syzbot


WARNING in __btrfs_free_extent

Status: upstream: reported C repro on 2022/12/14 03:41
Subsystems: btrfs
[Documentation on labels]
Reported-by: syzbot+229dc7e0f919106eb073@syzkaller.appspotmail.com
First crash: 547d, last: 529d
Fix bisection: failed (error log, bisect log)
  
Similar bugs (2)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream WARNING in __btrfs_free_extent btrfs C error 300 30d 588d 26/28 fixed on 2024/05/22 09:57
linux-6.1 WARNING in __btrfs_free_extent 1 17d 17d 0/3 upstream: reported on 2024/05/27 10:24

Sample crash report:
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
BTRFS error (device loop0): tree block 5275648 owner 1 already locked by pid=8120, extent tree corruption detected
------------[ cut here ]------------
WARNING: CPU: 1 PID: 8120 at fs/btrfs/extent-tree.c:6808 __btrfs_free_extent.isra.0+0x73b/0x1450 fs/btrfs/extent-tree.c:6808
Kernel panic - not syncing: panic_on_warn set ...

CPU: 1 PID: 8120 Comm: syz-executor306 Not tainted 4.19.211-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x1fc/0x2ef lib/dump_stack.c:118
 panic+0x26a/0x50e kernel/panic.c:186
 __warn.cold+0x20/0x5a kernel/panic.c:541
 report_bug+0x262/0x2b0 lib/bug.c:183
 fixup_bug arch/x86/kernel/traps.c:178 [inline]
 fixup_bug arch/x86/kernel/traps.c:173 [inline]
 do_error_trap+0x1d7/0x310 arch/x86/kernel/traps.c:296
 invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:1038
RIP: 0010:__btrfs_free_extent.isra.0+0x73b/0x1450 fs/btrfs/extent-tree.c:6808
Code: 89 ee bf fb ff ff ff e8 e3 3e 7f fe 41 83 fd fb 0f 84 0c d1 16 05 e8 64 3d 7f fe 44 89 ee 48 c7 c7 40 23 a4 88 e8 3a 75 0f 05 <0f> 0b e8 4e 3d 7f fe 48 8b 7c 24 28 44 89 e9 ba 98 1a 00 00 48 c7
RSP: 0018:ffff888095cdf0f8 EFLAGS: 00010286
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff814dff01 RDI: ffffed1012b9be11
RBP: ffff8880b48cd210 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000005 R11: 0000000000000000 R12: 0000000000000000
R13: 00000000ffffff8b R14: 0000000000000000 R15: 0000000000503000
 run_delayed_tree_ref fs/btrfs/extent-tree.c:2339 [inline]
 run_one_delayed_ref fs/btrfs/extent-tree.c:2364 [inline]
 __btrfs_run_delayed_refs+0x172b/0x3de0 fs/btrfs/extent-tree.c:2638
 btrfs_run_delayed_refs.part.0+0x9a/0x310 fs/btrfs/extent-tree.c:2936
 btrfs_run_delayed_refs+0xad/0xf0 fs/btrfs/extent-tree.c:2925
 btrfs_commit_transaction+0x173/0x2480 fs/btrfs/transaction.c:1972
 insert_balance_item.isra.0+0x138/0x1430 fs/btrfs/volumes.c:3082
 btrfs_balance+0xd8f/0x3f30 fs/btrfs/volumes.c:3865
 btrfs_ioctl_balance+0x620/0x750 fs/btrfs/ioctl.c:5141
 btrfs_ioctl+0xd80/0x76d0 fs/btrfs/ioctl.c:6001
 vfs_ioctl fs/ioctl.c:46 [inline]
 file_ioctl fs/ioctl.c:501 [inline]
 do_vfs_ioctl+0xcdb/0x12e0 fs/ioctl.c:688
 ksys_ioctl+0x9b/0xc0 fs/ioctl.c:705
 __do_sys_ioctl fs/ioctl.c:712 [inline]
 __se_sys_ioctl fs/ioctl.c:710 [inline]
 __x64_sys_ioctl+0x6f/0xb0 fs/ioctl.c:710
 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x7f0df1caece9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 51 14 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 c0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffe45060898 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 0000000000000001 RCX: 00007f0df1caece9
RDX: 0000000000000000 RSI: 00000000c4009420 RDI: 0000000000000004
RBP: 00007ffe450608a0 R08: 0000000000000001 R09: 00007f0df1c60036
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000005
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
Kernel Offset: disabled
Rebooting in 86400 seconds..

Crashes (4):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2022/12/14 03:59 linux-4.19.y 3f8a27f9e27b f6511626 .config console log report syz C [disk image] [vmlinux] [mounted in repro] ci2-linux-4-19 WARNING in __btrfs_free_extent
2023/01/01 03:49 linux-4.19.y 3f8a27f9e27b ab32d508 .config console log report info [disk image] [vmlinux] ci2-linux-4-19 WARNING in __btrfs_free_extent
2022/12/21 06:32 linux-4.19.y 3f8a27f9e27b d3e76707 .config console log report info [disk image] [vmlinux] ci2-linux-4-19 WARNING in __btrfs_free_extent
2022/12/14 03:40 linux-4.19.y 3f8a27f9e27b f6511626 .config console log report info [disk image] [vmlinux] ci2-linux-4-19 WARNING in __btrfs_free_extent
* Struck through repros no longer work on HEAD.