------------[ cut here ]------------ ODEBUG: init active (active state 0) object: ffff888033558f38 object type: timer_list hint: lec_arp_check_expire+0x0/0x9e0 net/atm/lec.c:1270 WARNING: lib/debugobjects.c:629 at debug_print_object+0x18e/0x2a0 lib/debugobjects.c:629, CPU#1: syz-executor317/5845 Modules linked in: CPU: 1 UID: 0 PID: 5845 Comm: syz-executor317 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026 RIP: 0010:debug_print_object+0x19b/0x2a0 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 32 2e e5 0b 41 56 48 8b 14 dd e0 2b 1b 8c 4c 89 e6 <67> 48 0f b9 3a 58 83 05 ac ea da 0b 01 48 83 c4 18 5b 5d 41 5c 41 RSP: 0018:ffffc90003f97848 EFLAGS: 00010246 RAX: dffffc0000000000 RBX: 0000000000000003 RCX: 0000000000000000 RDX: ffffffff8c1b2b20 RSI: ffffffff8c1b2700 RDI: ffffffff90e43d80 RBP: 0000000000000001 R08: ffff888033558f38 R09: ffffffff8bb2bba0 R10: 0000000000000001 R11: 0000000000000000 R12: ffffffff8c1b2700 R13: ffffffff8bb2bbe0 R14: ffffffff8ac067d0 R15: ffffc90003f97908 FS: 00007f6c94f0b6c0(0000) GS:ffff88812443c000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f7ee4dcdeb8 CR3: 00000000737a8000 CR4: 00000000003526f0 Call Trace: __debug_object_init+0x229/0x3d0 lib/debugobjects.c:780 debug_timer_init kernel/time/timer.c:788 [inline] debug_init kernel/time/timer.c:836 [inline] timer_init_key+0x35/0x340 kernel/time/timer.c:880 lec_arp_init net/atm/lec.c:1274 [inline] lecd_attach net/atm/lec.c:781 [inline] lane_ioctl+0x8f8/0x2600 net/atm/lec.c:1037 do_vcc_ioctl+0x493/0x890 net/atm/ioctl.c:159 svc_ioctl+0x335/0x730 net/atm/svc.c:611 sock_do_ioctl+0x118/0x280 net/socket.c:1254 sock_ioctl+0x599/0x6b0 net/socket.c:1375 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:597 [inline] __se_sys_ioctl fs/ioctl.c:583 [inline] __x64_sys_ioctl+0x18e/0x210 fs/ioctl.c:583 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x106/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f6c94f33099 Code: c0 79 93 eb d5 48 8d 7c 1d 00 eb 99 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 d0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f6c94f0b158 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f6c94fe3b48 RCX: 00007f6c94f33099 RDX: 0000000000000000 RSI: 00000000000061d0 RDI: 0000000000000005 RBP: 00007f6c94fe3b40 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f6c94fb53b0 R13: 0000000000000000 R14: 0000200000000040 R15: b635773f07ebbeef ---------------- 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 32 2e e5 0b lea 0xbe52e32(%rip),%rdi # 0xbe52e4f 1d: 41 56 push %r14 1f: 48 8b 14 dd e0 2b 1b mov -0x73e4d420(,%rbx,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 ac ea da 0b 01 addl $0x1,0xbdaeaac(%rip) # 0xbdaeae3 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