[moderation] [greybus?] WARNING: ODEBUG bug in do_work

[syzbot]

Hello,

syzbot found the following issue on:

HEAD commit: a5ebb76233b7 Merge tag 'edac_urgent_for_v7.3_rc7' of git:/..
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=163d9ed1580000
kernel config: https://syzkaller.appspot.com/x/.config?x=3e4baf48b1a52e1
dashboard link: https://syzkaller.appspot.com/bug?extid=e6bea924b5ee24f7cb98
compiler: gcc (Debian 14.2.0-19) 14.2.0, GNU ld (GNU Binutils for Debian) 2.44
CC: [el...@kernel.org gre...@linuxfoundation.org greyb...@lists.linaro.org jo...@kernel.org linux-...@vger.kernel.org linux...@vger.kernel.org linux-...@lists.linux.dev]

Unfortunately, I don't have any reproducer for this issue yet.

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/7497e8a89af9/disk-a5ebb762.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/f3009c70c957/vmlinux-a5ebb762.xz
kernel image: https://storage.googleapis.com/syzbot-assets/076b9fadbe58/bzImage-a5ebb762.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+e6bea9...@syzkaller.appspotmail.com

greybus 1-svc: Resetting the greybus network, watch out!!!
usb 9-1: failed to submit out-urb: -90
greybus greybus2: 0/0:0: synchronous operation id 0x0004 of type 0x13 failed: -90
greybus 2-svc: SVC ping has returned -90, something is wrong!!!
greybus 2-svc: Resetting the greybus network, watch out!!!
------------[ cut here ]------------
ODEBUG: init active (active state 0) object: ffffffff9ccea648 object type: timer_list hint: greybus_reset+0x0/0x42 usercopy_64.c:-1
WARNING: lib/debugobjects.c:629 at debug_print_object+0x198/0x2b0 lib/debugobjects.c:629, CPU#1: kworker/1:1/30
Modules linked in:
CPU: 1 UID: 0 PID: 30 Comm: kworker/1:1 Tainted: G L syzkaller #0 PREEMPT(full)
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/05/2026
Workqueue: events do_work
RIP: 0010:debug_print_object+0x1a5/0x2b0 lib/debugobjects.c:629
Code: b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 75 4f 48 8d 3d e8 d7 1a 0d 41 56 48 8b 14 ed 40 6d 62 8c 4c 89 e6 <67> 48 0f b9 3a 58 83 05 a2 06 10 0d 01 48 83 c4 18 5b 5d 41 5c 41
RSP: 0018:ffffc90000a57a68 EFLAGS: 00010246
RAX: dffffc0000000000 RBX: ffffc90000a57b10 RCX: 0000000000000000
RDX: ffffffff8c626c80 RSI: ffffffff8c6267e0 RDI: ffffffff92509c20
RBP: 0000000000000003 R08: ffffffff9ccea648 R09: ffffffff8bf312a0
R10: 0000000000000001 R11: 0000000000000000 R12: ffffffff8c6267e0
R13: ffffffff8bf312e0 R14: ffffffff816aec90 R15: ffffc90000a57b28
FS: 0000000000000000(0000) GS:ffff888122a44000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000006002 CR3: 000000001ff05000 CR4: 0000000000350ef0
DR0: 0000000000010000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
<TASK>
__debug_object_init+0x229/0x3d0 lib/debugobjects.c:818
debug_timer_init kernel/time/timer.c:788 [inline]
debug_init kernel/time/timer.c:836 [inline]
timer_init_key+0x35/0x310 kernel/time/timer.c:880
do_work.cold+0x12f/0x1b3 drivers/greybus/svc_watchdog.c:91
process_one_work+0xac7/0x1b10 kernel/workqueue.c:3396
process_scheduled_works kernel/workqueue.c:3479 [inline]
worker_thread+0x5ef/0xe50 kernel/workqueue.c:3560
kthread+0x373/0x450 kernel/kthread.c:436
ret_from_fork+0x730/0xd60 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
</TASK>
----------------
Code disassembly (best guess):
0: b8 00 00 00 00 mov $0x0,%eax
5: 00 fc add %bh,%ah
7: ff lcall (bad)
8: df 48 89 fisttps -0x77(%rax)
b: fa cli
c: 48 c1 ea 03 shr $0x3,%rdx
10: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1)
14: 75 4f jne 0x65
16: 48 8d 3d e8 d7 1a 0d lea 0xd1ad7e8(%rip),%rdi # 0xd1ad805
1d: 41 56 push %r14
1f: 48 8b 14 ed 40 6d 62 mov -0x739d92c0(,%rbp,8),%rdx
26: 8c
27: 4c 89 e6 mov %r12,%rsi
* 2a: 67 48 0f b9 3a ud1 (%edx),%rdi <-- trapping instruction
2f: 58 pop %rax
30: 83 05 a2 06 10 0d 01 addl $0x1,0xd1006a2(%rip) # 0xd1006d9
37: 48 83 c4 18 add $0x18,%rsp
3b: 5b pop %rbx
3c: 5d pop %rbp
3d: 41 5c pop %r12
3f: 41 rex.B


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