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ODEBUG: free active (active state 0) object: ffff888078e16490 object type: timer_list hint: rose_t0timer_expiry+0x0/0x150 include/linux/skbuff.h:2880
WARNING: CPU: 0 PID: 25835 at lib/debugobjects.c:612 debug_print_object+0x1a2/0x2b0 lib/debugobjects.c:612
Modules linked in:
CPU: 0 UID: 0 PID: 25835 Comm: syz.2.4696 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+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 60 3a 16 8c 4c 89 e6 48 c7 c7 e0 2e 16 8c e8 8f 6c 8f fc 90 <0f> 0b 90 90 58 83 05 26 bf c0 0b 01 48 83 c4 18 5b 5d 41 5c 41 5d
RSP: 0018:ffffc90000007a28 EFLAGS: 00010286
RAX: 0000000000000000 RBX: 0000000000000003 RCX: ffffffff817a3358
RDX: ffff888052412440 RSI: ffffffff817a3365 RDI: 0000000000000001
RBP: 0000000000000001 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 000000000003d020 R12: ffffffff8c163580
R13: ffffffff8bafed40 R14: ffffffff8a817c30 R15: ffffc90000007b28
FS:  0000555556040500(0000) GS:ffff8881246b8000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000001340 CR3: 000000005e1a7000 CR4: 00000000003526f0
DR0: 0000000000000002 DR1: 0000000000000002 DR2: 0000000000000008
DR3: 1000000100000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
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:2348 [inline]
 slab_free mm/slub.c:4680 [inline]
 kfree+0x28f/0x4d0 mm/slub.c:4879
 rose_neigh_put include/net/rose.h:166 [inline]
 rose_timer_expiry+0x53f/0x630 net/rose/rose_timer.c:183
 call_timer_fn+0x197/0x620 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+0x216/0x8e0 kernel/softirq.c:579
 __do_softirq kernel/softirq.c:613 [inline]
 invoke_softirq kernel/softirq.c:453 [inline]
 __irq_exit_rcu+0x109/0x170 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+0xa4/0xc0 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:check_kcov_mode kernel/kcov.c:185 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0x3b/0x70 kernel/kcov.c:217
Code: 8b 05 19 f4 1a 12 a9 00 01 ff 00 74 1d f6 c4 01 74 43 a9 00 00 0f 00 75 3c a9 00 00 f0 00 75 35 8b 82 3c 16 00 00 85 c0 74 2b <8b> 82 18 16 00 00 83 f8 02 75 20 48 8b 8a 20 16 00 00 8b 92 1c 16
RSP: 0018:ffffc900043afd90 EFLAGS: 00000246
RAX: 0000000080000000 RBX: ffff888052412440 RCX: 0000000000000001
RDX: ffff888052412440 RSI: ffffffff82060dcc RDI: ffff888052412998
RBP: 00000000000000a2 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: ffffc900043afe08 R14: dffffc0000000000 R15: ffffffff8bb03e50
 __might_fault mm/memory.c:6958 [inline]
 __might_fault+0xbc/0x190 mm/memory.c:6952
 _inline_copy_from_user include/linux/uaccess.h:162 [inline]
 _copy_from_user+0x29/0xd0 lib/usercopy.c:18
 copy_from_user include/linux/uaccess.h:212 [inline]
 get_timespec64+0x8b/0x240 kernel/time/time.c:877
 __do_sys_clock_nanosleep kernel/time/posix-timers.c:1388 [inline]
 __se_sys_clock_nanosleep kernel/time/posix-timers.c:1376 [inline]
 __x64_sys_clock_nanosleep+0x1ce/0x4a0 kernel/time/posix-timers.c:1376
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xcd/0x4c0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fb20c1c14a5
Code: 24 0c 89 3c 24 48 89 4c 24 18 e8 f6 54 ff ff 4c 8b 54 24 18 48 8b 54 24 10 41 89 c0 8b 74 24 0c 8b 3c 24 b8 e6 00 00 00 0f 05 <44> 89 c7 48 89 04 24 e8 4f 55 ff ff 48 8b 04 24 48 83 c4 28 f7 d8
RSP: 002b:00007ffd2e501190 EFLAGS: 00000293 ORIG_RAX: 00000000000000e6
RAX: ffffffffffffffda RBX: 00007fb20c3c5fa0 RCX: 00007fb20c1c14a5
RDX: 00007ffd2e5011d0 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007fb20c3c7da0 R08: 0000000000000000 R09: 00007fb20d047000
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000162ec0
R13: 00007fb20c3c6090 R14: ffffffffffffffff R15: 00007ffd2e501310
 </TASK>
----------------
Code disassembly (best guess):
   0:	8b 05 19 f4 1a 12    	mov    0x121af419(%rip),%eax        # 0x121af41f
   6:	a9 00 01 ff 00       	test   $0xff0100,%eax
   b:	74 1d                	je     0x2a
   d:	f6 c4 01             	test   $0x1,%ah
  10:	74 43                	je     0x55
  12:	a9 00 00 0f 00       	test   $0xf0000,%eax
  17:	75 3c                	jne    0x55
  19:	a9 00 00 f0 00       	test   $0xf00000,%eax
  1e:	75 35                	jne    0x55
  20:	8b 82 3c 16 00 00    	mov    0x163c(%rdx),%eax
  26:	85 c0                	test   %eax,%eax
  28:	74 2b                	je     0x55
* 2a:	8b 82 18 16 00 00    	mov    0x1618(%rdx),%eax <-- trapping instruction
  30:	83 f8 02             	cmp    $0x2,%eax
  33:	75 20                	jne    0x55
  35:	48 8b 8a 20 16 00 00 	mov    0x1620(%rdx),%rcx
  3c:	8b                   	.byte 0x8b
  3d:	92                   	xchg   %eax,%edx
  3e:	1c 16                	sbb    $0x16,%al