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kernel BUG in ocfs2_claim_suballoc_bits

Status: upstream: reported C repro on 2024/08/22 08:11
Subsystems: ocfs2
[Documentation on labels]
Reported-by: syzbot+96d38c6e1655c1420a72@syzkaller.appspotmail.com
First crash: 315d, last: 20h39m
Cause bisection: the issue happens on the oldest tested release (bisect log)
Crash: kernel BUG in ocfs2_claim_suballoc_bits (log)
Repro: C syz .config
  
▶ ▼ Discussions (1)
Title Replies (including bot) Last reply
[syzbot] [ocfs2?] kernel BUG in ocfs2_claim_suballoc_bits 0 (1) 2024/08/22 08:11
▶ ▼ Similar bugs (2)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-6.1 kernel BUG in ocfs2_claim_suballoc_bits origin:upstream C 20 16d 212d 0/3 upstream: reported C repro on 2024/12/02 23:45
linux-5.15 kernel BUG in ocfs2_claim_suballoc_bits origin:upstream C 31 10d 248d 0/3 upstream: reported C repro on 2024/10/28 07:17

Sample crash report:
ocfs2: Mounting device (7,0) on (node local, slot 0) with ordered data mode.
------------[ cut here ]------------
kernel BUG at fs/ocfs2/suballoc.c:1443!
Oops: invalid opcode: 0000 [#1] SMP KASAN PTI
CPU: 1 UID: 0 PID: 5826 Comm: syz-executor183 Not tainted 6.15.0-syzkaller-13804-g939f15e640f1 #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
RIP: 0010:ocfs2_find_victim_chain fs/ocfs2/suballoc.c:1443 [inline]
RIP: 0010:ocfs2_claim_suballoc_bits+0x243c/0x2450 fs/ocfs2/suballoc.c:1996
Code: c2 fb ff ff e8 85 42 1c fe 90 0f 0b e8 7d 42 1c fe 90 0f 0b e8 75 42 1c fe 90 0f 0b e8 6d 42 1c fe 90 0f 0b e8 65 42 1c fe 90 <0f> 0b e8 5d 42 1c fe 90 0f 0b 66 2e 0f 1f 84 00 00 00 00 00 90 90
RSP: 0018:ffffc900042dee80 EFLAGS: 00010293
RAX: ffffffff83a40b8b RBX: 0000000000000000 RCX: ffff88802ca45a00
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc900042df110 R08: ffffc900042df1a0 R09: 0000000000000003
R10: 0000000000000005 R11: 0000000000000000 R12: ffff888142af0e08
R13: dffffc0000000000 R14: 0000000000000000 R15: 1ffff1102855e1c1
FS:  000055558e0f1380(0000) GS:ffff888125d86000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f12c1b8dd30 CR3: 0000000034df2000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 __ocfs2_claim_clusters+0x303/0x8f0 fs/ocfs2/suballoc.c:2421
 ocfs2_local_alloc_new_window fs/ocfs2/localalloc.c:1166 [inline]
 ocfs2_local_alloc_slide_window fs/ocfs2/localalloc.c:1295 [inline]
 ocfs2_reserve_local_alloc_bits+0x12be/0x24e0 fs/ocfs2/localalloc.c:669
 ocfs2_reserve_clusters_with_limit+0x1be/0xba0 fs/ocfs2/suballoc.c:1168
 ocfs2_mknod+0xe32/0x2050 fs/ocfs2/namei.c:354
 ocfs2_mkdir+0x191/0x440 fs/ocfs2/namei.c:656
 vfs_mkdir+0x306/0x510 fs/namei.c:4366
 do_mkdirat+0x247/0x590 fs/namei.c:4399
 __do_sys_mkdirat fs/namei.c:4416 [inline]
 __se_sys_mkdirat fs/namei.c:4414 [inline]
 __x64_sys_mkdirat+0x87/0xa0 fs/namei.c:4414
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fcd324a4a99
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 17 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 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffd36fcc358 EFLAGS: 00000206 ORIG_RAX: 0000000000000102
RAX: ffffffffffffffda RBX: 0030656c69662f2e RCX: 00007fcd324a4a99
RDX: 0000000000000081 RSI: 0000200000000000 RDI: 00000000ffffff9c
RBP: 00007fcd3251c5f0 R08: 0000000000004446 R09: 000055558e0f24c0
R10: 00007ffd36fcc220 R11: 0000000000000206 R12: 00007ffd36fcc380
R13: 00007ffd36fcc5a8 R14: 431bde82d7b634db R15: 00007fcd324ed03b
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:ocfs2_find_victim_chain fs/ocfs2/suballoc.c:1443 [inline]
RIP: 0010:ocfs2_claim_suballoc_bits+0x243c/0x2450 fs/ocfs2/suballoc.c:1996
Code: c2 fb ff ff e8 85 42 1c fe 90 0f 0b e8 7d 42 1c fe 90 0f 0b e8 75 42 1c fe 90 0f 0b e8 6d 42 1c fe 90 0f 0b e8 65 42 1c fe 90 <0f> 0b e8 5d 42 1c fe 90 0f 0b 66 2e 0f 1f 84 00 00 00 00 00 90 90
RSP: 0018:ffffc900042dee80 EFLAGS: 00010293
RAX: ffffffff83a40b8b RBX: 0000000000000000 RCX: ffff88802ca45a00
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc900042df110 R08: ffffc900042df1a0 R09: 0000000000000003
R10: 0000000000000005 R11: 0000000000000000 R12: ffff888142af0e08
R13: dffffc0000000000 R14: 0000000000000000 R15: 1ffff1102855e1c1
FS:  000055558e0f1380(0000) GS:ffff888125d86000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f12c1b8dd30 CR3: 0000000034df2000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400

Crashes (1280):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2025/06/08 22:27 upstream 939f15e640f1 4826c28e .config strace log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro (clean fs)] ci2-upstream-fs kernel BUG in ocfs2_claim_suballoc_bits
2025/05/24 19:38 upstream b1427432d3b6 ed351ea7 .config strace log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro (clean fs)] ci2-upstream-fs kernel BUG in ocfs2_claim_suballoc_bits
2025/02/08 20:05 upstream 8f6629c004b1 ef44b750 .config strace log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro (clean fs)] ci2-upstream-fs kernel BUG in ocfs2_claim_suballoc_bits
2024/11/12 02:12 upstream 2d5404caa8c7 75bb1b32 .config strace log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-upstream-fs kernel BUG in ocfs2_claim_suballoc_bits
2025/06/08 17:50 upstream 8630c59e9936 4826c28e .config console log report syz / log C [disk image (non-bootable)] [vmlinux] [kernel image] [mounted in repro (clean fs)] ci-snapshot-upstream-root kernel BUG in ocfs2_claim_suballoc_bits
2025/05/24 18:15 upstream 4856ebd99715 ed351ea7 .config console log report syz / log C [disk image (non-bootable)] [vmlinux] [kernel image] [mounted in repro (clean fs)] ci-snapshot-upstream-root kernel BUG in ocfs2_claim_suballoc_bits
2025/02/13 16:13 upstream 4dc1d1bec898 7320a65f .config console log report syz / log C [disk image (non-bootable)] [vmlinux] [kernel image] [mounted in repro (corrupt fs)] ci-snapshot-upstream-root kernel BUG in ocfs2_claim_suballoc_bits
2024/08/22 10:21 upstream 872cf28b8df9 ca02180f .config console log report syz / log C [disk image (non-bootable)] [vmlinux] [kernel image] [mounted in repro] ci-snapshot-upstream-root kernel BUG in ocfs2_claim_suballoc_bits
2024/08/22 08:45 upstream 872cf28b8df9 ca02180f .config console log report syz / log C [disk image (non-bootable)] [vmlinux] [kernel image] [mounted in repro] ci-snapshot-upstream-root kernel BUG in ocfs2_claim_suballoc_bits
2024/08/22 06:26 upstream 872cf28b8df9 ca02180f .config console log report syz / log C [disk image (non-bootable)] [vmlinux] [kernel image] [mounted in repro] ci-snapshot-upstream-root kernel BUG in ocfs2_claim_suballoc_bits
2025/06/04 02:00 linux-next a0bea9e39035 a30356b7 .config strace log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro (clean fs)] ci-upstream-linux-next-kasan-gce-root kernel BUG in ocfs2_claim_suballoc_bits
2025/05/03 05:59 upstream 2bfcee565c3a b0714e37 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root kernel BUG in ocfs2_claim_suballoc_bits
2025/07/02 20:56 upstream b4911fb0b060 0cd59a8f .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in ocfs2_claim_suballoc_bits
2025/07/02 15:19 upstream 66701750d556 0cd59a8f .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in ocfs2_claim_suballoc_bits
2025/07/02 09:53 upstream 66701750d556 bc80e4f0 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in ocfs2_claim_suballoc_bits
2025/06/30 22:16 upstream d0b3b7b22dfa 6e83b42d .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in ocfs2_claim_suballoc_bits
2025/06/30 01:28 upstream afa9a6f4f574 fc9d8ee5 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in ocfs2_claim_suballoc_bits
2025/06/29 16:34 upstream dfba48a70cb6 fc9d8ee5 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in ocfs2_claim_suballoc_bits
2025/06/28 16:53 upstream aaf724ed6926 fc9d8ee5 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in ocfs2_claim_suballoc_bits
2025/06/28 09:20 upstream 35e261cd95dd fc9d8ee5 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in ocfs2_claim_suballoc_bits
2025/06/28 05:14 upstream 35e261cd95dd fc9d8ee5 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in ocfs2_claim_suballoc_bits
2025/06/27 08:21 upstream f02769e7f272 803ce19b .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in ocfs2_claim_suballoc_bits
2025/06/26 22:57 upstream ee88bddf7f2f 1ae8177e .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in ocfs2_claim_suballoc_bits
2025/06/26 19:09 upstream ee88bddf7f2f 1ae8177e .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in ocfs2_claim_suballoc_bits
2025/06/26 16:45 upstream ee88bddf7f2f 1ae8177e .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in ocfs2_claim_suballoc_bits
2025/06/25 17:57 upstream 7595b66ae9de 26d77996 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in ocfs2_claim_suballoc_bits
2025/06/25 15:30 upstream 7595b66ae9de 26d77996 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in ocfs2_claim_suballoc_bits
2025/06/25 07:15 upstream 7595b66ae9de 26d77996 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in ocfs2_claim_suballoc_bits
2025/06/24 22:39 upstream 78f4e737a53e 26d77996 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in ocfs2_claim_suballoc_bits
2025/06/23 02:49 upstream b67ec639010f d6cdfb8a .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in ocfs2_claim_suballoc_bits
2025/06/22 18:11 upstream 739a6c93cc75 d6cdfb8a .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in ocfs2_claim_suballoc_bits
2025/06/21 19:25 upstream 3f75bfff44be d6cdfb8a .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in ocfs2_claim_suballoc_bits
2025/06/21 10:35 upstream 11313e2f7812 d6cdfb8a .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in ocfs2_claim_suballoc_bits
2025/06/21 05:11 upstream 11313e2f7812 d6cdfb8a .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in ocfs2_claim_suballoc_bits
2025/06/20 17:00 upstream 41687a5c6f8b 804b3919 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in ocfs2_claim_suballoc_bits
2025/06/20 10:04 upstream 41687a5c6f8b ed3e87f7 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in ocfs2_claim_suballoc_bits
2025/06/19 23:02 upstream 24770983ccfe ed3e87f7 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in ocfs2_claim_suballoc_bits
2025/06/19 21:53 upstream 24770983ccfe ed3e87f7 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in ocfs2_claim_suballoc_bits
2025/06/19 02:13 upstream 52da431bf03b ed3e87f7 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in ocfs2_claim_suballoc_bits
2025/06/19 00:33 upstream 52da431bf03b ed3e87f7 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in ocfs2_claim_suballoc_bits
2025/06/18 23:11 upstream 52da431bf03b ed3e87f7 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in ocfs2_claim_suballoc_bits
2025/06/18 15:54 upstream 52da431bf03b ed3e87f7 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in ocfs2_claim_suballoc_bits
2025/06/15 00:58 upstream 4774cfe3543a 5f4b362d .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in ocfs2_claim_suballoc_bits
2025/06/14 23:51 upstream 4774cfe3543a 5f4b362d .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in ocfs2_claim_suballoc_bits
2025/06/14 11:03 upstream 18531f4d1c8c 0e8da31f .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in ocfs2_claim_suballoc_bits
2025/06/12 13:51 upstream 2c4a1f3fe03e 98683f8f .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in ocfs2_claim_suballoc_bits
2025/06/12 02:32 upstream 488ef3560196 98683f8f .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in ocfs2_claim_suballoc_bits
2025/06/11 08:02 upstream aef17cb3d3c4 5d7e17ca .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in ocfs2_claim_suballoc_bits
2025/06/11 00:24 upstream f09079bd04a9 5d7e17ca .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in ocfs2_claim_suballoc_bits
2025/06/10 19:28 upstream f09079bd04a9 5d7e17ca .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in ocfs2_claim_suballoc_bits
2025/06/09 14:41 upstream 19272b37aa4f 4826c28e .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in ocfs2_claim_suballoc_bits
2025/06/09 13:14 upstream 19272b37aa4f 4826c28e .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in ocfs2_claim_suballoc_bits
2025/06/07 14:32 upstream bdc7f8c5adad 4826c28e .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in ocfs2_claim_suballoc_bits
2025/06/05 22:51 upstream ec7714e49479 6b6b5f21 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in ocfs2_claim_suballoc_bits
2025/06/05 18:23 upstream ec7714e49479 6b6b5f21 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in ocfs2_claim_suballoc_bits
2025/06/05 13:45 upstream ec7714e49479 6b6b5f21 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in ocfs2_claim_suballoc_bits
2025/06/05 04:35 upstream 1af80d00e1e0 6b6b5f21 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in ocfs2_claim_suballoc_bits
2025/06/03 21:22 upstream 546b1c9e93c2 a30356b7 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in ocfs2_claim_suballoc_bits
2025/06/03 19:34 upstream 546b1c9e93c2 a30356b7 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in ocfs2_claim_suballoc_bits
2025/06/29 01:04 linux-next 2aeda9592360 fc9d8ee5 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root kernel BUG in ocfs2_claim_suballoc_bits
2025/06/30 11:26 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 9aa9b43d689e fc9d8ee5 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 kernel BUG in ocfs2_claim_suballoc_bits
2025/06/29 19:17 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 9aa9b43d689e fc9d8ee5 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 kernel BUG in ocfs2_claim_suballoc_bits
2025/06/25 05:52 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 9aa9b43d689e 26d77996 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 kernel BUG in ocfs2_claim_suballoc_bits
* Struck through repros no longer work on HEAD.