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kernel BUG in bch2_quota_check_limit

Status: upstream: reported C repro on 2024/09/22 13:58
Subsystems: bcachefs
[Documentation on labels]
Reported-by: syzbot+8364d1e040a88ed5657d@syzkaller.appspotmail.com
First crash: 389d, last: 1d11h
Cause bisection: introduced by (bisect log) :
commit 03ef80b469d5d83530ce1ce15be78a40e5300f9b
Author: Kent Overstreet <kent.overstreet@linux.dev>
Date: Sat Sep 23 22:41:51 2023 +0000

  bcachefs: Ignore unknown mount options

Crash: kernel BUG in bch2_quota_check_limit (log)
Repro: C syz .config
  
▶ ▼ Discussions (6)
Title Replies (including bot) Last reply
[syzbot] Monthly bcachefs report (Sep 2025) 0 (1) 2025/09/26 05:14
[syzbot] Monthly bcachefs report (Aug 2025) 0 (1) 2025/08/26 07:13
[syzbot] Monthly bcachefs report (Jul 2025) 0 (1) 2025/07/25 12:39
[syzbot] Monthly bcachefs report (May 2025) 0 (1) 2025/05/24 10:04
[syzbot] Monthly bcachefs report (Apr 2025) 0 (1) 2025/04/22 12:41
[syzbot] [bcachefs?] kernel BUG in bch2_quota_check_limit 0 (3) 2025/02/13 12:45
▶ ▼ Last patch testing requests (3)
Created Duration User Patch Repo Result
2025/08/09 22:43 18m retest repro git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci report log
2025/06/26 15:35 23m retest repro upstream OK log
2025/06/23 01:38 19m retest repro upstream OK log

Sample crash report:
------------[ cut here ]------------
kernel BUG at fs/bcachefs/quota.c:232!
Internal error: Oops - BUG: 00000000f2000800 [#1]  SMP
Modules linked in:
CPU: 0 UID: 0 PID: 6719 Comm: syz.0.17 Not tainted syzkaller #0 PREEMPT 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/30/2025
pstate: 83400005 (Nzcv daif +PAN -UAO +TCO +DIT -SSBS BTYPE=--)
pc : bch2_quota_check_limit+0xb2c/0xb50 fs/bcachefs/quota.c:232
lr : bch2_quota_check_limit+0xb2c/0xb50 fs/bcachefs/quota.c:232
sp : ffff8000a4277290
x29: ffff8000a42772a0 x28: dfff800000000000 x27: 0000000000000001
x26: ffffffffffffffff x25: ffff0000ed000000 x24: ffffffffffffffff
x23: ffff0000c6728828 x22: 0000000000000000 x21: 0000000000000001
x20: 0000000000000001 x19: ffff8000a42773c0 x18: 00000000ffffffff
x17: ffff800093605000 x16: ffff80008b065bd0 x15: 0000000000000001
x14: 1ffff0001484ee00 x13: 0000000000000000 x12: 0000000000000000
x11: ffff70001484ee01 x10: 0000000000ff0100 x9 : 0000000000000000
x8 : ffff0000cb8c3d00 x7 : ffff800082a9bd30 x6 : 0000000000000001
x5 : ffffffffffffffff x4 : 0000000000000001 x3 : ffff8000a42773c0
x2 : ffff0000c6728800 x1 : ffffffffffffffff x0 : 0000000000000000
Call trace:
 bch2_quota_check_limit+0xb2c/0xb50 fs/bcachefs/quota.c:232 (P)
 bch2_quota_acct+0x360/0x6a4 fs/bcachefs/quota.c:299
 bch2_evict_inode+0x170/0x444 fs/bcachefs/fs.c:2180
 evict+0x414/0x928 fs/inode.c:810
 iput_final fs/inode.c:1897 [inline]
 iput+0x6e4/0x83c fs/inode.c:1923
 dentry_unlink_inode+0x384/0x45c fs/dcache.c:466
 __dentry_kill+0x170/0x594 fs/dcache.c:669
 dput+0x1b8/0x290 fs/dcache.c:911
 __fput+0x51c/0x75c fs/file_table.c:476
 ____fput+0x20/0x58 fs/file_table.c:496
 task_work_run+0x1dc/0x260 kernel/task_work.c:227
 exit_task_work include/linux/task_work.h:40 [inline]
 do_exit+0x524/0x1a14 kernel/exit.c:961
 do_group_exit+0x194/0x22c kernel/exit.c:1102
 get_signal+0x11dc/0x12f8 kernel/signal.c:3034
 arch_do_signal_or_restart+0x274/0x4434 arch/arm64/kernel/signal.c:1619
 exit_to_user_mode_loop+0x7c/0x168 kernel/entry/common.c:40
 exit_to_user_mode_prepare include/linux/irq-entry-common.h:225 [inline]
 arm64_exit_to_user_mode arch/arm64/kernel/entry-common.c:103 [inline]
 el0_svc+0x170/0x254 arch/arm64/kernel/entry-common.c:745
 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:763
 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596
Code: aa1303e0 9787203c 17fffed8 977264a4 (d4210000) 
---[ end trace 0000000000000000 ]---

Crashes (802):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2025/10/11 16:17 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci bf45a62baffc ff1712fe .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro] ci-upstream-gce-arm64 kernel BUG in bch2_quota_check_limit
2025/07/02 08:52 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 3c795c3404e8 ffe4b334 .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro] ci-upstream-gce-arm64 kernel BUG in bch2_quota_check_limit
2025/02/13 03:11 upstream 4dc1d1bec898 b27c2402 .config strace log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-upstream-fs kernel BUG in bch2_quota_check_limit
2025/09/27 18:31 upstream fec734e8d564 001c9061 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in bch2_quota_check_limit
2025/09/27 05:53 upstream 083fc6d7fa0d 001c9061 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in bch2_quota_check_limit
2025/09/26 10:15 upstream 4ff71af020ae 0abd0691 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in bch2_quota_check_limit
2025/09/26 03:10 upstream 4ff71af020ae 0abd0691 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in bch2_quota_check_limit
2025/09/25 06:47 upstream 4ea5af085908 0abd0691 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in bch2_quota_check_limit
2025/09/10 02:54 upstream 9dd1835ecda5 fdeaa69b .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in bch2_quota_check_limit
2025/09/04 20:31 upstream 08b06c30a445 d291dd2d .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in bch2_quota_check_limit
2025/08/30 01:37 upstream fb679c832b64 807a3b61 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in bch2_quota_check_limit
2025/08/19 17:51 upstream be48bcf004f9 523f460e .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in bch2_quota_check_limit
2025/07/16 10:56 upstream 155a3c003e55 124ec9cc .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in bch2_quota_check_limit
2025/07/06 02:55 upstream a79a588fc176 4f67c4ae .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in bch2_quota_check_limit
2025/02/13 02:49 upstream 4dc1d1bec898 2afad16e .config console log report syz / log C [disk image (non-bootable)] [vmlinux] [kernel image] [mounted in repro] ci-snapshot-upstream-root kernel BUG in bch2_quota_check_limit
2024/09/19 05:43 upstream 4a39ac5b7d62 c673ca06 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in bch2_quota_check_limit
2024/09/18 13:51 upstream 2f27fce67173 c673ca06 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in bch2_quota_check_limit
2025/10/11 15:20 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci bf45a62baffc ff1712fe .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 kernel BUG in bch2_quota_check_limit
2025/10/09 12:34 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci bf45a62baffc 7e2882b3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 kernel BUG in bch2_quota_check_limit
2025/10/07 20:22 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci bf45a62baffc 8ef35d49 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 kernel BUG in bch2_quota_check_limit
2025/10/07 01:30 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci bf45a62baffc 91305dbe .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 kernel BUG in bch2_quota_check_limit
2025/09/30 22:42 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 2213e57a69f0 65a0eece .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 kernel BUG in bch2_quota_check_limit
2025/09/22 08:48 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 506ba4ea4cf5 67c37560 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 kernel BUG in bch2_quota_check_limit
2025/09/19 05:28 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci c9d61056440c e2beed91 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 kernel BUG in bch2_quota_check_limit
2025/09/18 09:43 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 6edf2885ebeb e2beed91 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 kernel BUG in bch2_quota_check_limit
2025/09/18 07:48 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 6edf2885ebeb e2beed91 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 kernel BUG in bch2_quota_check_limit
2025/09/18 06:20 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 6edf2885ebeb e2beed91 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 kernel BUG in bch2_quota_check_limit
2025/09/16 04:59 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 8736259279a3 e2beed91 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 kernel BUG in bch2_quota_check_limit
2025/09/16 02:11 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 8736259279a3 e2beed91 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 kernel BUG in bch2_quota_check_limit
2025/09/15 07:06 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 8736259279a3 e2beed91 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 kernel BUG in bch2_quota_check_limit
2025/09/14 20:07 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 8736259279a3 e2beed91 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 kernel BUG in bch2_quota_check_limit
2025/09/13 22:06 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 8736259279a3 e2beed91 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 kernel BUG in bch2_quota_check_limit
2025/09/13 16:27 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 8736259279a3 e2beed91 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 kernel BUG in bch2_quota_check_limit
2025/09/13 10:58 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 8736259279a3 e2beed91 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 kernel BUG in bch2_quota_check_limit
2025/09/13 00:22 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 8736259279a3 e2beed91 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 kernel BUG in bch2_quota_check_limit
2025/09/11 07:05 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci c199ef1fa61a fdeaa69b .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 kernel BUG in bch2_quota_check_limit
2025/09/10 16:06 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci c199ef1fa61a fdeaa69b .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 kernel BUG in bch2_quota_check_limit
2025/09/09 20:10 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci c199ef1fa61a d291dd2d .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 kernel BUG in bch2_quota_check_limit
2025/09/08 10:33 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci b320789d6883 d291dd2d .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 kernel BUG in bch2_quota_check_limit
2025/09/07 15:42 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci b320789d6883 d291dd2d .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 kernel BUG in bch2_quota_check_limit
2025/09/06 15:11 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci b320789d6883 d291dd2d .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 kernel BUG in bch2_quota_check_limit
2025/09/06 09:28 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci b320789d6883 d291dd2d .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 kernel BUG in bch2_quota_check_limit
2025/09/06 07:16 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci b320789d6883 d291dd2d .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 kernel BUG in bch2_quota_check_limit
2025/09/06 06:13 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci b320789d6883 d291dd2d .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 kernel BUG in bch2_quota_check_limit
2025/09/01 15:04 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 8f5ae30d69d7 807a3b61 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 kernel BUG in bch2_quota_check_limit
2025/08/30 19:57 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 8f5ae30d69d7 807a3b61 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 kernel BUG in bch2_quota_check_limit
2025/08/25 16:29 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 8f5ae30d69d7 bf27483f .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 kernel BUG in bch2_quota_check_limit
2025/08/12 02:37 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 8f5ae30d69d7 32a0e5ed .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 kernel BUG in bch2_quota_check_limit
2025/07/26 21:37 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 82af5ea7c611 fb8f743d .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 kernel BUG in bch2_quota_check_limit
* Struck through repros no longer work on HEAD.