kernel BUG in bch2_btree_path_level_init

Status: auto-obsoleted due to no activity on 2024/10/01 02:22
Subsystems: fs
[Documentation on labels]
Reported-by: syzbot+dd828a1b596932a42e10@syzkaller.appspotmail.com
First crash: 828d, last: 813d
▶ ▼ Discussions (1)
Title Replies (including bot) Last reply
[syzbot] [bcachefs?] kernel BUG in bch2_btree_path_level_init 0 (1) 2024/06/12 07:04
▶ ▼ Similar bugs (3)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream kernel BUG in bch2_btree_path_level_init (2) fs -1 syz, C done 29 641d 691d 28/29 fixed on 2024/12/16 09:50
upstream kernel BUG in bch2_btree_path_level_init (4) fs -1 syz, C done done 286 340d 374d 0/29 auto-obsoleted due to no activity on 2025/12/18 08:24
upstream kernel BUG in bch2_btree_path_level_init (3) fs -1 syz, C done 489 375d 632d 29/29 fixed on 2025/09/04 16:57
▶ ▼ Last patch testing requests (2)
Created Duration User Patch Repo Result
2024/09/01 02:30 31m retest repro git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci no crash log
2024/06/22 23:09 3h12m retest repro git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci report log

Sample crash report:
------------[ cut here ]------------
kernel BUG at fs/bcachefs/btree_iter.c:645!
Internal error: Oops - BUG: 00000000f2000800 [#1] PREEMPT SMP
Modules linked in:
CPU: 1 PID: 27 Comm: kworker/1:1 Tainted: G        W          6.10.0-rc2-syzkaller-g8867bbd4a056 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024
Workqueue: bcachefs_write_ref bch2_do_invalidates_work
pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : bch2_btree_path_level_init+0x820/0x83c fs/bcachefs/btree_iter.c:113
lr : btree_path_pos_in_node fs/bcachefs/btree_iter.c:113 [inline]
lr : bch2_btree_path_level_init+0x820/0x83c fs/bcachefs/btree_iter.c:645
sp : ffff800093f06d30
x29: ffff800093f06d40 x28: dfff800000000000 x27: 0000000000000000
x26: 0000000000000000 x25: 0000000000008000 x24: 0000000000000000
x23: 0000000000000000 x22: 0000000000000000 x21: ffff0000d4718234
x20: ffff0000d8597800 x19: ffff0000d4718230 x18: ffff800093f079d4
x17: 000000000000cd7d x16: ffff80008af156e8 x15: ffff7000127e0d94
x14: ffff80008eff0558 x13: dfff800000000000 x12: 00000000e50ce57d
x11: 0000000000000002 x10: 0000000000ff0100 x9 : 0000000000000000
x8 : ffff0000c1b7dac0 x7 : ffff80008278cf60 x6 : 0000000000000000
x5 : 0000000000000000 x4 : 0000000000000001 x3 : 0000000000000000
x2 : ffff0000d8597800 x1 : 0000000000008000 x0 : 0000000000000000
Call trace:
 btree_path_pos_in_node fs/bcachefs/btree_iter.c:113 [inline]
 bch2_btree_path_level_init+0x820/0x83c fs/bcachefs/btree_iter.c:645
 btree_path_lock_root fs/bcachefs/btree_iter.c:783 [inline]
 bch2_btree_path_traverse_one+0xd84/0x285c fs/bcachefs/btree_iter.c:1182
 bch2_btree_path_traverse fs/bcachefs/btree_iter.h:229 [inline]
 __bch2_btree_iter_peek fs/bcachefs/btree_iter.c:2185 [inline]
 bch2_btree_iter_peek_upto+0xbd8/0x56e4 fs/bcachefs/btree_iter.c:2285
 bch2_btree_iter_peek_upto_type fs/bcachefs/btree_iter.h:641 [inline]
 bch2_do_invalidates_work+0x454/0x249c fs/bcachefs/alloc_background.c:2010
 process_one_work+0x7b0/0x15e8 kernel/workqueue.c:3231
 process_scheduled_works kernel/workqueue.c:3312 [inline]
 worker_thread+0x938/0xef4 kernel/workqueue.c:3393
 kthread+0x288/0x310 kernel/kthread.c:389
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:860
Code: d4210000 9777e81c d4210000 9777e81a (d4210000) 
---[ end trace 0000000000000000 ]---

Crashes (2):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2024/06/08 07:37 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 8867bbd4a056 82c05ab8 .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro] ci-upstream-gce-arm64 kernel BUG in bch2_btree_path_level_init
2024/06/08 06:54 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 8867bbd4a056 82c05ab8 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 kernel BUG in bch2_btree_path_level_init
* Struck through repros no longer work on HEAD.