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ODEBUG: free active (active state 0) object: ffff88805ce8a490 object type: timer_list hint: rose_t0timer_expiry+0x0/0x350
WARNING: CPU: 1 PID: 8148 at lib/debugobjects.c:518 debug_print_object lib/debugobjects.c:515 [inline]
WARNING: CPU: 1 PID: 8148 at lib/debugobjects.c:518 __debug_check_no_obj_freed lib/debugobjects.c:990 [inline]
WARNING: CPU: 1 PID: 8148 at lib/debugobjects.c:518 debug_check_no_obj_freed+0x446/0x540 lib/debugobjects.c:1020
Modules linked in:
CPU: 1 PID: 8148 Comm: syz.0.478 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
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 c0 74 fc 8a 48 c7 c6 20 71 fc 8a 48 c7 c2 40 76 fc 8a 8b 0c 24 4d 89 f8 41 55 e8 6e dd 29 fd 48 83 c4 08 <0f> 0b 4c 8b 6c 24 18 48 b9 00 00 00 00 00 fc ff df ff 05 a3 92 24
RSP: 0018:ffffc900001f0a50 EFLAGS: 00010296
RAX: 423a6b4259f66400 RBX: ffffffff970c5fb0 RCX: ffff88802d398000
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000002
RBP: ffffffff8aac9f00 R08: ffff8880b8f28c13 R09: 1ffff110171e5182
R10: dffffc0000000000 R11: ffffed10171e5183 R12: ffff88805ce8a600
R13: ffffffff89678f70 R14: ffff88805ce8a000 R15: ffff88805ce8a490
FS: 00007f785e2276c0(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055556e36d608 CR3: 000000002d1ff000 CR4: 00000000003506e0
Call Trace:
slab_free_hook mm/slub.c:1786 [inline]
slab_free_freelist_hook+0xd2/0x1b0 mm/slub.c:1837
slab_free mm/slub.c:3830 [inline]
__kmem_cache_free+0xba/0x1f0 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+0x16e/0x530 kernel/time/timer.c:1700
expire_timers kernel/time/timer.c:1751 [inline]
__run_timers+0x52d/0x7d0 kernel/time/timer.c:2022
run_timer_softirq+0x67/0xf0 kernel/time/timer.c:2035
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+0xc7/0x190 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
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:687
RIP: 0010:mmdrop include/linux/sched/mm.h:53 [inline]
RIP: 0010:mmdrop_sched include/linux/sched/mm.h:82 [inline]
RIP: 0010:mmdrop_lazy_tlb_sched include/linux/sched/mm.h:109 [inline]
RIP: 0010:finish_task_switch+0x32e/0x920 kernel/sched/core.c:5279
Code: 28 84 c0 0f 85 b2 02 00 00 f7 03 20 00 00 00 0f 85 97 01 00 00 f3 0f 1e fa 4c 89 ff be 04 00 00 00 e8 76 9c 80 00 f0 41 ff 0f <0f> 84 a4 00 00 00 81 7d a8 80 00 00 00 0f 84 ac 00 00 00 48 83 c4
RSP: 0018:ffffc900189bf5d8 EFLAGS: 00000202
RAX: 0000000000000001 RBX: ffff88801786b9c8 RCX: ffffffff815c504a
RDX: 0000000000000001 RSI: 0000000000000004 RDI: ffff88801786b900
RBP: ffffc900189bf630 R08: ffff88801786b903 R09: 1ffff11002f0d720
R10: dffffc0000000000 R11: ffffed1002f0d721 R12: ffff88802d398540
R13: dffffc0000000000 R14: ffff88801b273c00 R15: ffff88801786b900
context_switch kernel/sched/core.c:5383 [inline]
__schedule+0x14da/0x44d0 kernel/sched/core.c:6699
schedule+0xbd/0x170 kernel/sched/core.c:6773
schedule_timeout+0x9b/0x280 kernel/time/timer.c:2143
do_wait_for_common kernel/sched/completion.c:95 [inline]
__wait_for_common kernel/sched/completion.c:116 [inline]
wait_for_common kernel/sched/completion.c:127 [inline]
wait_for_completion+0x2bd/0x590 kernel/sched/completion.c:148
rdmsr_safe_on_cpu+0x151/0x220 arch/x86/lib/msr-smp.c:183
msr_read+0x151/0x250 arch/x86/kernel/msr.c:66
vfs_read+0x27e/0x920 fs/read_write.c:468
ksys_read+0x147/0x250 fs/read_write.c:613
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:81
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f785d38f6c9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f785e227038 EFLAGS: 00000246 ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: 00007f785d5e5fa0 RCX: 00007f785d38f6c9
RDX: 0000000000018ff8 RSI: 0000200000019680 RDI: 0000000000000003
RBP: 00007f785d411f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f785d5e6038 R14: 00007f785d5e5fa0 R15: 00007ffcca7ec168
----------------
Code disassembly (best guess):
0: 28 84 c0 0f 85 b2 02 sub %al,0x2b2850f(%rax,%rax,8)
7: 00 00 add %al,(%rax)
9: f7 03 20 00 00 00 testl $0x20,(%rbx)
f: 0f 85 97 01 00 00 jne 0x1ac
15: f3 0f 1e fa endbr64
19: 4c 89 ff mov %r15,%rdi
1c: be 04 00 00 00 mov $0x4,%esi
21: e8 76 9c 80 00 call 0x809c9c
26: f0 41 ff 0f lock decl (%r15)
* 2a: 0f 84 a4 00 00 00 je 0xd4 <-- trapping instruction
30: 81 7d a8 80 00 00 00 cmpl $0x80,-0x58(%rbp)
37: 0f 84 ac 00 00 00 je 0xe9
3d: 48 rex.W
3e: 83 .byte 0x83
3f: c4 .byte 0xc4