syzbot


kernel BUG in txLock (2)

Status: upstream: reported C repro on 2024/11/25 09:43
Bug presence: origin:upstream
[Documentation on labels]
Reported-by: syzbot+e6e2bba5438f57dd796a@syzkaller.appspotmail.com
First crash: 26d, last: 3d21h
Bug presence (1)
Date Name Commit Repro Result
2024/11/26 upstream (ToT) 9f16d5e6f220 C [report] kernel BUG in txLock
Similar bugs (3)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-5.15 kernel BUG in txLock 1 471d 471d 0/3 auto-obsoleted due to no activity on 2023/12/16 09:17
upstream kernel BUG in txLock (2) jfs C error 4 27d 268d 0/28 upstream: reported C repro on 2024/03/28 08:26
upstream kernel BUG in txLock jfs C inconclusive done 10 351d 469d 25/28 fixed on 2024/02/16 19:40
Last patch testing requests (2)
Created Duration User Patch Repo Result
2024/12/17 17:58 10m retest repro linux-5.15.y report log
2024/12/17 17:58 9m retest repro linux-5.15.y report log

Sample crash report:
Locker's tblock: ffffc900023e1320: 00000004 0000001c 00000007 00000000
Tlock: ffffc900026020d8: 00010004 20208040 75ed13e0 ffff8880
Tlock: ffffc900026020e8: 70290d70 ffff8880 03140000 05002000
Tlock: ffffc900026020f8: 06030a00 0000020d 00000000 00000000
Tlock: ffffc90002602108: 00000000 00000000 00000000 00000000
Tlock: ffffc90002602118: 00000000 00000000
------------[ cut here ]------------
kernel BUG at fs/jfs/jfs_txnmgr.c:834!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 4166 Comm: syz-executor587 Not tainted 5.15.173-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
RIP: 0010:txLock+0x1b17/0x1b30 fs/jfs/jfs_txnmgr.c:834
Code: e2 8a 48 c7 c6 00 67 e2 8a ba 01 00 00 00 b9 10 00 00 00 41 b8 04 00 00 00 4c 8b 0c 24 6a 00 6a 48 e8 4d b0 23 01 48 83 c4 10 <0f> 0b e8 b2 3a 90 fe 4c 89 ef 48 c7 c6 60 6d e2 8a e8 c3 8c c6 fe
RSP: 0018:ffffc90002d0ef78 EFLAGS: 00010286
RAX: 98ccb3587c563a00 RBX: 0000000000000010 RCX: ffff8880276f8000
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: 0000000000000002 R08: ffffffff81669a1c R09: fffff520005a1cf9
R10: 0000000000000000 R11: dffffc0000000001 R12: ffffc90002602000
R13: 000000000000001b R14: ffffc900026020da R15: 1ffff920004c041b
FS:  00007fad84d2c6c0(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fad84d0bd58 CR3: 000000001fbdb000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 dtSplitRoot+0x42c/0x1920 fs/jfs/jfs_dtree.c:1924
 dtSplitUp fs/jfs/jfs_dtree.c:990 [inline]
 dtInsert+0x12f6/0x6b00 fs/jfs/jfs_dtree.c:868
 jfs_create+0x7b2/0xbb0 fs/jfs/namei.c:137
 lookup_open fs/namei.c:3462 [inline]
 open_last_lookups fs/namei.c:3532 [inline]
 path_openat+0x130a/0x2f20 fs/namei.c:3739
 do_filp_open+0x21c/0x460 fs/namei.c:3769
 do_sys_openat2+0x13b/0x4f0 fs/open.c:1253
 do_sys_open fs/open.c:1269 [inline]
 __do_sys_open fs/open.c:1277 [inline]
 __se_sys_open fs/open.c:1273 [inline]
 __x64_sys_open+0x221/0x270 fs/open.c:1273
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7fad84d6f849
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 81 18 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 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fad84d2c218 EFLAGS: 00000246 ORIG_RAX: 0000000000000002
RAX: ffffffffffffffda RBX: 00007fad84dfc6c8 RCX: 00007fad84d6f849
RDX: 0000000000000000 RSI: 0000000000000040 RDI: 0000000020000400
RBP: 00007fad84dfc6c0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fad84dc307e
R13: 0030656c69662f2e R14: 7261637369646f6e R15: 6573726168636f69
 </TASK>
Modules linked in:
---[ end trace 76b13fc1ede0059a ]---
RIP: 0010:txLock+0x1b17/0x1b30 fs/jfs/jfs_txnmgr.c:834
Code: e2 8a 48 c7 c6 00 67 e2 8a ba 01 00 00 00 b9 10 00 00 00 41 b8 04 00 00 00 4c 8b 0c 24 6a 00 6a 48 e8 4d b0 23 01 48 83 c4 10 <0f> 0b e8 b2 3a 90 fe 4c 89 ef 48 c7 c6 60 6d e2 8a e8 c3 8c c6 fe
RSP: 0018:ffffc90002d0ef78 EFLAGS: 00010286
RAX: 98ccb3587c563a00 RBX: 0000000000000010 RCX: ffff8880276f8000
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: 0000000000000002 R08: ffffffff81669a1c R09: fffff520005a1cf9
R10: 0000000000000000 R11: dffffc0000000001 R12: ffffc90002602000
R13: 000000000000001b R14: ffffc900026020da R15: 1ffff920004c041b
FS:  00007fad84d2c6c0(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fad84d0bd58 CR3: 000000001fbdb000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400

Crashes (2):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2024/12/02 00:45 linux-5.15.y 0a51d2d4527b 68914665 .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-5-15-kasan kernel BUG in txLock
2024/11/25 09:42 linux-5.15.y 0a51d2d4527b 68da6d95 .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-5-15-kasan kernel BUG in txLock
* Struck through repros no longer work on HEAD.