syzbot


kernel panic: bcachefs (loop3): panic after error

Status: upstream: reported C repro on 2024/10/13 14:27
Subsystems: bcachefs
[Documentation on labels]
Reported-by: syzbot+e6ea15c610261d2106ba@syzkaller.appspotmail.com
First crash: 126d, last: 16d
Cause bisection: failed (error log, bisect log)
  
Discussions (1)
Title Replies (including bot) Last reply
[syzbot] [bcachefs?] kernel panic: bcachefs (loop3): panic after error 1 (3) 2024/12/19 23:38
Last patch testing requests (3)
Created Duration User Patch Repo Result
2025/01/05 14:35 12m retest repro upstream report log
2025/01/03 01:15 20m retest repro linux-next report log
2024/10/26 09:40 14m retest repro upstream report log
Fix bisection attempts (1)
Created Duration User Patch Repo Result
2025/01/28 01:41 1h53m bisect fix upstream OK (0) job log log

Sample crash report:
bcachefs (loop3): starting version 1.7: mi_btree_bitmap opts=errors=panic,metadata_checksum=crc64,data_checksum=none,compression=lz4,background_compression=gzip,no_splitbrain_check,nocow
superblock marked clean but clean section not present, shutting down
Kernel panic - not syncing: bcachefs (loop3): panic after error
CPU: 0 UID: 0 PID: 5901 Comm: syz-executor172 Not tainted 6.13.0-rc3-next-20241219-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/25/2024
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:94 [inline]
 dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120
 panic+0x349/0x880 kernel/panic.c:354
 bch2_inconsistent_error+0x146/0x150 fs/bcachefs/error.c:28
 __bch2_fsck_err+0x10de/0x1420 fs/bcachefs/error.c:438
 bch2_read_superblock_clean+0x166/0x260 fs/bcachefs/sb-clean.c:156
 bch2_fs_recovery+0x1e6/0x3de0 fs/bcachefs/recovery.c:707
 bch2_fs_start+0x37c/0x610 fs/bcachefs/super.c:1032
 bch2_fs_get_tree+0xd8d/0x1740 fs/bcachefs/fs.c:2200
 vfs_get_tree+0x90/0x2b0 fs/super.c:1814
 do_new_mount+0x2be/0xb40 fs/namespace.c:3556
 do_mount fs/namespace.c:3896 [inline]
 __do_sys_mount fs/namespace.c:4107 [inline]
 __se_sys_mount+0x2d6/0x3c0 fs/namespace.c:4084
 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: 0033:0x7fb599d79a6a
Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb a6 e8 7e 09 00 00 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffe81ab3658 EFLAGS: 00000282 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fb599d79a6a
RDX: 00000000200058c0 RSI: 0000000020000100 RDI: 00007ffe81ab36b0
RBP: 0000000000000004 R08: 00007ffe81ab36f0 R09: 0000000000005951
R10: 0000000000000000 R11: 0000000000000282 R12: 00007ffe81ab36f0
R13: 0000000001000000 R14: 0000000000000003 R15: 0000000000000000
 </TASK>
Kernel Offset: disabled
Rebooting in 86400 seconds..

Crashes (2):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2024/12/19 23:38 linux-next 8503810115fb 1d58202c .config strace log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro] ci-upstream-linux-next-kasan-gce-root kernel panic: bcachefs (loop3): panic after error
2024/10/09 14:24 upstream 75b607fab38d 56fb2cb7 .config console log report syz / log [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-upstream-fs kernel panic: bcachefs (loop3): panic after error
* Struck through repros no longer work on HEAD.