------------[ cut here ]------------
ODEBUG: free active (active state 0) object: ffff888031662890 object type: timer_list hint: rose_t0timer_expiry+0x0/0x560 net/rose/rose_link.c:-1
WARNING: lib/debugobjects.c:632 at debug_print_object lib/debugobjects.c:629 [inline], CPU#1: syz.1.4002/20908
WARNING: lib/debugobjects.c:632 at __debug_check_no_obj_freed lib/debugobjects.c:1116 [inline], CPU#1: syz.1.4002/20908
WARNING: lib/debugobjects.c:632 at debug_check_no_obj_freed+0x405/0x550 lib/debugobjects.c:1146, CPU#1: syz.1.4002/20908
Modules linked in:
CPU: 1 UID: 0 PID: 20908 Comm: syz.1.4002 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 lib/debugobjects.c:629 [inline]
RIP: 0010:__debug_check_no_obj_freed lib/debugobjects.c:1116 [inline]
RIP: 0010:debug_check_no_obj_freed+0x44a/0x550 lib/debugobjects.c:1146
Code: 89 44 24 20 e8 e7 2c 77 fd 48 8b 44 24 20 4c 8b 4d 00 4c 89 ef 48 c7 c6 40 bb 27 8c 48 c7 c2 c0 c0 27 8c 8b 0c 24 4d 89 f8 50 <67> 48 0f b9 3a 48 83 c4 08 4c 8b 6c 24 18 48 b9 00 00 00 00 00 fc
RSP: 0018:ffffc90000a08b68 EFLAGS: 00010246
RAX: ffffffff8a965980 RBX: ffffffff9a560fc8 RCX: 0000000000000000
RDX: ffffffff8c27c0c0 RSI: ffffffff8c27bb40 RDI: ffffffff901bee60
RBP: ffffffff8bcf3ce0 R08: ffff888031662890 R09: ffffffff8bcf5000
R10: dffffc0000000000 R11: ffffffff81b1e6a0 R12: ffff888031662a00
R13: ffffffff901bee60 R14: ffff888031662000 R15: ffff888031662890
FS:  00007faa9e9f66c0(0000) GS:ffff888125567000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000604030 CR3: 000000002b9cc000 CR4: 00000000003526f0
Call Trace:
 <IRQ>
 slab_free_hook mm/slub.c:2623 [inline]
 slab_free mm/slub.c:6168 [inline]
 kfree+0x13a/0x630 mm/slub.c:6486
 rose_neigh_put include/net/rose.h:166 [inline]
 rose_timer_expiry+0x4cb/0x600 net/rose/rose_timer.c:183
 call_timer_fn+0x192/0x640 kernel/time/timer.c:1748
 expire_timers kernel/time/timer.c:1799 [inline]
 __run_timers kernel/time/timer.c:2373 [inline]
 __run_timer_base+0x652/0x8b0 kernel/time/timer.c:2385
 run_timer_base kernel/time/timer.c:2394 [inline]
 run_timer_softirq+0xb7/0x170 kernel/time/timer.c:2404
 handle_softirqs+0x22a/0x870 kernel/softirq.c:622
 __do_softirq kernel/softirq.c:656 [inline]
 invoke_softirq kernel/softirq.c:496 [inline]
 __irq_exit_rcu+0x5f/0x150 kernel/softirq.c:723
 irq_exit_rcu+0x9/0x30 kernel/softirq.c:739
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1056 [inline]
 sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1056
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:preempt_count arch/x86/include/asm/preempt.h:27 [inline]
RIP: 0010:check_kcov_mode kernel/kcov.c:183 [inline]
RIP: 0010:write_comp_data kernel/kcov.c:246 [inline]
RIP: 0010:__sanitizer_cov_trace_const_cmp4+0x10/0x90 kernel/kcov.c:314
Code: 09 cc 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 48 8b 04 24 65 48 8b 15 08 ee 55 11 <65> 8b 0d 29 ee 55 11 81 e1 00 01 ff 00 74 11 81 f9 00 01 00 00 75
RSP: 0018:ffffc9000d39f8b8 EFLAGS: 00000246
RAX: ffffffff897215f3 RBX: 0000000000000000 RCX: 0000000000080000
RDX: ffff8880308a3d00 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc9000d39fa30 R08: 0000000000000000 R09: 000000000001808c
R10: ffffc9000d39fcf3 R11: fffff52001a73fa0 R12: 1ffff92001a73f24
R13: ffffc9000d39fce0 R14: ffffc9000d39f940 R15: dffffc0000000000
 ____sys_recvmsg+0xb3/0x4a0 net/socket.c:2786
 ___sys_recvmsg+0x215/0x590 net/socket.c:2847
 do_recvmmsg+0x334/0x800 net/socket.c:2942
 __sys_recvmmsg net/socket.c:3016 [inline]
 __do_sys_recvmmsg net/socket.c:3039 [inline]
 __se_sys_recvmmsg net/socket.c:3032 [inline]
 __x64_sys_recvmmsg+0x198/0x250 net/socket.c:3032
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x14d/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7faaa079c799
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:00007faa9e9f6028 EFLAGS: 00000246 ORIG_RAX: 000000000000012b
RAX: ffffffffffffffda RBX: 00007faaa0a16090 RCX: 00007faaa079c799
RDX: 03ffffffffffff67 RSI: 0000200000002440 RDI: 0000000000000008
RBP: 00007faaa0832c99 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007faaa0a16128 R14: 00007faaa0a16090 R15: 00007ffdd56eeee8
 </TASK>
----------------
Code disassembly (best guess):
   0:	89 44 24 20          	mov    %eax,0x20(%rsp)
   4:	e8 e7 2c 77 fd       	call   0xfd772cf0
   9:	48 8b 44 24 20       	mov    0x20(%rsp),%rax
   e:	4c 8b 4d 00          	mov    0x0(%rbp),%r9
  12:	4c 89 ef             	mov    %r13,%rdi
  15:	48 c7 c6 40 bb 27 8c 	mov    $0xffffffff8c27bb40,%rsi
  1c:	48 c7 c2 c0 c0 27 8c 	mov    $0xffffffff8c27c0c0,%rdx
  23:	8b 0c 24             	mov    (%rsp),%ecx
  26:	4d 89 f8             	mov    %r15,%r8
  29:	50                   	push   %rax
* 2a:	67 48 0f b9 3a       	ud1    (%edx),%rdi <-- trapping instruction
  2f:	48 83 c4 08          	add    $0x8,%rsp
  33:	4c 8b 6c 24 18       	mov    0x18(%rsp),%r13
  38:	48                   	rex.W
  39:	b9 00 00 00 00       	mov    $0x0,%ecx
  3e:	00 fc                	add    %bh,%ah