one_bio+0x41a/0x890 fs/btrfs/disk-io.c:299
 btrfs_bio_csum fs/btrfs/bio.c:526 [inline]
 btrfs_submit_chunk fs/btrfs/bio.c:744 [inline]
 btrfs_submit_bbio+0x13e1/0x18a0 fs/btrfs/bio.c:784
 submit_eb_page fs/btrfs/extent_io.c:1887 [inline]
 btree_write_cache_pages+0x1099/0x1770 fs/btrfs/extent_io.c:1937
 do_writepages+0x35d/0x870 mm/page-writeback.c:2683
 filemap_fdatawrite_wbc+0x125/0x180 mm/filemap.c:398
 __filemap_fdatawrite_range mm/filemap.c:431 [inline]
 filemap_fdatawrite_range+0x11a/0x180 mm/filemap.c:449
 btrfs_write_marked_extents+0x27d/0x450 fs/btrfs/transaction.c:1151
 btrfs_write_and_wait_transaction fs/btrfs/transaction.c:1259 [inline]
 btrfs_commit_transaction+0x1de1/0x3740 fs/btrfs/transaction.c:2521
 sync_filesystem+0x1c8/0x230 fs/sync.c:66
 generic_shutdown_super+0x72/0x2d0 fs/super.c:621
 kill_anon_super+0x3b/0x70 fs/super.c:1237
 btrfs_kill_super+0x41/0x50 fs/btrfs/super.c:2121
 deactivate_locked_super+0xc4/0x130 fs/super.c:473
 cleanup_mnt+0x41f/0x4b0 fs/namespace.c:1373
 task_work_run+0x24f/0x310 kernel/task_work.c:228
 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
 exit_to_user_mode_loop kernel/entry/common.c:114 [inline]
 exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
 __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
 syscall_exit_to_user_mode+0x168/0x370 kernel/entry/common.c:218
 do_syscall_64+0x100/0x230 arch/x86/entry/common.c:89
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fdf4697f327
Code: a8 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 0f 1f 44 00 00 31 f6 e9 09 00 00 00 66 0f 1f 84 00 00 00 00 00 b8 a6 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 01 c3 48 c7 c2 a8 ff ff ff f7 d8 64 89 02 b8
RSP: 002b:00007ffda8534848 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007fdf4697f327
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffda8534900
RBP: 00007ffda8534900 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000246 R12: 00007ffda8535980
R13: 00007fdf469f0134 R14: 0000000000015fea R15: 00007ffda85359c0
 </TASK>

Crashes (4):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2024/09/30 12:11 upstream 9852d85ec9d4 bbd4e0a4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in __btrfs_check_leaf
2024/09/29 15:11 upstream 3efc57369a0c ba29ff75 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in __btrfs_check_leaf
2024/08/22 01:28 upstream 872cf28b8df9 db5852f9 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in __btrfs_check_leaf
2024/08/19 11:57 upstream 47ac09b91bef 9f0ab3fb .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in __btrfs_check_leaf
* Struck through repros no longer work on HEAD.