syzbot


kernel BUG in ocfs2_truncate_log_needs_flush

Status: upstream: reported on 2024/09/28 19:49
Subsystems: ocfs2
[Documentation on labels]
Reported-by: syzbot+e1e7130b99d8a4ac02e4@syzkaller.appspotmail.com
First crash: 17d, last: 5d10h
Discussions (1)
Title Replies (including bot) Last reply
[syzbot] [ocfs2?] kernel BUG in ocfs2_truncate_log_needs_flush 0 (1) 2024/09/28 19:49

Sample crash report:
loop0: detected capacity change from 0 to 32768
=======================================================
WARNING: The mand mount option has been deprecated and
         and is ignored by this kernel. Remove the mand
         option from the mount to silence this warning.
=======================================================
ocfs2: Mounting device (7,0) on (node local, slot 0) with writeback data mode.
(syz.0.0,5106,0):ocfs2_truncate_log_needs_flush:5822 ERROR: bug expression: le16_to_cpu(tl->tl_used) > le16_to_cpu(tl->tl_count)
(syz.0.0,5106,0):ocfs2_truncate_log_needs_flush:5822 ERROR: slot 0, invalid truncate log parameters: used = 512, count = 39
------------[ cut here ]------------
kernel BUG at fs/ocfs2/alloc.c:5822!
Oops: invalid opcode: 0000 [#1] PREEMPT SMP KASAN NOPTI
CPU: 0 UID: 0 PID: 5106 Comm: syz.0.0 Not tainted 6.12.0-rc1-syzkaller-00381-g2a130b7e1fcd #0
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+0x312/0x320 fs/ocfs2/alloc.c:5819
Code: 0f b7 00 4c 89 f7 48 c7 c6 69 d6 11 8e ba be 16 00 00 48 c7 c1 60 11 49 8c 45 89 e0 41 89 d9 50 e8 d3 ab 20 00 48 83 c4 08 90 <0f> 0b e8 27 89 42 08 0f 1f 80 00 00 00 00 90 90 90 90 90 90 90 90
RSP: 0018:ffffc9000303f540 EFLAGS: 00010292
RAX: 83f024a540c45c00 RBX: 0000000000000200 RCX: 83f024a540c45c00
RDX: ffffc9000b3f1000 RSI: 0000000000001211 RDI: 0000000000001212
RBP: ffffc9000303f610 R08: ffffffff8174af0c R09: 1ffff92000607e18
R10: dffffc0000000000 R11: fffff52000607e19 R12: 0000000000000000
R13: ffff88804ca4cac2 R14: ffffc9000303f5a0 R15: 1000000000000000
FS:  00007f052b8ac6c0(0000) GS:ffff88801fc00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f052a9fef98 CR3: 0000000012ea4000 CR4: 0000000000352ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 ocfs2_xattr_set+0xeab/0x1930 fs/ocfs2/xattr.c:3625
 __vfs_setxattr+0x468/0x4a0 fs/xattr.c:200
 __vfs_setxattr_noperm+0x12e/0x660 fs/xattr.c:234
 vfs_setxattr+0x221/0x430 fs/xattr.c:321
 do_setxattr fs/xattr.c:629 [inline]
 path_setxattr+0x37e/0x4d0 fs/xattr.c:658
 __do_sys_lsetxattr fs/xattr.c:683 [inline]
 __se_sys_lsetxattr fs/xattr.c:679 [inline]
 __x64_sys_lsetxattr+0xb8/0xd0 fs/xattr.c:679
 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: 0033:0x7f052ab7dff9
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:00007f052b8ac038 EFLAGS: 00000246 ORIG_RAX: 00000000000000bd
RAX: ffffffffffffffda RBX: 00007f052ad35f80 RCX: 00007f052ab7dff9
RDX: 0000000000000000 RSI: 00000000200002c0 RDI: 0000000020000280
RBP: 00007f052abf0296 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f052ad35f80 R15: 00007ffd15af3678
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:ocfs2_truncate_log_needs_flush+0x312/0x320 fs/ocfs2/alloc.c:5819
Code: 0f b7 00 4c 89 f7 48 c7 c6 69 d6 11 8e ba be 16 00 00 48 c7 c1 60 11 49 8c 45 89 e0 41 89 d9 50 e8 d3 ab 20 00 48 83 c4 08 90 <0f> 0b e8 27 89 42 08 0f 1f 80 00 00 00 00 90 90 90 90 90 90 90 90
RSP: 0018:ffffc9000303f540 EFLAGS: 00010292
RAX: 83f024a540c45c00 RBX: 0000000000000200 RCX: 83f024a540c45c00
RDX: ffffc9000b3f1000 RSI: 0000000000001211 RDI: 0000000000001212
RBP: ffffc9000303f610 R08: ffffffff8174af0c R09: 1ffff92000607e18
R10: dffffc0000000000 R11: fffff52000607e19 R12: 0000000000000000
R13: ffff88804ca4cac2 R14: ffffc9000303f5a0 R15: 1000000000000000
FS:  00007f052b8ac6c0(0000) GS:ffff88801fc00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f051ffff000 CR3: 0000000012ea4000 CR4: 0000000000352ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400

Crashes (3):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2024/10/07 08:39 upstream 2a130b7e1fcd d7906eff .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in ocfs2_truncate_log_needs_flush
2024/09/30 18:13 upstream 9852d85ec9d4 179f4029 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in ocfs2_truncate_log_needs_flush
2024/09/24 19:39 upstream abf2050f51fd 5643e0e9 .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.