------------[ cut here ]------------ ODEBUG: init active (active state 0) object: ffff88807e600f38 object type: timer_list hint: lec_arp_check_expire+0x0/0xc90 net/atm/lec.c:-1 WARNING: lib/debugobjects.c:632 at debug_print_object lib/debugobjects.c:629 [inline], CPU#1: syz.2.97/6278 WARNING: lib/debugobjects.c:632 at __debug_object_init+0x2b1/0x4e0 lib/debugobjects.c:780, CPU#1: syz.2.97/6278 Modules linked in: CPU: 1 UID: 0 PID: 6278 Comm: syz.2.97 Not tainted syzkaller #0 PREEMPT(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+0x30f/0x4e0 lib/debugobjects.c:780 Code: 3c 38 00 74 08 4c 89 ef e8 be 84 75 fd 4d 8b 4d 00 4c 89 f7 48 c7 c6 a0 9a 28 8c 4c 89 e2 8b 4c 24 08 4c 8b 04 24 ff 74 24 10 <67> 48 0f b9 3a 48 83 c4 08 ff 05 4e 78 78 0b 83 fd 03 75 3f 4c 8b RSP: 0018:ffffc900061778f8 EFLAGS: 00010246 RAX: 1ffffffff179e734 RBX: ffff88807e600f38 RCX: 0000000000000000 RDX: ffffffff8c289ea0 RSI: ffffffff8c289aa0 RDI: ffffffff903e1b20 RBP: 0000000000000003 R08: ffff88807e600f38 R09: ffffffff8bcf4d00 R10: dffffc0000000000 R11: ffffffff81b22670 R12: ffffffff8c289ea0 R13: ffffffff8bcf39a0 R14: ffffffff903e1b20 R15: dffffc0000000000 FS: 00007f6ee98d26c0(0000) GS:ffff888125325000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000563b5360e3e0 CR3: 000000004c8b1000 CR4: 0000000000350ef0 Call Trace: 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+0x1579/0x2220 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+0x5c6/0x7f0 net/socket.c:1434 ---------------- Code disassembly (best guess): 0: 3c 38 cmp $0x38,%al 2: 00 74 08 4c add %dh,0x4c(%rax,%rcx,1) 6: 89 ef mov %ebp,%edi 8: e8 be 84 75 fd call 0xfd7584cb d: 4d 8b 4d 00 mov 0x0(%r13),%r9 11: 4c 89 f7 mov %r14,%rdi 14: 48 c7 c6 a0 9a 28 8c mov $0xffffffff8c289aa0,%rsi 1b: 4c 89 e2 mov %r12,%rdx 1e: 8b 4c 24 08 mov 0x8(%rsp),%ecx 22: 4c 8b 04 24 mov (%rsp),%r8 26: ff 74 24 10 push 0x10(%rsp) * 2a: 67 48 0f b9 3a ud1 (%edx),%rdi <-- trapping instruction 2f: 48 83 c4 08 add $0x8,%rsp 33: ff 05 4e 78 78 0b incl 0xb78784e(%rip) # 0xb787887 39: 83 fd 03 cmp $0x3,%ebp 3c: 75 3f jne 0x7d 3e: 4c rex.WR 3f: 8b .byte 0x8b