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ODEBUG: free active (active state 0) object: ffff888057bd1890 object type: timer_list hint: rose_t0timer_expiry+0x0/0x150 include/linux/skbuff.h:2927
WARNING: CPU: 0 PID: 8595 at lib/debugobjects.c:612 debug_print_object+0x1a2/0x2b0 lib/debugobjects.c:612
Modules linked in:
CPU: 0 UID: 0 PID: 8595 Comm: syz.4.691 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
RIP: 0010:debug_print_object+0x1a2/0x2b0 lib/debugobjects.c:612
Code: fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 75 54 41 56 48 8b 14 dd a0 81 f0 8b 4c 89 e6 48 c7 c7 20 76 f0 8b e8 3f c4 ce fc 90 <0f> 0b 90 90 58 83 05 56 e6 d5 0b 01 48 83 c4 18 5b 5d 41 5c 41 5d
RSP: 0018:ffffc90000007a18 EFLAGS: 00010282
RAX: 0000000000000000 RBX: 0000000000000003 RCX: ffffffff817b1cd8
RDX: ffff88803c178000 RSI: ffffffff817b1ce5 RDI: 0000000000000001
RBP: 0000000000000001 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000001 R12: ffffffff8bf07cc0
R13: ffffffff8b9021a0 R14: ffffffff8a4d8dc0 R15: ffffc90000007b18
FS:  00007f34e1fb96c0(0000) GS:ffff888124a08000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000020000005f000 CR3: 00000000578d2000 CR4: 00000000003526f0
Call Trace:
 <IRQ>
 __debug_check_no_obj_freed lib/debugobjects.c:1099 [inline]
 debug_check_no_obj_freed+0x4b7/0x600 lib/debugobjects.c:1129
 slab_free_hook mm/slub.c:2470 [inline]
 slab_free mm/slub.c:6634 [inline]
 kfree+0x291/0x6d0 mm/slub.c:6841
 rose_neigh_put include/net/rose.h:166 [inline]
 rose_timer_expiry+0x53f/0x630 net/rose/rose_timer.c:183
 call_timer_fn+0x19a/0x620 kernel/time/timer.c:1747
 expire_timers kernel/time/timer.c:1798 [inline]
 __run_timers+0x6ef/0x960 kernel/time/timer.c:2372
 __run_timer_base kernel/time/timer.c:2384 [inline]
 __run_timer_base kernel/time/timer.c:2376 [inline]
 run_timer_base+0x114/0x190 kernel/time/timer.c:2393
 run_timer_softirq+0x1a/0x40 kernel/time/timer.c:2403
 handle_softirqs+0x219/0x8e0 kernel/softirq.c:622
 __do_softirq kernel/softirq.c:656 [inline]
 invoke_softirq kernel/softirq.c:496 [inline]
 __irq_exit_rcu+0x109/0x170 kernel/softirq.c:723
 irq_exit_rcu+0x9/0x30 kernel/softirq.c:739
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1052 [inline]
 sysvec_apic_timer_interrupt+0xa4/0xc0 arch/x86/kernel/apic/apic.c:1052
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:__sanitizer_cov_trace_pc+0x56/0x70 kernel/kcov.c:222
Code: 00 f0 00 75 35 8b 82 7c 16 00 00 85 c0 74 2b 8b 82 58 16 00 00 83 f8 02 75 20 48 8b 8a 60 16 00 00 8b 92 5c 16 00 00 48 8b 01 <48> 83 c0 01 48 39 d0 73 07 48 89 01 48 89 34 c1 c3 cc cc cc cc 0f
RSP: 0018:ffffc90003477720 EFLAGS: 00000246
RAX: 0000000000026bfc RBX: ffff8880790d0410 RCX: ffffc90010d5c000
RDX: 0000000000080000 RSI: ffffffff8456e794 RDI: 0000000000000002
RBP: 0000000000000039 R08: 0000000000000002 R09: 0000000000000019
R10: 0000000000000039 R11: 0000000000000001 R12: dffffc0000000000
R13: 0000000000000094 R14: 0000000000000019 R15: 0000000000000094
 avc_search_node security/selinux/avc.c:528 [inline]
 avc_lookup+0x84/0x1d0 security/selinux/avc.c:557
 avc_has_perm_noaudit+0x97/0x3b0 security/selinux/avc.c:1156
 avc_has_perm+0xbe/0x1f0 security/selinux/avc.c:1194
 selinux_socket_unix_may_send+0x1e7/0x2b0 security/selinux/hooks.c:5217
 security_unix_may_send+0x8e/0x210 security/security.c:4619
 unix_dgram_sendmsg+0xbc8/0x17f0 net/unix/af_unix.c:2260
 sock_sendmsg_nosec net/socket.c:727 [inline]
 __sock_sendmsg net/socket.c:742 [inline]
 ____sys_sendmsg+0xa98/0xc70 net/socket.c:2630
 ___sys_sendmsg+0x134/0x1d0 net/socket.c:2684
 __sys_sendmsg+0x16d/0x220 net/socket.c:2716
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xcd/0xfa0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f34e118f6c9
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:00007f34e1fb9038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f34e13e6270 RCX: 00007f34e118f6c9
RDX: 0000000000000000 RSI: 0000200000000180 RDI: 0000000000000006
RBP: 00007f34e1211f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f34e13e6308 R14: 00007f34e13e6270 R15: 00007ffc9d212f08
 </TASK>
----------------
Code disassembly (best guess):
   0:	00 f0                	add    %dh,%al
   2:	00 75 35             	add    %dh,0x35(%rbp)
   5:	8b 82 7c 16 00 00    	mov    0x167c(%rdx),%eax
   b:	85 c0                	test   %eax,%eax
   d:	74 2b                	je     0x3a
   f:	8b 82 58 16 00 00    	mov    0x1658(%rdx),%eax
  15:	83 f8 02             	cmp    $0x2,%eax
  18:	75 20                	jne    0x3a
  1a:	48 8b 8a 60 16 00 00 	mov    0x1660(%rdx),%rcx
  21:	8b 92 5c 16 00 00    	mov    0x165c(%rdx),%edx
  27:	48 8b 01             	mov    (%rcx),%rax
* 2a:	48 83 c0 01          	add    $0x1,%rax <-- trapping instruction
  2e:	48 39 d0             	cmp    %rdx,%rax
  31:	73 07                	jae    0x3a
  33:	48 89 01             	mov    %rax,(%rcx)
  36:	48 89 34 c1          	mov    %rsi,(%rcx,%rax,8)
  3a:	c3                   	ret
  3b:	cc                   	int3
  3c:	cc                   	int3
  3d:	cc                   	int3
  3e:	cc                   	int3
  3f:	0f                   	.byte 0xf