------------[ cut here ]------------
ODEBUG: free active (active state 0) object: ffff888055bfbc90 object type: timer_list hint: rose_t0timer_expiry+0x0/0x150 include/linux/skbuff.h:2927
WARNING: CPU: 0 PID: 23062 at lib/debugobjects.c:612 debug_print_object+0x1a2/0x2b0 lib/debugobjects.c:612
Modules linked in:
CPU: 0 UID: 0 PID: 23062 Comm: syz.7.4755 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+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 20 7f f0 8b 4c 89 e6 48 c7 c7 a0 73 f0 8b e8 af e0 ce fc 90 <0f> 0b 90 90 58 83 05 b6 ca d5 0b 01 48 83 c4 18 5b 5d 41 5c 41 5d
RSP: 0000:ffffc90000007a18 EFLAGS: 00010282
RAX: 0000000000000000 RBX: 0000000000000003 RCX: ffffffff817b3ee8
RDX: ffff888028034900 RSI: ffffffff817b3ef5 RDI: 0000000000000001
RBP: 0000000000000001 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: fffffffffffe0fd8 R12: ffffffff8bf07a40
R13: ffffffff8b901fe0 R14: ffffffff8a4d6ce0 R15: ffffc90000007b18
FS: 00005555661df500(0000) GS:ffff888124a0a000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 0000000040c7a000 CR4: 00000000003526f0
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:2470 [inline]
slab_free mm/slub.c:6630 [inline]
kfree+0x291/0x6d0 mm/slub.c:6837
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:622
__do_softirq kernel/softirq.c:656 [inline]
invoke_softirq kernel/softirq.c:496 [inline]
__irq_exit_rcu+0x109/0x170 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+0xa4/0xc0 arch/x86/kernel/apic/apic.c:1052
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:finish_task_switch.isra.0+0x22a/0xc10 kernel/sched/core.c:5193
Code: fb 09 00 00 44 8b 05 39 ef f7 0e 45 85 c0 0f 85 be 01 00 00 4c 89 e7 e8 a4 f6 ff ff e8 0f d5 3a 00 fb 65 48 8b 1d de 27 17 12 <48> 8d bb 58 16 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1
RSP: 0000:ffffc90003fa7ce0 EFLAGS: 00000202
RAX: 00000000000043bf RBX: ffff888028034900 RCX: ffffffff81c50c3f
RDX: 0000000000000000 RSI: ffffffff8da2a287 RDI: ffffffff8bf06e40
RBP: ffffc90003fa7d28 R08: 0000000000000001 R09: 0000000000000001
R10: ffffffff9081f6d7 R11: 0000000000000001 R12: ffff8880b843a380
R13: ffff88802f28a480 R14: ffff8880b843a380 R15: ffff8880b843b1b0
context_switch kernel/sched/core.c:5328 [inline]
__schedule+0x1198/0x5de0 kernel/sched/core.c:6929
__schedule_loop kernel/sched/core.c:7011 [inline]
schedule+0xe7/0x3a0 kernel/sched/core.c:7026
exit_to_user_mode_loop kernel/entry/common.c:31 [inline]
exit_to_user_mode_prepare include/linux/irq-entry-common.h:225 [inline]
irqentry_exit_to_user_mode+0x11a/0x310 kernel/entry/common.c:73
asm_sysvec_reschedule_ipi+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0033:0x7f4241c6fa40
Code: 75 c8 e9 c7 fc ff ff 48 39 e8 0f 84 e4 fc ff ff 48 8d 50 10 48 39 d5 74 1a 90 48 8b 0a 48 39 08 74 08 48 89 48 08 48 83 c0 08 <48> 83 c2 08 48 39 ea 75 e7 48 8d 68 08 e9 b8 fc ff ff 4c 89 e6 49
RSP: 002b:00007ffea4451930 EFLAGS: 00000246
RAX: 00007f42413ff458 RBX: 00007f4242b15720 RCX: ffffffff897eb665
RDX: 00007f4241516c30 RSI: ffffffff812bf613 RDI: 00007f42413fd008
RBP: 00007f42417fd000 R08: 00007f42413fd0f0 R09: 00007f4241fd2000
R10: 00007f42413fd008 R11: 0000000000000012 R12: 00007f42417fd000
R13: 00007f4241fe6128 R14: 00007ffea44519f8 R15: 00007f42413fd008
----------------
Code disassembly (best guess):
0: fb sti
1: 09 00 or %eax,(%rax)
3: 00 44 8b 05 add %al,0x5(%rbx,%rcx,4)
7: 39 ef cmp %ebp,%edi
9: f7 0e 45 85 c0 0f testl $0xfc08545,(%rsi)
f: 85 be 01 00 00 4c test %edi,0x4c000001(%rsi)
15: 89 e7 mov %esp,%edi
17: e8 a4 f6 ff ff call 0xfffff6c0
1c: e8 0f d5 3a 00 call 0x3ad530
21: fb sti
22: 65 48 8b 1d de 27 17 mov %gs:0x121727de(%rip),%rbx # 0x12172808
29: 12
* 2a: 48 8d bb 58 16 00 00 lea 0x1658(%rbx),%rdi <-- trapping instruction
31: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax
38: fc ff df
3b: 48 89 fa mov %rdi,%rdx
3e: 48 rex.W
3f: c1 .byte 0xc1