[v6.6] INFO: trying to register non-static key in txEnd
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syzbot
Jul 7, 2025, 6:29:32 PM7/7/25
to syzkaller...@googlegroups.com
Hello,
syzbot found the following issue on:
HEAD commit: a5df3a702b2c Linux 6.6.96
git tree: linux-6.6.y
console output: https://syzkaller.appspot.com/x/log.txt?x=116a2bd4580000
kernel config: https://syzkaller.appspot.com/x/.config?x=2632deddafa957e8
dashboard link: https://syzkaller.appspot.com/bug?extid=5136e06b0767f2c4b1e5
compiler: Debian clang version 20.1.7 (++20250616065708+6146a88f6049-1~exp1~20250616065826.132), Debian LLD 20.1.7
Unfortunately, I don't have any reproducer for this issue yet.
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/9ba5b19f9f4d/disk-a5df3a70.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/2cd779015729/vmlinux-a5df3a70.xz
kernel image: https://storage.googleapis.com/syzbot-assets/b56fc39e5cb8/bzImage-a5df3a70.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+5136e0...@syzkaller.appspotmail.com
ERROR: (device loop5): remounting filesystem as read-only
jfs_dirty_inode called on read-only volume
Is remount racy?
jfs_dirty_inode called on read-only volume
Is remount racy?
jfs_dirty_inode called on read-only volume
Is remount racy?
INFO: trying to register non-static key.
The code is fine but needs lockdep annotation, or maybe
you didn't initialize this object before use?
turning off the locking correctness validator.
CPU: 0 PID: 6644 Comm: syz.5.110 Not tainted 6.6.96-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
Call Trace:
<TASK>
dump_stack_lvl+0x16c/0x230 lib/dump_stack.c:106
assign_lock_key+0x1f9/0x230 kernel/locking/lockdep.c:976
register_lock_class+0x212/0x890 kernel/locking/lockdep.c:1289
__lock_acquire+0x17a/0x7c80 kernel/locking/lockdep.c:5014
lock_acquire+0x197/0x410 kernel/locking/lockdep.c:5754
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
_raw_spin_lock_irqsave+0xa8/0xf0 kernel/locking/spinlock.c:162
__wake_up_common_lock kernel/sched/wait.c:137 [inline]
__wake_up+0xf8/0x190 kernel/sched/wait.c:160
txEnd+0x8a/0x520 fs/jfs/jfs_txnmgr.c:504
jfs_truncate_nolock+0x1e5/0x2c0 fs/jfs/inode.c:400
jfs_truncate+0xce/0x140 fs/jfs/inode.c:412
jfs_setattr+0x4f8/0x750 fs/jfs/file.c:119
notify_change+0xb0d/0xe10 fs/attr.c:499
do_truncate+0x19b/0x220 fs/open.c:66
handle_truncate fs/namei.c:3291 [inline]
do_open fs/namei.c:3636 [inline]
path_openat+0x298c/0x3190 fs/namei.c:3789
do_filp_open+0x1c5/0x3d0 fs/namei.c:3816
do_sys_openat2+0x12c/0x1c0 fs/open.c:1419
do_sys_open fs/open.c:1434 [inline]
__do_sys_openat fs/open.c:1450 [inline]
__se_sys_openat fs/open.c:1445 [inline]
__x64_sys_openat+0x139/0x160 fs/open.c:1445
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:81
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7fefa6f8e929
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:00007fefa7edb038 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007fefa71b5fa0 RCX: 00007fefa6f8e929
RDX: 00000000000c0342 RSI: 0000200000000100 RDI: ffffffffffffff9c
RBP: 00007fefa7010b39 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000000001ff R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fefa71b5fa0 R15: 00007ffe88d70b38
</TASK>
general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007]
CPU: 0 PID: 6644 Comm: syz.5.110 Not tainted 6.6.96-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
RIP: 0010:__wake_up_common+0x23c/0x4e0 kernel/sched/wait.c:100
Code: 24 00 00 00 00 49 83 c5 40 4d 39 ef 0f 84 ed 01 00 00 45 31 f6 eb 09 4d 39 ef 0f 84 df 01 00 00 4c 89 fd 4c 89 f8 48 c1 e8 03 <80> 3c 10 00 74 12 48 89 ef e8 46 df 79 00 48 ba 00 00 00 00 00 fc
RSP: 0018:ffffc9000b21f538 EFLAGS: 00010046
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: dffffc0000000000 RSI: 0000000000000003 RDI: ffffc90002649030
RBP: 0000000000000000 R08: 0000000000000000 R09: ffffc9000b21f5e0
R10: dffffc0000000000 R11: fffff52001643e90 R12: ffffc90002649030
R13: ffffc90002649070 R14: 0000000000000000 R15: 0000000000000000
FS: 00007fefa7edb6c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f25d8ceae9c CR3: 00000000763d7000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<TASK>
__wake_up_common_lock kernel/sched/wait.c:138 [inline]
__wake_up+0x112/0x190 kernel/sched/wait.c:160
txEnd+0x8a/0x520 fs/jfs/jfs_txnmgr.c:504
jfs_truncate_nolock+0x1e5/0x2c0 fs/jfs/inode.c:400
jfs_truncate+0xce/0x140 fs/jfs/inode.c:412
jfs_setattr+0x4f8/0x750 fs/jfs/file.c:119
notify_change+0xb0d/0xe10 fs/attr.c:499
do_truncate+0x19b/0x220 fs/open.c:66
handle_truncate fs/namei.c:3291 [inline]
do_open fs/namei.c:3636 [inline]
path_openat+0x298c/0x3190 fs/namei.c:3789
do_filp_open+0x1c5/0x3d0 fs/namei.c:3816
do_sys_openat2+0x12c/0x1c0 fs/open.c:1419
do_sys_open fs/open.c:1434 [inline]
__do_sys_openat fs/open.c:1450 [inline]
__se_sys_openat fs/open.c:1445 [inline]
__x64_sys_openat+0x139/0x160 fs/open.c:1445
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:81
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7fefa6f8e929
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:00007fefa7edb038 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007fefa71b5fa0 RCX: 00007fefa6f8e929
RDX: 00000000000c0342 RSI: 0000200000000100 RDI: ffffffffffffff9c
RBP: 00007fefa7010b39 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000000001ff R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fefa71b5fa0 R15: 00007ffe88d70b38
</TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:__wake_up_common+0x23c/0x4e0 kernel/sched/wait.c:100
Code: 24 00 00 00 00 49 83 c5 40 4d 39 ef 0f 84 ed 01 00 00 45 31 f6 eb 09 4d 39 ef 0f 84 df 01 00 00 4c 89 fd 4c 89 f8 48 c1 e8 03 <80> 3c 10 00 74 12 48 89 ef e8 46 df 79 00 48 ba 00 00 00 00 00 fc
RSP: 0018:ffffc9000b21f538 EFLAGS: 00010046
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: dffffc0000000000 RSI: 0000000000000003 RDI: ffffc90002649030
RBP: 0000000000000000 R08: 0000000000000000 R09: ffffc9000b21f5e0
R10: dffffc0000000000 R11: fffff52001643e90 R12: ffffc90002649030
R13: ffffc90002649070 R14: 0000000000000000 R15: 0000000000000000
FS: 00007fefa7edb6c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f25d8ceae9c CR3: 00000000763d7000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess), 1 bytes skipped:
0: 00 00 add %al,(%rax)
2: 00 00 add %al,(%rax)
4: 49 83 c5 40 add $0x40,%r13
8: 4d 39 ef cmp %r13,%r15
b: 0f 84 ed 01 00 00 je 0x1fe
11: 45 31 f6 xor %r14d,%r14d
14: eb 09 jmp 0x1f
16: 4d 39 ef cmp %r13,%r15
19: 0f 84 df 01 00 00 je 0x1fe
1f: 4c 89 fd mov %r15,%rbp
22: 4c 89 f8 mov %r15,%rax
25: 48 c1 e8 03 shr $0x3,%rax
* 29: 80 3c 10 00 cmpb $0x0,(%rax,%rdx,1) <-- trapping instruction
2d: 74 12 je 0x41
2f: 48 89 ef mov %rbp,%rdi
32: e8 46 df 79 00 call 0x79df7d
37: 48 rex.W
38: ba 00 00 00 00 mov $0x0,%edx
3d: 00 fc add %bh,%ah
---
This report is generated by a bot. It may contain errors.
See https://goo.gl/tpsmEJ for more information about syzbot.
syzbot engineers can be reached at syzk...@googlegroups.com.
syzbot will keep track of this issue. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
If the report is already addressed, let syzbot know by replying with:
#syz fix: exact-commit-title
If you want to overwrite report's subsystems, reply with:
#syz set subsystems: new-subsystem
(See the list of subsystem names on the web dashboard)
If the report is a duplicate of another one, reply with:
#syz dup: exact-subject-of-another-report
If you want to undo deduplication, reply with:
#syz undup
syzbot found the following issue on:
HEAD commit: a5df3a702b2c Linux 6.6.96
git tree: linux-6.6.y
console output: https://syzkaller.appspot.com/x/log.txt?x=116a2bd4580000
kernel config: https://syzkaller.appspot.com/x/.config?x=2632deddafa957e8
dashboard link: https://syzkaller.appspot.com/bug?extid=5136e06b0767f2c4b1e5
compiler: Debian clang version 20.1.7 (++20250616065708+6146a88f6049-1~exp1~20250616065826.132), Debian LLD 20.1.7
Unfortunately, I don't have any reproducer for this issue yet.
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/9ba5b19f9f4d/disk-a5df3a70.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/2cd779015729/vmlinux-a5df3a70.xz
kernel image: https://storage.googleapis.com/syzbot-assets/b56fc39e5cb8/bzImage-a5df3a70.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+5136e0...@syzkaller.appspotmail.com
ERROR: (device loop5): remounting filesystem as read-only
jfs_dirty_inode called on read-only volume
Is remount racy?
jfs_dirty_inode called on read-only volume
Is remount racy?
jfs_dirty_inode called on read-only volume
Is remount racy?
INFO: trying to register non-static key.
The code is fine but needs lockdep annotation, or maybe
you didn't initialize this object before use?
turning off the locking correctness validator.
CPU: 0 PID: 6644 Comm: syz.5.110 Not tainted 6.6.96-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
Call Trace:
<TASK>
dump_stack_lvl+0x16c/0x230 lib/dump_stack.c:106
assign_lock_key+0x1f9/0x230 kernel/locking/lockdep.c:976
register_lock_class+0x212/0x890 kernel/locking/lockdep.c:1289
__lock_acquire+0x17a/0x7c80 kernel/locking/lockdep.c:5014
lock_acquire+0x197/0x410 kernel/locking/lockdep.c:5754
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
_raw_spin_lock_irqsave+0xa8/0xf0 kernel/locking/spinlock.c:162
__wake_up_common_lock kernel/sched/wait.c:137 [inline]
__wake_up+0xf8/0x190 kernel/sched/wait.c:160
txEnd+0x8a/0x520 fs/jfs/jfs_txnmgr.c:504
jfs_truncate_nolock+0x1e5/0x2c0 fs/jfs/inode.c:400
jfs_truncate+0xce/0x140 fs/jfs/inode.c:412
jfs_setattr+0x4f8/0x750 fs/jfs/file.c:119
notify_change+0xb0d/0xe10 fs/attr.c:499
do_truncate+0x19b/0x220 fs/open.c:66
handle_truncate fs/namei.c:3291 [inline]
do_open fs/namei.c:3636 [inline]
path_openat+0x298c/0x3190 fs/namei.c:3789
do_filp_open+0x1c5/0x3d0 fs/namei.c:3816
do_sys_openat2+0x12c/0x1c0 fs/open.c:1419
do_sys_open fs/open.c:1434 [inline]
__do_sys_openat fs/open.c:1450 [inline]
__se_sys_openat fs/open.c:1445 [inline]
__x64_sys_openat+0x139/0x160 fs/open.c:1445
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:81
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7fefa6f8e929
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:00007fefa7edb038 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007fefa71b5fa0 RCX: 00007fefa6f8e929
RDX: 00000000000c0342 RSI: 0000200000000100 RDI: ffffffffffffff9c
RBP: 00007fefa7010b39 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000000001ff R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fefa71b5fa0 R15: 00007ffe88d70b38
</TASK>
general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007]
CPU: 0 PID: 6644 Comm: syz.5.110 Not tainted 6.6.96-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
RIP: 0010:__wake_up_common+0x23c/0x4e0 kernel/sched/wait.c:100
Code: 24 00 00 00 00 49 83 c5 40 4d 39 ef 0f 84 ed 01 00 00 45 31 f6 eb 09 4d 39 ef 0f 84 df 01 00 00 4c 89 fd 4c 89 f8 48 c1 e8 03 <80> 3c 10 00 74 12 48 89 ef e8 46 df 79 00 48 ba 00 00 00 00 00 fc
RSP: 0018:ffffc9000b21f538 EFLAGS: 00010046
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: dffffc0000000000 RSI: 0000000000000003 RDI: ffffc90002649030
RBP: 0000000000000000 R08: 0000000000000000 R09: ffffc9000b21f5e0
R10: dffffc0000000000 R11: fffff52001643e90 R12: ffffc90002649030
R13: ffffc90002649070 R14: 0000000000000000 R15: 0000000000000000
FS: 00007fefa7edb6c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f25d8ceae9c CR3: 00000000763d7000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<TASK>
__wake_up_common_lock kernel/sched/wait.c:138 [inline]
__wake_up+0x112/0x190 kernel/sched/wait.c:160
txEnd+0x8a/0x520 fs/jfs/jfs_txnmgr.c:504
jfs_truncate_nolock+0x1e5/0x2c0 fs/jfs/inode.c:400
jfs_truncate+0xce/0x140 fs/jfs/inode.c:412
jfs_setattr+0x4f8/0x750 fs/jfs/file.c:119
notify_change+0xb0d/0xe10 fs/attr.c:499
do_truncate+0x19b/0x220 fs/open.c:66
handle_truncate fs/namei.c:3291 [inline]
do_open fs/namei.c:3636 [inline]
path_openat+0x298c/0x3190 fs/namei.c:3789
do_filp_open+0x1c5/0x3d0 fs/namei.c:3816
do_sys_openat2+0x12c/0x1c0 fs/open.c:1419
do_sys_open fs/open.c:1434 [inline]
__do_sys_openat fs/open.c:1450 [inline]
__se_sys_openat fs/open.c:1445 [inline]
__x64_sys_openat+0x139/0x160 fs/open.c:1445
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:81
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7fefa6f8e929
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:00007fefa7edb038 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007fefa71b5fa0 RCX: 00007fefa6f8e929
RDX: 00000000000c0342 RSI: 0000200000000100 RDI: ffffffffffffff9c
RBP: 00007fefa7010b39 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000000001ff R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fefa71b5fa0 R15: 00007ffe88d70b38
</TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:__wake_up_common+0x23c/0x4e0 kernel/sched/wait.c:100
Code: 24 00 00 00 00 49 83 c5 40 4d 39 ef 0f 84 ed 01 00 00 45 31 f6 eb 09 4d 39 ef 0f 84 df 01 00 00 4c 89 fd 4c 89 f8 48 c1 e8 03 <80> 3c 10 00 74 12 48 89 ef e8 46 df 79 00 48 ba 00 00 00 00 00 fc
RSP: 0018:ffffc9000b21f538 EFLAGS: 00010046
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: dffffc0000000000 RSI: 0000000000000003 RDI: ffffc90002649030
RBP: 0000000000000000 R08: 0000000000000000 R09: ffffc9000b21f5e0
R10: dffffc0000000000 R11: fffff52001643e90 R12: ffffc90002649030
R13: ffffc90002649070 R14: 0000000000000000 R15: 0000000000000000
FS: 00007fefa7edb6c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f25d8ceae9c CR3: 00000000763d7000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess), 1 bytes skipped:
0: 00 00 add %al,(%rax)
2: 00 00 add %al,(%rax)
4: 49 83 c5 40 add $0x40,%r13
8: 4d 39 ef cmp %r13,%r15
b: 0f 84 ed 01 00 00 je 0x1fe
11: 45 31 f6 xor %r14d,%r14d
14: eb 09 jmp 0x1f
16: 4d 39 ef cmp %r13,%r15
19: 0f 84 df 01 00 00 je 0x1fe
1f: 4c 89 fd mov %r15,%rbp
22: 4c 89 f8 mov %r15,%rax
25: 48 c1 e8 03 shr $0x3,%rax
* 29: 80 3c 10 00 cmpb $0x0,(%rax,%rdx,1) <-- trapping instruction
2d: 74 12 je 0x41
2f: 48 89 ef mov %rbp,%rdi
32: e8 46 df 79 00 call 0x79df7d
37: 48 rex.W
38: ba 00 00 00 00 mov $0x0,%edx
3d: 00 fc add %bh,%ah
---
This report is generated by a bot. It may contain errors.
See https://goo.gl/tpsmEJ for more information about syzbot.
syzbot engineers can be reached at syzk...@googlegroups.com.
syzbot will keep track of this issue. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
If the report is already addressed, let syzbot know by replying with:
#syz fix: exact-commit-title
If you want to overwrite report's subsystems, reply with:
#syz set subsystems: new-subsystem
(See the list of subsystem names on the web dashboard)
If the report is a duplicate of another one, reply with:
#syz dup: exact-subject-of-another-report
If you want to undo deduplication, reply with:
#syz undup
syzbot
Jul 7, 2025, 6:58:32 PM7/7/25
to syzkaller...@googlegroups.com
syzbot has found a reproducer for the following issue on:
HEAD commit: a5df3a702b2c Linux 6.6.96
git tree: linux-6.6.y
console output: https://syzkaller.appspot.com/x/log.txt?x=10e1528c580000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=158d9582580000
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/9ba5b19f9f4d/disk-a5df3a70.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/2cd779015729/vmlinux-a5df3a70.xz
kernel image: https://storage.googleapis.com/syzbot-assets/b56fc39e5cb8/bzImage-a5df3a70.xz
mounted in repro: https://storage.googleapis.com/syzbot-assets/5d65b96cf402/mount_0.gz
fsck result: failed (log: https://syzkaller.appspot.com/x/fsck.log?x=118d9582580000)
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+5136e0...@syzkaller.appspotmail.com
ERROR: (device loop0): remounting filesystem as read-only
RIP: 0033:0x7fcac0f8e929
RAX: ffffffffffffffda RBX: 00007fcac11b5fa0 RCX: 00007fcac0f8e929
RBP: 0000000000000000 R08: 0000000000000000 R09: ffffc900034875e0
R10: dffffc0000000000 R11: fffff52000690e90 R12: ffffc90002659030
R13: ffffc90002659070 R14: 0000000000000000 R15: 0000000000000000
FS: 000055557ca4b500(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
RAX: ffffffffffffffda RBX: 00007fcac11b5fa0 RCX: 00007fcac0f8e929
RBP: 0000000000000000 R08: 0000000000000000 R09: ffffc900034875e0
R10: dffffc0000000000 R11: fffff52000690e90 R12: ffffc90002659030
R13: ffffc90002659070 R14: 0000000000000000 R15: 0000000000000000
FS: 000055557ca4b500(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
#syz test: git://repo/address.git branch-or-commit-hash
If you attach or paste a git patch, syzbot will apply it before testing.
HEAD commit: a5df3a702b2c Linux 6.6.96
git tree: linux-6.6.y
kernel config: https://syzkaller.appspot.com/x/.config?x=2632deddafa957e8
dashboard link: https://syzkaller.appspot.com/bug?extid=5136e06b0767f2c4b1e5
compiler: Debian clang version 20.1.7 (++20250616065708+6146a88f6049-1~exp1~20250616065826.132), Debian LLD 20.1.7
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=17f8c28c580000
dashboard link: https://syzkaller.appspot.com/bug?extid=5136e06b0767f2c4b1e5
compiler: Debian clang version 20.1.7 (++20250616065708+6146a88f6049-1~exp1~20250616065826.132), Debian LLD 20.1.7
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=158d9582580000
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/9ba5b19f9f4d/disk-a5df3a70.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/2cd779015729/vmlinux-a5df3a70.xz
kernel image: https://storage.googleapis.com/syzbot-assets/b56fc39e5cb8/bzImage-a5df3a70.xz
fsck result: failed (log: https://syzkaller.appspot.com/x/fsck.log?x=118d9582580000)
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+5136e0...@syzkaller.appspotmail.com
jfs_dirty_inode called on read-only volume
Is remount racy?
jfs_dirty_inode called on read-only volume
Is remount racy?
jfs_dirty_inode called on read-only volume
Is remount racy?
INFO: trying to register non-static key.
The code is fine but needs lockdep annotation, or maybe
you didn't initialize this object before use?
turning off the locking correctness validator.
CPU: 0 PID: 5947 Comm: syz.0.16 Not tainted 6.6.96-syzkaller #0
Is remount racy?
jfs_dirty_inode called on read-only volume
Is remount racy?
jfs_dirty_inode called on read-only volume
Is remount racy?
INFO: trying to register non-static key.
The code is fine but needs lockdep annotation, or maybe
you didn't initialize this object before use?
turning off the locking correctness validator.
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:00007fffd46efeb8 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007fcac11b5fa0 RCX: 00007fcac0f8e929
RDX: 00000000000c0342 RSI: 0000200000000100 RDI: ffffffffffffff9c
RBP: 00007fcac1010b39 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000000001ff R11: 0000000000000246 R12: 0000000000000000
R13: 00007fcac11b5fa0 R14: 00007fcac11b5fa0 R15: 0000000000000004
</TASK>
general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007]
CPU: 0 PID: 5947 Comm: syz.0.16 Not tainted 6.6.96-syzkaller #0
general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007]
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
RIP: 0010:__wake_up_common+0x23c/0x4e0 kernel/sched/wait.c:100
Code: 24 00 00 00 00 49 83 c5 40 4d 39 ef 0f 84 ed 01 00 00 45 31 f6 eb 09 4d 39 ef 0f 84 df 01 00 00 4c 89 fd 4c 89 f8 48 c1 e8 03 <80> 3c 10 00 74 12 48 89 ef e8 46 df 79 00 48 ba 00 00 00 00 00 fc
RSP: 0018:ffffc90003487538 EFLAGS: 00010046
RIP: 0010:__wake_up_common+0x23c/0x4e0 kernel/sched/wait.c:100
Code: 24 00 00 00 00 49 83 c5 40 4d 39 ef 0f 84 ed 01 00 00 45 31 f6 eb 09 4d 39 ef 0f 84 df 01 00 00 4c 89 fd 4c 89 f8 48 c1 e8 03 <80> 3c 10 00 74 12 48 89 ef e8 46 df 79 00 48 ba 00 00 00 00 00 fc
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: dffffc0000000000 RSI: 0000000000000003 RDI: ffffc90002659030
RBP: 0000000000000000 R08: 0000000000000000 R09: ffffc900034875e0
R10: dffffc0000000000 R11: fffff52000690e90 R12: ffffc90002659030
R13: ffffc90002659070 R14: 0000000000000000 R15: 0000000000000000
FS: 000055557ca4b500(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f666ce0b000 CR3: 0000000075283000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<TASK>
__wake_up_common_lock kernel/sched/wait.c:138 [inline]
__wake_up+0x112/0x190 kernel/sched/wait.c:160
txEnd+0x8a/0x520 fs/jfs/jfs_txnmgr.c:504
jfs_truncate_nolock+0x1e5/0x2c0 fs/jfs/inode.c:400
jfs_truncate+0xce/0x140 fs/jfs/inode.c:412
jfs_setattr+0x4f8/0x750 fs/jfs/file.c:119
notify_change+0xb0d/0xe10 fs/attr.c:499
do_truncate+0x19b/0x220 fs/open.c:66
handle_truncate fs/namei.c:3291 [inline]
do_open fs/namei.c:3636 [inline]
path_openat+0x298c/0x3190 fs/namei.c:3789
do_filp_open+0x1c5/0x3d0 fs/namei.c:3816
do_sys_openat2+0x12c/0x1c0 fs/open.c:1419
do_sys_open fs/open.c:1434 [inline]
__do_sys_openat fs/open.c:1450 [inline]
__se_sys_openat fs/open.c:1445 [inline]
__x64_sys_openat+0x139/0x160 fs/open.c:1445
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:81
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7fcac0f8e929
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<TASK>
__wake_up_common_lock kernel/sched/wait.c:138 [inline]
__wake_up+0x112/0x190 kernel/sched/wait.c:160
txEnd+0x8a/0x520 fs/jfs/jfs_txnmgr.c:504
jfs_truncate_nolock+0x1e5/0x2c0 fs/jfs/inode.c:400
jfs_truncate+0xce/0x140 fs/jfs/inode.c:412
jfs_setattr+0x4f8/0x750 fs/jfs/file.c:119
notify_change+0xb0d/0xe10 fs/attr.c:499
do_truncate+0x19b/0x220 fs/open.c:66
handle_truncate fs/namei.c:3291 [inline]
do_open fs/namei.c:3636 [inline]
path_openat+0x298c/0x3190 fs/namei.c:3789
do_filp_open+0x1c5/0x3d0 fs/namei.c:3816
do_sys_openat2+0x12c/0x1c0 fs/open.c:1419
do_sys_open fs/open.c:1434 [inline]
__do_sys_openat fs/open.c:1450 [inline]
__se_sys_openat fs/open.c:1445 [inline]
__x64_sys_openat+0x139/0x160 fs/open.c:1445
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:81
entry_SYSCALL_64_after_hwframe+0x68/0xd2
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:00007fffd46efeb8 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007fcac11b5fa0 RCX: 00007fcac0f8e929
RDX: 00000000000c0342 RSI: 0000200000000100 RDI: ffffffffffffff9c
RBP: 00007fcac1010b39 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000000001ff R11: 0000000000000246 R12: 0000000000000000
R13: 00007fcac11b5fa0 R14: 00007fcac11b5fa0 R15: 0000000000000004
</TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:__wake_up_common+0x23c/0x4e0 kernel/sched/wait.c:100
Code: 24 00 00 00 00 49 83 c5 40 4d 39 ef 0f 84 ed 01 00 00 45 31 f6 eb 09 4d 39 ef 0f 84 df 01 00 00 4c 89 fd 4c 89 f8 48 c1 e8 03 <80> 3c 10 00 74 12 48 89 ef e8 46 df 79 00 48 ba 00 00 00 00 00 fc
RSP: 0018:ffffc90003487538 EFLAGS: 00010046
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:__wake_up_common+0x23c/0x4e0 kernel/sched/wait.c:100
Code: 24 00 00 00 00 49 83 c5 40 4d 39 ef 0f 84 ed 01 00 00 45 31 f6 eb 09 4d 39 ef 0f 84 df 01 00 00 4c 89 fd 4c 89 f8 48 c1 e8 03 <80> 3c 10 00 74 12 48 89 ef e8 46 df 79 00 48 ba 00 00 00 00 00 fc
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: dffffc0000000000 RSI: 0000000000000003 RDI: ffffc90002659030
RBP: 0000000000000000 R08: 0000000000000000 R09: ffffc900034875e0
R10: dffffc0000000000 R11: fffff52000690e90 R12: ffffc90002659030
R13: ffffc90002659070 R14: 0000000000000000 R15: 0000000000000000
FS: 000055557ca4b500(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f666ce0b000 CR3: 0000000075283000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess), 1 bytes skipped:
0: 00 00 add %al,(%rax)
2: 00 00 add %al,(%rax)
4: 49 83 c5 40 add $0x40,%r13
8: 4d 39 ef cmp %r13,%r15
b: 0f 84 ed 01 00 00 je 0x1fe
11: 45 31 f6 xor %r14d,%r14d
14: eb 09 jmp 0x1f
16: 4d 39 ef cmp %r13,%r15
19: 0f 84 df 01 00 00 je 0x1fe
1f: 4c 89 fd mov %r15,%rbp
22: 4c 89 f8 mov %r15,%rax
25: 48 c1 e8 03 shr $0x3,%rax
* 29: 80 3c 10 00 cmpb $0x0,(%rax,%rdx,1) <-- trapping instruction
2d: 74 12 je 0x41
2f: 48 89 ef mov %rbp,%rdi
32: e8 46 df 79 00 call 0x79df7d
37: 48 rex.W
38: ba 00 00 00 00 mov $0x0,%edx
3d: 00 fc add %bh,%ah
---
If you want syzbot to run the reproducer, reply with:
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess), 1 bytes skipped:
0: 00 00 add %al,(%rax)
2: 00 00 add %al,(%rax)
4: 49 83 c5 40 add $0x40,%r13
8: 4d 39 ef cmp %r13,%r15
b: 0f 84 ed 01 00 00 je 0x1fe
11: 45 31 f6 xor %r14d,%r14d
14: eb 09 jmp 0x1f
16: 4d 39 ef cmp %r13,%r15
19: 0f 84 df 01 00 00 je 0x1fe
1f: 4c 89 fd mov %r15,%rbp
22: 4c 89 f8 mov %r15,%rax
25: 48 c1 e8 03 shr $0x3,%rax
* 29: 80 3c 10 00 cmpb $0x0,(%rax,%rdx,1) <-- trapping instruction
2d: 74 12 je 0x41
2f: 48 89 ef mov %rbp,%rdi
32: e8 46 df 79 00 call 0x79df7d
37: 48 rex.W
38: ba 00 00 00 00 mov $0x0,%edx
3d: 00 fc add %bh,%ah
---
#syz test: git://repo/address.git branch-or-commit-hash
If you attach or paste a git patch, syzbot will apply it before testing.
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