------------[ cut here ]------------
ODEBUG: free active (active state 0) object: ffff888057fe5090 object type: timer_list hint: rose_t0timer_expiry+0x0/0x350 net/rose/rose_link.c:-1
WARNING: CPU: 0 PID: 19692 at lib/debugobjects.c:615 debug_print_object+0x16b/0x1e0 lib/debugobjects.c:612
Modules linked in:
CPU: 0 UID: 0 PID: 19692 Comm: syz.0.5299 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
RIP: 0010:debug_print_object+0x16b/0x1e0 lib/debugobjects.c:612
Code: 4c 89 ff e8 97 e8 52 fd 4d 8b 0f 48 c7 c7 20 40 e3 8b 48 8b 34 24 4c 89 ea 89 e9 4d 89 f0 41 54 e8 2a 1e b3 fc 48 83 c4 08 90 <0f> 0b 90 90 ff 05 67 8a d3 0a 48 83 c4 08 5b 41 5c 41 5d 41 5e 41
RSP: 0018:ffffc90000007a10 EFLAGS: 00010292
RAX: 7b28214f706ee900 RBX: dffffc0000000000 RCX: ffff888077f43c00
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000002
RBP: 0000000000000000 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffffbfff1bfa1ec R12: ffffffff8a6c9760
R13: ffffffff8be341a0 R14: ffff888057fe5090 R15: ffffffff8b8cdfa0
FS:  00007f04e7ff66c0(0000) GS:ffff888125c1b000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000002b00 CR3: 000000005ebfc000 CR4: 00000000003526f0
Call Trace:
 <IRQ>
 __debug_check_no_obj_freed lib/debugobjects.c:1099 [inline]
 debug_check_no_obj_freed+0x3a2/0x470 lib/debugobjects.c:1129
 slab_free_hook mm/slub.c:2348 [inline]
 slab_free mm/slub.c:4680 [inline]
 kfree+0x112/0x440 mm/slub.c:4879
 rose_neigh_put include/net/rose.h:166 [inline]
 rose_timer_expiry+0x4cb/0x600 net/rose/rose_timer.c:183
 call_timer_fn+0x17e/0x5f0 kernel/time/timer.c:1747
 expire_timers kernel/time/timer.c:1798 [inline]
 __run_timers kernel/time/timer.c:2372 [inline]
 __run_timer_base+0x61a/0x860 kernel/time/timer.c:2384
 run_timer_base kernel/time/timer.c:2393 [inline]
 run_timer_softirq+0xb7/0x180 kernel/time/timer.c:2403
 handle_softirqs+0x283/0x870 kernel/softirq.c:579
 __do_softirq kernel/softirq.c:613 [inline]
 invoke_softirq kernel/softirq.c:453 [inline]
 __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:680
 irq_exit_rcu+0x9/0x30 kernel/softirq.c:696
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1050 [inline]
 sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1050
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:slab_alloc_node mm/slub.c:4210 [inline]
RIP: 0010:kmem_cache_alloc_node_noprof+0x7b/0x3c0 mm/slub.c:4281
Code: 04 00 00 74 16 48 c7 c7 f9 1f a3 8d be 41 01 00 00 e8 19 7d 79 ff 2e 2e 2e 31 c0 4c 89 ff 89 de e8 da 78 0b 00 31 db 4d 85 ff <0f> 84 7c 01 00 00 85 c0 0f 85 74 01 00 00 89 6c 24 0c 0f 1f 44 00
RSP: 0018:ffffc9000c1b74d8 EFLAGS: 00000286
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 00000000000000f0 RDI: ffffffff8e2594e0
RBP: 00000000ffffffff R08: 0000000000000001 R09: 0000000000000000
R10: dffffc0000000000 R11: fffffbfff1f470a7 R12: 0000000000000cc0
R13: 0000000000000cc0 R14: 0000000000000cc0 R15: ffff88801dad8a00
 __alloc_skb+0x112/0x2d0 net/core/skbuff.c:659
 alloc_skb include/linux/skbuff.h:1336 [inline]
 netlink_dump+0x1b7/0xe90 net/netlink/af_netlink.c:2292
 netlink_recvmsg+0x676/0xa30 net/netlink/af_netlink.c:1978
 sock_recvmsg_nosec+0x183/0x1c0 net/socket.c:1065
 ____sys_recvmsg+0x3aa/0x460 net/socket.c:2832
 ___sys_recvmsg+0x1b5/0x510 net/socket.c:2876
 do_recvmmsg+0x307/0x770 net/socket.c:2971
 __sys_recvmmsg net/socket.c:3045 [inline]
 __do_sys_recvmmsg net/socket.c:3068 [inline]
 __se_sys_recvmmsg net/socket.c:3061 [inline]
 __x64_sys_recvmmsg+0x190/0x240 net/socket.c:3061
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f04e9d8ebe9
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:00007f04e7ff6038 EFLAGS: 00000246 ORIG_RAX: 000000000000012b
RAX: ffffffffffffffda RBX: 00007f04e9fb5fa0 RCX: 00007f04e9d8ebe9
RDX: 0000000000000004 RSI: 00002000000086c0 RDI: 0000000000000003
RBP: 00007f04e9e11e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000004022 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f04e9fb6038 R14: 00007f04e9fb5fa0 R15: 00007ffcb77a0ee8
 </TASK>
----------------
Code disassembly (best guess):
   0:	04 00                	add    $0x0,%al
   2:	00 74 16 48          	add    %dh,0x48(%rsi,%rdx,1)
   6:	c7 c7 f9 1f a3 8d    	mov    $0x8da31ff9,%edi
   c:	be 41 01 00 00       	mov    $0x141,%esi
  11:	e8 19 7d 79 ff       	call   0xff797d2f
  16:	2e 2e 2e 31 c0       	cs cs cs xor %eax,%eax
  1b:	4c 89 ff             	mov    %r15,%rdi
  1e:	89 de                	mov    %ebx,%esi
  20:	e8 da 78 0b 00       	call   0xb78ff
  25:	31 db                	xor    %ebx,%ebx
  27:	4d 85 ff             	test   %r15,%r15
* 2a:	0f 84 7c 01 00 00    	je     0x1ac <-- trapping instruction
  30:	85 c0                	test   %eax,%eax
  32:	0f 85 74 01 00 00    	jne    0x1ac
  38:	89 6c 24 0c          	mov    %ebp,0xc(%rsp)
  3c:	0f                   	.byte 0xf
  3d:	1f                   	(bad)
  3e:	44                   	rex.R