------------[ cut here ]------------
ODEBUG: free active (active state 0) object type: timer_list hint: rose_transmit_restart_request net/rose/rose_link.c:-1 [inline]
ODEBUG: free active (active state 0) object type: timer_list hint: rose_t0timer_expiry+0x0/0x350 net/rose/rose_link.c:284
WARNING: CPU: 0 PID: 3932 at lib/debugobjects.c:518 debug_print_object lib/debugobjects.c:515 [inline]
WARNING: CPU: 0 PID: 3932 at lib/debugobjects.c:518 __debug_check_no_obj_freed lib/debugobjects.c:979 [inline]
WARNING: CPU: 0 PID: 3932 at lib/debugobjects.c:518 debug_check_no_obj_freed+0x43c/0x530 lib/debugobjects.c:1009
Modules linked in:
CPU: 0 PID: 3932 Comm: dhcpcd Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
RIP: 0010:debug_print_object lib/debugobjects.c:515 [inline]
RIP: 0010:__debug_check_no_obj_freed lib/debugobjects.c:979 [inline]
RIP: 0010:debug_check_no_obj_freed+0x43c/0x530 lib/debugobjects.c:1009
Code: ef e8 48 cc bd fd 4c 8b 45 00 48 c7 c7 c0 18 df 8a 48 c7 c6 80 15 df 8a 48 c7 c2 20 1a df 8a 8b 0c 24 4d 89 e9 e8 34 52 38 fd <0f> 0b 4c 8b 6c 24 18 48 b9 00 00 00 00 00 fc ff df ff 05 a5 7a 0a
RSP: 0018:ffffc90000007a10 EFLAGS: 00010246
RAX: ca3341538bc11e00 RBX: ffffffff96e46d18 RCX: ffff88802fd60000
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000002
RBP: ffffffff8a8def40 R08: ffffffff90af63d7 R09: 1ffffffff215ec7a
R10: dffffc0000000000 R11: fffffbfff215ec7b R12: ffff88807db89200
R13: ffffffff892aadc0 R14: ffff88807db89000 R15: ffff88807db89090
FS: 00007f87e693c740(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f78649bfe9c CR3: 0000000023b56000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
slab_free_hook mm/slub.c:1704 [inline]
slab_free_freelist_hook+0xd2/0x1a0 mm/slub.c:1755
slab_free mm/slub.c:3687 [inline]
__kmem_cache_free+0xb6/0x1f0 mm/slub.c:3700
rose_neigh_put include/net/rose.h:166 [inline]
rose_timer_expiry+0x4a7/0x5d0 net/rose/rose_timer.c:183
call_timer_fn+0x1ac/0x670 kernel/time/timer.c:1701
expire_timers kernel/time/timer.c:1752 [inline]
__run_timers+0x53e/0x800 kernel/time/timer.c:2023
run_timer_softirq+0x63/0xf0 kernel/time/timer.c:2036
handle_softirqs+0x2a1/0x930 kernel/softirq.c:596
__do_softirq kernel/softirq.c:630 [inline]
invoke_softirq kernel/softirq.c:470 [inline]
__irq_exit_rcu+0x13b/0x230 kernel/softirq.c:679
irq_exit_rcu+0x5/0x20 kernel/softirq.c:691
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1118 [inline]
sysvec_apic_timer_interrupt+0xa0/0xc0 arch/x86/kernel/apic/apic.c:1118
asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:691
RIP: 0010:instrument_atomic_read include/linux/instrumented.h:72 [inline]
RIP: 0010:atomic_long_read include/linux/atomic/atomic-instrumented.h:1265 [inline]
RIP: 0010:__mutex_owner kernel/locking/mutex.c:81 [inline]
RIP: 0010:mutex_spin_on_owner+0x286/0x350 kernel/locking/mutex.c:359
Code: 6f 00 42 80 7c 35 00 00 74 08 4c 89 e7 e8 42 bf 6f 00 49 f7 04 24 01 00 00 00 0f 85 8c 00 00 00 f3 90 4c 89 e7 be 08 00 00 00 b5 c0 6f 00 42 80 7c 35 00 00 0f 84 84 fe ff ff 4c 89 e7 e8 11
RSP: 0018:ffffc90003737ae8 EFLAGS: 00000246
RAX: 1ffff11005fac000 RBX: ffffffff8dd469d0 RCX: ffffffff81639db4
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff8dd46980
RBP: 1ffffffff1ba8d30 R08: ffff88802fd60007 R09: 1ffff11005fac000
R10: dffffc0000000000 R11: ffffed1005fac001 R12: ffffffff8dd46980
R13: ffffffff8dd469d0 R14: dffffc0000000000 R15: ffff88807e77bb80
mutex_optimistic_spin kernel/locking/mutex.c:476 [inline]
__mutex_lock_common kernel/locking/mutex.c:607 [inline]
__mutex_lock+0x187/0xaf0 kernel/locking/mutex.c:747
vlan_ioctl_handler+0xef/0x5c0 net/8021q/vlan.c:580
sock_ioctl+0x27a/0x710 net/socket.c:1284
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:870 [inline]
__se_sys_ioctl+0xfa/0x170 fs/ioctl.c:856
do_syscall_x64 arch/x86/entry/common.c:46 [inline]
do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f87e6a3c378
Code: 00 00 48 8d 44 24 08 48 89 54 24 e0 48 89 44 24 c0 48 8d 44 24 d0 48 89 44 24 c8 b8 10 00 00 00 c7 44 24 b8 10 00 00 00 0f 05 <89> c2 3d 00 f0 ff ff 77 07 89 d0 c3 0f 1f 40 00 48 8b 15 49 3a 0d
RSP: 002b:00007ffd34b7ddf8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 000056264313f3a0 RCX: 00007f87e6a3c378
RDX: 00007ffd34b7de00 RSI: 0000000000008982 RDI: 000000000000000f
RBP: 00007ffd34b7de00 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000562643137590 R14: 00007ffd34b7e850 R15: 000056264313f3a0
----------------
Code disassembly (best guess):
0: 6f outsl %ds:(%rsi),(%dx)
1: 00 42 80 add %al,-0x80(%rdx)
4: 7c 35 jl 0x3b
6: 00 00 add %al,(%rax)
8: 74 08 je 0x12
a: 4c 89 e7 mov %r12,%rdi
d: e8 42 bf 6f 00 call 0x6fbf54
12: 49 f7 04 24 01 00 00 testq $0x1,(%r12)
19: 00
1a: 0f 85 8c 00 00 00 jne 0xac
20: f3 90 pause
22: 4c 89 e7 mov %r12,%rdi
25: be 08 00 00 00 mov $0x8,%esi
* 2a: e8 b5 c0 6f 00 call 0x6fc0e4 <-- trapping instruction
2f: 42 80 7c 35 00 00 cmpb $0x0,0x0(%rbp,%r14,1)
35: 0f 84 84 fe ff ff je 0xfffffebf
3b: 4c 89 e7 mov %r12,%rdi
3e: e8 .byte 0xe8
3f: 11 .byte 0x11