syzbot


kernel BUG in ocfs2_truncate_log_needs_flush (2)

Status: auto-obsoleted due to no activity on 2026/01/24 19:05
Subsystems: ocfs2
[Documentation on labels]
Reported-by: syzbot+c24237f0eee59c0c2abb@syzkaller.appspotmail.com
First crash: 212d, last: 114d
Discussions (1)
Title Replies (including bot) Last reply
[syzbot] [ocfs2?] kernel BUG in ocfs2_truncate_log_needs_flush (2) 0 (15) 2025/10/29 06:27
Similar bugs (3)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream kernel BUG in ocfs2_truncate_log_needs_flush ocfs2 -1 5 315d 497d 0/29 auto-obsoleted due to no activity on 2025/07/07 05:53
linux-5.15 kernel BUG in ocfs2_truncate_log_needs_flush -1 1 258d 258d 0/3 auto-obsoleted due to no activity on 2025/09/02 10:37
linux-6.1 kernel BUG in ocfs2_truncate_log_needs_flush -1 1 468d 468d 0/3 auto-obsoleted due to no activity on 2025/02/05 02:34
Last patch testing requests (24)
Created Duration User Patch Repo Result
2025/12/25 19:43 20m retest repro upstream OK log
2025/12/25 18:53 20m retest repro upstream OK log
2025/12/25 18:53 20m retest repro upstream OK log
2025/12/11 18:20 21m retest repro upstream OK log
2025/10/29 06:27 19m dmantipov@yandex.ru patch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git linux-6.12.y OK log
2025/10/29 06:25 18m dmantipov@yandex.ru patch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git linux-6.1.y OK log
2025/10/29 06:21 9m dmantipov@yandex.ru patch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git linux-5.10.y report log
2025/10/28 18:22 19m dmantipov@yandex.ru patch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git linux-6.12.y OK log
2025/10/28 18:21 6m dmantipov@yandex.ru patch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git linux-6.1.y error
2025/10/28 18:19 6m dmantipov@yandex.ru patch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git linux-5.10.y error
2025/10/28 10:42 0m dmantipov@yandex.ru patch https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git linux-6.12.y error
2025/10/28 10:41 0m dmantipov@yandex.ru patch https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git linux-6.1.y error
2025/10/28 10:40 0m dmantipov@yandex.ru patch https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git linux-5.10.y error
2025/10/24 07:15 20m dmantipov@yandex.ru patch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git linux-6.12.y OK log
2025/10/24 07:15 18m dmantipov@yandex.ru patch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git linux-6.1.y OK log
2025/10/24 07:11 8m dmantipov@yandex.ru patch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git linux-5.10.y error
2025/10/22 12:13 19m dmantipov@yandex.ru patch https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 552c50713f273b494ac6c77052032a49bc9255e2 OK log
2025/10/22 10:29 19m dmantipov@yandex.ru patch https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 552c50713f273b494ac6c77052032a49bc9255e2 OK log
2025/10/16 18:17 15m retest repro upstream report log
2025/10/16 18:17 15m retest repro upstream report log
2025/10/16 18:17 15m retest repro upstream report log
2025/10/02 18:01 13m retest repro upstream report log
2025/07/24 17:37 14m retest repro upstream report log
2025/07/24 17:37 14m retest repro upstream report log

Sample crash report:
capability: warning: `syz.0.0' uses deprecated v2 capabilities in a way that may be insecure
overlayfs: failed to create directory ./bus/work (errno: 13); mounting read-only
overlayfs: fs on './file0' does not support file handles, falling back to index=off,nfs_export=off.
(syz.0.0,5357,0):ocfs2_truncate_log_needs_flush:5830 ERROR: bug expression: le16_to_cpu(tl->tl_used) > le16_to_cpu(tl->tl_count)
(syz.0.0,5357,0):ocfs2_truncate_log_needs_flush:5830 ERROR: slot 0, invalid truncate log parameters: used = 1792, count = 39
------------[ cut here ]------------
kernel BUG at fs/ocfs2/alloc.c:5830!
Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI
CPU: 0 UID: 0 PID: 5357 Comm: syz.0.0 Not tainted 6.16.0-syzkaller-12288-g2b38afce25c4 #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
RIP: 0010:ocfs2_truncate_log_needs_flush+0x2d8/0x2e0 fs/ocfs2/alloc.c:5827
Code: 0f b7 00 4c 89 e7 48 c7 c6 e8 ce a8 8d ba c6 16 00 00 48 c7 c1 00 3f ca 8b 45 89 e8 45 89 f9 50 e8 fd 1d 1e 00 48 83 c4 08 90 <0f> 0b 66 0f 1f 44 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90
RSP: 0018:ffffc9000d4b7220 EFLAGS: 00010292
RAX: ad7d9c4ce0803b00 RBX: ffff888043364174 RCX: ad7d9c4ce0803b00
RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000
RBP: ffffc9000d4b72f0 R08: ffff88801fc24253 R09: 1ffff11003f8484a
R10: dffffc0000000000 R11: ffffed1003f8484b R12: ffffc9000d4b7280
R13: 0000000000000000 R14: 1ffff110085e3f58 R15: 0000000000000700
FS:  00007f4c8535c6c0(0000) GS:ffff88808d211000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000001000 CR3: 000000003fe80000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 ocfs2_xattr_set+0xaea/0x11f0 fs/ocfs2/xattr.c:3624
 __vfs_setxattr+0x43c/0x480 fs/xattr.c:200
 __vfs_setxattr_noperm+0x12d/0x660 fs/xattr.c:234
 vfs_setxattr+0x16b/0x2f0 fs/xattr.c:321
 ovl_do_setxattr fs/overlayfs/overlayfs.h:317 [inline]
 ovl_setxattr fs/overlayfs/overlayfs.h:329 [inline]
 ovl_init_uuid_xattr+0x53d/0x910 fs/overlayfs/util.c:834
 ovl_fill_super+0x2a48/0x35b0 fs/overlayfs/super.c:1430
 vfs_get_super fs/super.c:1325 [inline]
 get_tree_nodev+0xbb/0x150 fs/super.c:1344
 vfs_get_tree+0x8f/0x2b0 fs/super.c:1815
 do_new_mount+0x2a2/0x9e0 fs/namespace.c:3805
 do_mount fs/namespace.c:4133 [inline]
 __do_sys_mount fs/namespace.c:4344 [inline]
 __se_sys_mount+0x317/0x410 fs/namespace.c:4321
 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: 0033:0x7f4c8458ebe9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f4c8535c038 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f4c847b6090 RCX: 00007f4c8458ebe9
RDX: 0000200000000080 RSI: 00002000000000c0 RDI: 0000000000000000
RBP: 00007f4c84611e19 R08: 0000200000000400 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f4c847b6128 R14: 00007f4c847b6090 R15: 00007ffee4a1c188
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:ocfs2_truncate_log_needs_flush+0x2d8/0x2e0 fs/ocfs2/alloc.c:5827
Code: 0f b7 00 4c 89 e7 48 c7 c6 e8 ce a8 8d ba c6 16 00 00 48 c7 c1 00 3f ca 8b 45 89 e8 45 89 f9 50 e8 fd 1d 1e 00 48 83 c4 08 90 <0f> 0b 66 0f 1f 44 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90
RSP: 0018:ffffc9000d4b7220 EFLAGS: 00010292
RAX: ad7d9c4ce0803b00 RBX: ffff888043364174 RCX: ad7d9c4ce0803b00
RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000
RBP: ffffc9000d4b72f0 R08: ffff88801fc24253 R09: 1ffff11003f8484a
R10: dffffc0000000000 R11: ffffed1003f8484b R12: ffffc9000d4b7280
R13: 0000000000000000 R14: 1ffff110085e3f58 R15: 0000000000000700
FS:  00007f4c8535c6c0(0000) GS:ffff88808d211000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f4c787ff000 CR3: 000000003fe80000 CR4: 0000000000352ef0

Crashes (6):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2025/08/11 04:10 upstream 2b38afce25c4 32a0e5ed .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in ocfs2_truncate_log_needs_flush
2025/07/10 17:17 upstream 8c2e52ebbe88 d7384b6d .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_truncate_log_needs_flush
2025/07/10 16:22 upstream 8c2e52ebbe88 d7384b6d .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_truncate_log_needs_flush
2025/07/10 15:25 upstream 8c2e52ebbe88 d7384b6d .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_truncate_log_needs_flush
2025/07/10 14:29 upstream 8c2e52ebbe88 d7384b6d .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_truncate_log_needs_flush
2025/07/10 13:33 upstream 8c2e52ebbe88 d7384b6d .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in ocfs2_truncate_log_needs_flush
* Struck through repros no longer work on HEAD.