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ODEBUG: free active (active state 0) object: ffff8880574aa090 object type: timer_list hint: rose_t0timer_expiry+0x0/0x350 net/rose/rose_link.c:-1
WARNING: CPU: 0 PID: 19973 at lib/debugobjects.c:615 debug_print_object+0x16b/0x1e0 lib/debugobjects.c:612
Modules linked in:
CPU: 0 UID: 0 PID: 19973 Comm: syz.8.3983 Not tainted syzkaller #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
RIP: 0010:debug_print_object+0x16b/0x1e0 lib/debugobjects.c:612
Code: 4c 89 ff e8 37 f9 8b fd 4d 8b 0f 48 c7 c7 80 7e c0 8b 48 8b 34 24 4c 89 ea 89 e9 4d 89 f0 41 54 e8 fa 77 e9 fc 48 83 c4 08 90 <0f> 0b 90 90 ff 05 77 06 05 0b 48 83 c4 08 5b 41 5c 41 5d 41 5e 41
RSP: 0018:ffffc90000007a00 EFLAGS: 00010296
RAX: e92e82f17a6be400 RBX: dffffc0000000000 RCX: ffff888030d7dac0
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000002
RBP: 0000000000000000 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffffbfff1bfa658 R12: ffffffff8a3e0c80
R13: ffffffff8bc08000 R14: ffff8880574aa090 R15: ffffffff8b6cf600
FS: 000055555886b500(0000) GS:ffff888125d0f000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055555887e588 CR3: 000000007a05a000 CR4: 00000000003526f0
Call Trace:
__debug_check_no_obj_freed lib/debugobjects.c:1099 [inline]
debug_check_no_obj_freed+0x3a2/0x470 lib/debugobjects.c:1129
slab_free_hook mm/slub.c:2446 [inline]
slab_free mm/slub.c:6574 [inline]
kfree+0x115/0x6d0 mm/slub.c:6781
rose_neigh_put include/net/rose.h:166 [inline]
rose_timer_expiry+0x4cb/0x600 net/rose/rose_timer.c:183
call_timer_fn+0x17e/0x5f0 kernel/time/timer.c:1747
expire_timers kernel/time/timer.c:1798 [inline]
__run_timers kernel/time/timer.c:2372 [inline]
__run_timer_base+0x61a/0x860 kernel/time/timer.c:2384
run_timer_base kernel/time/timer.c:2393 [inline]
run_timer_softirq+0xb7/0x180 kernel/time/timer.c:2403
handle_softirqs+0x283/0x870 kernel/softirq.c:622
__do_softirq kernel/softirq.c:656 [inline]
invoke_softirq kernel/softirq.c:496 [inline]
__irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:723
irq_exit_rcu+0x9/0x30 kernel/softirq.c:739
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1052 [inline]
sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1052
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:current_save_fsgs+0x1f4/0x3a0 arch/x86/kernel/process_64.c:305
Code: 4d 85 f6 75 16 e8 cc e3 5a 00 eb 15 e8 c5 e3 5a 00 e8 00 92 e6 09 4d 85 f6 74 ea e8 b6 e3 5a 00 fb 48 c7 44 24 20 0e 36 e0 45 <4b> c7 04 2f 00 00 00 00 66 43 c7 44 2f 09 00 00 43 c6 44 2f 0b 00
RSP: 0018:ffffc9000bf37840 EFLAGS: 00000293
RAX: ffffffff8164b04a RBX: 0000000000000000 RCX: ffff888030d7dac0
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc9000bf37918 R08: ffffffff8f9e0f77 R09: 1ffffffff1f3c1ee
R10: dffffc0000000000 R11: fffffbfff1f3c1ef R12: dffffc0000000000
R13: dffffc0000000000 R14: 0000000000000200 R15: 1ffff920017e6f0c
copy_thread+0x197/0x9a0 arch/x86/kernel/process.c:194
copy_process+0x18ae/0x3c00 kernel/fork.c:2190
kernel_clone+0x21e/0x840 kernel/fork.c:2609
__do_sys_clone3 kernel/fork.c:2911 [inline]
__se_sys_clone3+0x256/0x2d0 kernel/fork.c:2890
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xfa/0xfa0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fc421fc3609
Code: d7 08 00 48 8d 3d 9c d7 08 00 e8 e2 28 f6 ff 66 90 b8 ea ff ff ff 48 85 ff 74 2c 48 85 d2 74 27 49 89 c8 b8 b3 01 00 00 0f 05 <48> 85 c0 7c 18 74 01 c3 31 ed 48 83 e4 f0 4c 89 c7 ff d2 48 89 c7
RSP: 002b:00007ffcbb119458 EFLAGS: 00000206 ORIG_RAX: 00000000000001b3
RAX: ffffffffffffffda RBX: 00007fc421f459f0 RCX: 00007fc421fc3609
RDX: 00007fc421f459f0 RSI: 0000000000000058 RDI: 00007ffcbb1194a0
RBP: 00007fc4201f66c0 R08: 00007fc4201f66c0 R09: 00007ffcbb119587
R10: 0000000000000008 R11: 0000000000000206 R12: ffffffffffffffa8
R13: 000000000000000b R14: 00007ffcbb1194a0 R15: 00007ffcbb119588
----------------
Code disassembly (best guess):
0: 4d 85 f6 test %r14,%r14
3: 75 16 jne 0x1b
5: e8 cc e3 5a 00 call 0x5ae3d6
a: eb 15 jmp 0x21
c: e8 c5 e3 5a 00 call 0x5ae3d6
11: e8 00 92 e6 09 call 0x9e69216
16: 4d 85 f6 test %r14,%r14
19: 74 ea je 0x5
1b: e8 b6 e3 5a 00 call 0x5ae3d6
20: fb sti
21: 48 c7 44 24 20 0e 36 movq $0x45e0360e,0x20(%rsp)
28: e0 45
* 2a: 4b c7 04 2f 00 00 00 movq $0x0,(%r15,%r13,1) <-- trapping instruction
31: 00
32: 66 43 c7 44 2f 09 00 movw $0x0,0x9(%r15,%r13,1)
39: 00
3a: 43 c6 44 2f 0b 00 movb $0x0,0xb(%r15,%r13,1)