------------[ cut here ]------------
ODEBUG: free active (active state 0) object: ffff88806bef1490 object type: timer_list hint: rose_t0timer_expiry+0x0/0x350
WARNING: CPU: 1 PID: 10182 at lib/debugobjects.c:518 debug_print_object lib/debugobjects.c:515 [inline]
WARNING: CPU: 1 PID: 10182 at lib/debugobjects.c:518 __debug_check_no_obj_freed lib/debugobjects.c:990 [inline]
WARNING: CPU: 1 PID: 10182 at lib/debugobjects.c:518 debug_check_no_obj_freed+0x446/0x540 lib/debugobjects.c:1020
Modules linked in:
CPU: 1 PID: 10182 Comm: syz.5.8371 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
RIP: 0010:debug_print_object lib/debugobjects.c:515 [inline]
RIP: 0010:__debug_check_no_obj_freed lib/debugobjects.c:990 [inline]
RIP: 0010:debug_check_no_obj_freed+0x446/0x540 lib/debugobjects.c:1020
Code: 4c 8b 4d 00 48 c7 c7 60 93 1c 8b 48 c7 c6 c0 8f 1c 8b 48 c7 c2 e0 94 1c 8b 8b 0c 24 4d 89 f8 41 55 e8 8e 91 1f fd 48 83 c4 08 <0f> 0b 4c 8b 6c 24 18 48 b9 00 00 00 00 00 fc ff df ff 05 b3 f0 59
RSP: 0018:ffffc900001f0a50 EFLAGS: 00010296
RAX: 86fc10e18e500d00 RBX: ffffffff975413d0 RCX: ffff888021f23c00
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000002
RBP: ffffffff8accac00 R08: ffffc900001f0647 R09: 1ffff9200003e0c8
R10: dffffc0000000000 R11: fffff5200003e0c9 R12: ffff88806bef1600
R13: ffffffff897ac5a0 R14: ffff88806bef1000 R15: ffff88806bef1490
FS:  000055557fd6c500(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f49c61456b8 CR3: 000000006836c000 CR4: 00000000003526e0
DR0: ffffffffffffffff DR1: 00000000000001f8 DR2: 0000000000000083
DR3: ffffffffefffff15 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 slab_free_hook mm/slub.c:1786 [inline]
 slab_free_freelist_hook+0xd2/0x1a0 mm/slub.c:1837
 slab_free mm/slub.c:3830 [inline]
 __kmem_cache_free+0xba/0x1e0 mm/slub.c:3843
 rose_neigh_put include/net/rose.h:166 [inline]
 rose_timer_expiry+0x4c6/0x5f0 net/rose/rose_timer.c:183
 call_timer_fn+0x189/0x540 kernel/time/timer.c:1701
 expire_timers kernel/time/timer.c:1752 [inline]
 __run_timers+0x542/0x800 kernel/time/timer.c:2023
 run_timer_softirq+0x67/0xf0 kernel/time/timer.c:2036
 handle_softirqs+0x280/0x820 kernel/softirq.c:578
 __do_softirq kernel/softirq.c:612 [inline]
 invoke_softirq kernel/softirq.c:452 [inline]
 __irq_exit_rcu+0xd3/0x190 kernel/softirq.c:661
 irq_exit_rcu+0x9/0x20 kernel/softirq.c:673
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1088 [inline]
 sysvec_apic_timer_interrupt+0xa4/0xc0 arch/x86/kernel/apic/apic.c:1088
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:687
RIP: 0010:get_sigframe+0x4/0x7d0 arch/x86/kernel/signal.c:77
Code: 58 00 e9 00 ff ff ff e8 ca e0 58 00 e8 e5 c5 57 09 4d 85 e4 74 e7 e8 bb e0 58 00 fb e9 e6 fe ff ff cc cc cc cc cc f3 0f 1e fa <55> 48 89 e5 41 57 41 56 41 55 41 54 53 48 83 e4 e0 48 81 ec e0 00
RSP: 0018:ffffc90003487bf8 EFLAGS: 00000206
RAX: ffffffff812e5479 RBX: ffffc90003487f58 RCX: ffffc90003487d00
RDX: 00000000000001b8 RSI: ffffc90003487f58 RDI: ffffc90003487de0
RBP: ffffc90003487d70 R08: ffffffff8e8b02af R09: 1ffffffff1d16055
R10: dffffc0000000000 R11: fffffbfff1d16056 R12: ffffc90003487de0
R13: dffffc0000000000 R14: 0000000004000000 R15: 1ffff92000690f9c
 x64_setup_rt_frame+0x15e/0xc40 arch/x86/kernel/signal_64.c:175
 setup_rt_frame arch/x86/kernel/signal.c:223 [inline]
 handle_signal arch/x86/kernel/signal.c:267 [inline]
 arch_do_signal_or_restart+0x42c/0x800 arch/x86/kernel/signal.c:312
 exit_to_user_mode_loop+0x70/0x110 kernel/entry/common.c:174
 exit_to_user_mode_prepare+0xee/0x180 kernel/entry/common.c:210
 __syscall_exit_to_user_mode_work kernel/entry/common.c:291 [inline]
 syscall_exit_to_user_mode+0x1a/0x50 kernel/entry/common.c:302
 do_syscall_64+0x61/0xa0 arch/x86/entry/common.c:82
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f3f9379c819
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:00007ffff935c458 EFLAGS: 00000246
RAX: 0000000000000001 RBX: 0000000000000000 RCX: 00007f3f9379c819
RDX: 00000000000f4240 RSI: 0000000000000081 RDI: 00007f3f93a15fa8
RBP: 0000000000001e40 R08: 000000000000000f R09: 0000000000000000
R10: 00007f3f93a15fa0 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f3f93a15fac R14: 00007f3f93a15fa8 R15: 00007f3f93a15fa0
 </TASK>
----------------
Code disassembly (best guess), 2 bytes skipped:
   0:	e9 00 ff ff ff       	jmp    0xffffff05
   5:	e8 ca e0 58 00       	call   0x58e0d4
   a:	e8 e5 c5 57 09       	call   0x957c5f4
   f:	4d 85 e4             	test   %r12,%r12
  12:	74 e7                	je     0xfffffffb
  14:	e8 bb e0 58 00       	call   0x58e0d4
  19:	fb                   	sti
  1a:	e9 e6 fe ff ff       	jmp    0xffffff05
  1f:	cc                   	int3
  20:	cc                   	int3
  21:	cc                   	int3
  22:	cc                   	int3
  23:	cc                   	int3
  24:	f3 0f 1e fa          	endbr64
* 28:	55                   	push   %rbp <-- trapping instruction
  29:	48 89 e5             	mov    %rsp,%rbp
  2c:	41 57                	push   %r15
  2e:	41 56                	push   %r14
  30:	41 55                	push   %r13
  32:	41 54                	push   %r12
  34:	53                   	push   %rbx
  35:	48 83 e4 e0          	and    $0xffffffffffffffe0,%rsp
  39:	48                   	rex.W
  3a:	81                   	.byte 0x81
  3b:	ec                   	in     (%dx),%al
  3c:	e0 00                	loopne 0x3e