syzbot

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ODEBUG: init active (active state 0) object: ffff88804c5050f8 object type: timer_list hint: lec_arp_check_expire+0x0/0xc80 net/atm/lec.c:-1
WARNING: lib/debugobjects.c:632 at debug_print_object lib/debugobjects.c:629 [inline], CPU#1: syz.0.51/6305
WARNING: lib/debugobjects.c:632 at __debug_object_init+0x2d3/0x470 lib/debugobjects.c:780, CPU#1: syz.0.51/6305
Modules linked in:
CPU: 1 UID: 0 PID: 6305 Comm: syz.0.51 Not tainted syzkaller #0 PREEMPT_{RT,(full)} 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026
RIP: 0010:debug_print_object lib/debugobjects.c:629 [inline]
RIP: 0010:__debug_object_init+0x32f/0x470 lib/debugobjects.c:780
Code: 3c 28 00 74 08 4c 89 ef e8 1e aa 80 fd 4d 8b 4d 00 4c 89 f7 48 c7 c6 20 38 a7 8b 4c 89 fa 8b 4c 24 08 4c 8b 44 24 10 ff 34 24 <67> 48 0f b9 3a 48 83 c4 08 4c 8b 7c 24 18 ff 05 19 06 e1 0a 41 83
RSP: 0018:ffffc90004b878f8 EFLAGS: 00010246
RAX: 1ffffffff169ea58 RBX: ffff88804c5050f8 RCX: 0000000000000000
RDX: ffffffff8ba73c20 RSI: ffffffff8ba73820 RDI: ffffffff8f95e160
RBP: dffffc0000000000 R08: ffff88804c5050f8 R09: ffffffff8b4f6640
R10: dffffc0000000000 R11: ffffffff81b0ef00 R12: 0000000000000003
R13: ffffffff8b4f52c0 R14: ffffffff8f95e160 R15: ffffffff8ba73c20
FS:  00007fb4151be6c0(0000) GS:ffff888126209000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fcf0d38a6b0 CR3: 000000003f0f4000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 debug_timer_init kernel/time/timer.c:788 [inline]
 debug_init kernel/time/timer.c:836 [inline]
 timer_init_key+0x41/0x2c0 kernel/time/timer.c:880
 lec_arp_init net/atm/lec.c:1274 [inline]
 lecd_attach net/atm/lec.c:781 [inline]
 lane_ioctl+0x135b/0x1fc0 net/atm/lec.c:1037
 do_vcc_ioctl+0x36d/0x9d0 net/atm/ioctl.c:159
 svc_ioctl+0x1f6/0x7d0 net/atm/svc.c:611
 sock_do_ioctl+0x101/0x320 net/socket.c:1313
 sock_ioctl+0x5c9/0x7f0 net/socket.c:1434
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:597 [inline]
 __se_sys_ioctl+0xff/0x170 fs/ioctl.c:583
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x15f/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fb415b5c819
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fb4151be028 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fb415dd5fa0 RCX: 00007fb415b5c819
RDX: 0000000000000000 RSI: 00000000000061d0 RDI: 0000000000000005
RBP: 00007fb415bf2c91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fb415dd6038 R14: 00007fb415dd5fa0 R15: 00007ffe97f72978
 </TASK>
----------------
Code disassembly (best guess):
   0:	3c 28                	cmp    $0x28,%al
   2:	00 74 08 4c          	add    %dh,0x4c(%rax,%rcx,1)
   6:	89 ef                	mov    %ebp,%edi
   8:	e8 1e aa 80 fd       	call   0xfd80aa2b
   d:	4d 8b 4d 00          	mov    0x0(%r13),%r9
  11:	4c 89 f7             	mov    %r14,%rdi
  14:	48 c7 c6 20 38 a7 8b 	mov    $0xffffffff8ba73820,%rsi
  1b:	4c 89 fa             	mov    %r15,%rdx
  1e:	8b 4c 24 08          	mov    0x8(%rsp),%ecx
  22:	4c 8b 44 24 10       	mov    0x10(%rsp),%r8
  27:	ff 34 24             	push   (%rsp)
* 2a:	67 48 0f b9 3a       	ud1    (%edx),%rdi <-- trapping instruction
  2f:	48 83 c4 08          	add    $0x8,%rsp
  33:	4c 8b 7c 24 18       	mov    0x18(%rsp),%r15
  38:	ff 05 19 06 e1 0a    	incl   0xae10619(%rip)        # 0xae10657
  3e:	41                   	rex.B
  3f:	83                   	.byte 0x83