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ODEBUG: free active (active state 0) object: ffff8880563f6890 object type: timer_list hint: rose_t0timer_expiry+0x0/0x150 include/linux/skbuff.h:2880
WARNING: CPU: 0 PID: 9100 at lib/debugobjects.c:612 debug_print_object+0x1a2/0x2b0 lib/debugobjects.c:612
Modules linked in:
CPU: 0 UID: 0 PID: 9100 Comm: v4l_id 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: ffff88802be49e00 RSI: ffffffff817a3395 RDI: 0000000000000001
RBP: 0000000000000001 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffffffff8c163d80
R13: ffffffff8bafedc0 R14: ffffffff8a7fb5d0 R15: ffffc90000007b28
FS: 00007f961b579880(0000) GS:ffff8881246b9000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f961b02546e CR3: 0000000030ccf000 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:check_preemption_disabled+0x24/0xe0 lib/smp_processor_id.c:54
Code: 90 90 90 90 90 90 41 54 55 53 48 83 ec 08 65 8b 1d 75 3c 44 08 65 8b 05 6a 3c 44 08 a9 ff ff ff 7f 74 0f 48 83 c4 08 89 d8 5b <5d> 41 5c e9 2f 0d 7e f5 9c 58 f6 c4 02 74 ea 48 89 fd 65 48 8b 05
RSP: 0018:ffffc9001f69f368 EFLAGS: 00000296
RAX: 0000000000000000 RBX: ffffc9001f69f4f8 RCX: ffffc9001f6a0001
RDX: ffffc9001f69f500 RSI: ffffffff8c163100 RDI: ffffffff8c163140
RBP: 0000000000000001 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000001 R11: 00000000000061ee R12: ffffc9001f69f4a8
R13: ffffc9001f69f458 R14: ffffc9001f69f4f8 R15: ffffc9001f69f48c
rcu_is_watching_curr_cpu include/linux/context_tracking.h:128 [inline]
rcu_is_watching+0x12/0xc0 kernel/rcu/tree.c:751
rcu_read_unlock include/linux/rcupdate.h:869 [inline]
class_rcu_destructor include/linux/rcupdate.h:1155 [inline]
unwind_next_frame+0xa86/0x20a0 arch/x86/kernel/unwind_orc.c:479
__unwind_start+0x45f/0x7f0 arch/x86/kernel/unwind_orc.c:758
unwind_start arch/x86/include/asm/unwind.h:64 [inline]
arch_stack_walk+0x73/0x100 arch/x86/kernel/stacktrace.c:24
stack_trace_save+0x8e/0xc0 kernel/stacktrace.c:122
kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
kasan_save_track+0x14/0x30 mm/kasan/common.c:68
unpoison_slab_object mm/kasan/common.c:330 [inline]
__kasan_slab_alloc+0x89/0x90 mm/kasan/common.c:356
kasan_slab_alloc include/linux/kasan.h:250 [inline]
slab_post_alloc_hook mm/slub.c:4180 [inline]
slab_alloc_node mm/slub.c:4229 [inline]
kmem_cache_alloc_noprof+0x1cb/0x3b0 mm/slub.c:4236
anon_vma_chain_alloc mm/rmap.c:142 [inline]
anon_vma_clone+0xd8/0x5c0 mm/rmap.c:288
__split_vma+0x65e/0x1070 mm/vma.c:535
split_vma mm/vma.c:598 [inline]
vma_modify+0xee1/0x2030 mm/vma.c:1631
vma_modify_flags+0x212/0x2d0 mm/vma.c:1649
mprotect_fixup+0x1df/0xb40 mm/mprotect.c:816
do_mprotect_pkey+0x9ca/0xd50 mm/mprotect.c:990
__do_sys_mprotect mm/mprotect.c:1011 [inline]
__se_sys_mprotect mm/mprotect.c:1008 [inline]
__x64_sys_mprotect+0x78/0xc0 mm/mprotect.c:1008
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: 0033:0x7f961b6cd2c7
Code: 89 3d fd 3f 01 00 eb 90 0f 1f 00 f7 d8 89 05 f0 3f 01 00 48 c7 c0 ff ff ff ff eb 91 0f 1f 80 00 00 00 00 b8 0a 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8d 0d c9 3f 01 00 f7 d8 89 01 48 83
RSP: 002b:00007fff0407bec8 EFLAGS: 00000206 ORIG_RAX: 000000000000000a
RAX: ffffffffffffffda RBX: 00007f961b6a1b20 RCX: 00007f961b6cd2c7
RDX: 0000000000000001 RSI: 0000000000001000 RDI: 00007f961b612000
RBP: 00007fff0407c190 R08: 0000000000000000 R09: 00007f961ae6beb0
R10: 00007f961b6a1b20 R11: 0000000000000206 R12: 0000000000000018
R13: 00000114177aca47 R14: 0000000000000000 R15: 00007f961b6e1310
----------------
Code disassembly (best guess):
0: 90 nop
1: 90 nop
2: 90 nop
3: 90 nop
4: 90 nop
5: 90 nop
6: 41 54 push %r12
8: 55 push %rbp
9: 53 push %rbx
a: 48 83 ec 08 sub $0x8,%rsp
e: 65 8b 1d 75 3c 44 08 mov %gs:0x8443c75(%rip),%ebx # 0x8443c8a
15: 65 8b 05 6a 3c 44 08 mov %gs:0x8443c6a(%rip),%eax # 0x8443c86
1c: a9 ff ff ff 7f test $0x7fffffff,%eax
21: 74 0f je 0x32
23: 48 83 c4 08 add $0x8,%rsp
27: 89 d8 mov %ebx,%eax
29: 5b pop %rbx
* 2a: 5d pop %rbp <-- trapping instruction
2b: 41 5c pop %r12
2d: e9 2f 0d 7e f5 jmp 0xf57e0d61
32: 9c pushf
33: 58 pop %rax
34: f6 c4 02 test $0x2,%ah
37: 74 ea je 0x23
39: 48 89 fd mov %rdi,%rbp
3c: 65 gs
3d: 48 rex.W
3e: 8b .byte 0x8b
3f: 05 .byte 0x5