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ODEBUG: free active (active state 0) object: ffff888055d11490 object type: timer_list hint: rose_t0timer_expiry+0x0/0x150 include/linux/skbuff.h:2880
WARNING: CPU: 0 PID: 0 at lib/debugobjects.c:612 debug_print_object+0x1a2/0x2b0 lib/debugobjects.c:612
Modules linked in:
CPU: 0 UID: 0 PID: 0 Comm: swapper/0 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 42 16 8c 4c 89 e6 48 c7 c7 e0 36 16 8c e8 7f 3a 91 fc 90 <0f> 0b 90 90 58 83 05 c6 ce c2 0b 01 48 83 c4 18 5b 5d 41 5c 41 5d
RSP: 0018:ffffc90000007a28 EFLAGS: 00010286
RAX: 0000000000000000 RBX: 0000000000000003 RCX: ffffffff817a3388
RDX: ffffffff8e2977c0 RSI: ffffffff817a3395 RDI: 0000000000000001
RBP: 0000000000000001 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffffffff8c163d80
R13: ffffffff8bafedc0 R14: ffffffff8a7fb5d0 R15: ffffc90000007b28
FS: 0000000000000000(0000) GS:ffff8881246b9000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffe98397528 CR3: 0000000012477000 CR4: 0000000000350ef0
Call Trace:
__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+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: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
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:flush_smp_call_function_queue+0x15f/0x1e0 kernel/smp.c:626
Code: 75 46 e8 e4 e2 0b 00 e8 ff c9 13 00 9c 5b 81 e3 00 02 00 00 31 ff 48 89 de e8 3d de 0b 00 48 85 db 75 4a e8 c3 e2 0b 00 fb 5b <5d> e9 bb e2 0b 00 e8 b6 e2 0b 00 e8 e1 90 cc ff 31 f6 31 ff e8 18
RSP: 0018:ffffffff8e207e10 EFLAGS: 00000293
RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff81afaae3
RDX: ffffffff8e2977c0 RSI: ffffffff81afaaed RDI: 0000000000000007
RBP: 0000000000000000 R08: 0000000000000007 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000000
R13: ffffffff8e2977c0 R14: ffffffff90ab9490 R15: 0000000000000000
do_idle+0x2b1/0x510 kernel/sched/idle.c:357
cpu_startup_entry+0x4f/0x60 kernel/sched/idle.c:428
rest_init+0x16b/0x2b0 init/main.c:744
start_kernel+0x3ee/0x4d0 init/main.c:1097
x86_64_start_reservations+0x18/0x30 arch/x86/kernel/head64.c:307
x86_64_start_kernel+0x130/0x190 arch/x86/kernel/head64.c:288
common_startup_64+0x13e/0x148
----------------
Code disassembly (best guess):
0: 75 46 jne 0x48
2: e8 e4 e2 0b 00 call 0xbe2eb
7: e8 ff c9 13 00 call 0x13ca0b
c: 9c pushf
d: 5b pop %rbx
e: 81 e3 00 02 00 00 and $0x200,%ebx
14: 31 ff xor %edi,%edi
16: 48 89 de mov %rbx,%rsi
19: e8 3d de 0b 00 call 0xbde5b
1e: 48 85 db test %rbx,%rbx
21: 75 4a jne 0x6d
23: e8 c3 e2 0b 00 call 0xbe2eb
28: fb sti
29: 5b pop %rbx
* 2a: 5d pop %rbp <-- trapping instruction
2b: e9 bb e2 0b 00 jmp 0xbe2eb
30: e8 b6 e2 0b 00 call 0xbe2eb
35: e8 e1 90 cc ff call 0xffcc911b
3a: 31 f6 xor %esi,%esi
3c: 31 ff xor %edi,%edi
3e: e8 .byte 0xe8
3f: 18 .byte 0x18