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ODEBUG: free active (active state 0) object: ffff88814d701c90 object type: timer_list hint: rose_t0timer_expiry+0x0/0x350 net/rose/rose_link.c:-1
WARNING: CPU: 0 PID: 16602 at lib/debugobjects.c:615 debug_print_object+0x16b/0x1e0 lib/debugobjects.c:612
Modules linked in:
CPU: 0 UID: 0 PID: 16602 Comm: syz-executor 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+0x16b/0x1e0 lib/debugobjects.c:612
Code: 4c 89 ff e8 97 e8 52 fd 4d 8b 0f 48 c7 c7 20 40 e3 8b 48 8b 34 24 4c 89 ea 89 e9 4d 89 f0 41 54 e8 2a 1e b3 fc 48 83 c4 08 90 <0f> 0b 90 90 ff 05 67 8a d3 0a 48 83 c4 08 5b 41 5c 41 5d 41 5e 41
RSP: 0018:ffffc90000007a10 EFLAGS: 00010292
RAX: 923988c0fab87d00 RBX: dffffc0000000000 RCX: ffff888058053c00
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000002
RBP: 0000000000000000 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffffbfff1bfa1ec R12: ffffffff8a6c9760
R13: ffffffff8be341a0 R14: ffff88814d701c90 R15: ffffffff8b8cdfa0
FS: 00005555590ad500(0000) GS:ffff888125c1b000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f9ba21746a0 CR3: 000000007b0fa000 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:2348 [inline]
slab_free mm/slub.c:4680 [inline]
kfree+0x112/0x440 mm/slub.c:4879
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:579
__do_softirq kernel/softirq.c:613 [inline]
invoke_softirq kernel/softirq.c:453 [inline]
__irq_exit_rcu+0xca/0x1f0 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+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1050
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:instrument_atomic_read include/linux/instrumented.h:68 [inline]
RIP: 0010:atomic_long_read include/linux/atomic/atomic-instrumented.h:3188 [inline]
RIP: 0010:__mutex_owner kernel/locking/mutex.h:47 [inline]
RIP: 0010:mutex_spin_on_owner+0x27b/0x360 kernel/locking/mutex.c:347
Code: be 08 00 00 00 e8 f5 38 86 00 42 80 7c 35 00 00 74 08 4c 89 e7 e8 75 36 86 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 e8 c8 38 86 00 42 80 7c 35 00 00 0f 84 90
RSP: 0018:ffffc90002f87428 EFLAGS: 00000246
RAX: 1ffff1100b00a780 RBX: ffffffff8f5381f0 RCX: ffffffff819cde28
RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001
RBP: 1ffffffff1ea7034 R08: ffffffff8f5381a7 R09: 1ffffffff1ea7034
R10: dffffc0000000000 R11: fffffbfff1ea7035 R12: ffffffff8f5381a0
R13: ffffffff8f5381f0 R14: dffffc0000000000 R15: ffff88802e855a00
mutex_optimistic_spin kernel/locking/mutex.c:464 [inline]
__mutex_lock_common kernel/locking/mutex.c:602 [inline]
__mutex_lock+0x311/0x1350 kernel/locking/mutex.c:760
rtnl_net_lock include/linux/rtnetlink.h:130 [inline]
inet_rtm_newaddr+0x3b0/0x18b0 net/ipv4/devinet.c:979
rtnetlink_rcv_msg+0x7cc/0xb70 net/core/rtnetlink.c:6946
netlink_rcv_skb+0x208/0x470 net/netlink/af_netlink.c:2552
netlink_unicast_kernel net/netlink/af_netlink.c:1320 [inline]
netlink_unicast+0x82c/0x9e0 net/netlink/af_netlink.c:1346
netlink_sendmsg+0x805/0xb30 net/netlink/af_netlink.c:1896
sock_sendmsg_nosec net/socket.c:714 [inline]
__sock_sendmsg+0x21c/0x270 net/socket.c:729
__sys_sendto+0x3bd/0x520 net/socket.c:2228
__do_sys_sendto net/socket.c:2235 [inline]
__se_sys_sendto net/socket.c:2231 [inline]
__x64_sys_sendto+0xde/0x100 net/socket.c:2231
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fdb09b90a7c
Code: 2a 5f 02 00 44 8b 4c 24 2c 4c 8b 44 24 20 89 c5 44 8b 54 24 28 48 8b 54 24 18 b8 2c 00 00 00 48 8b 74 24 10 8b 7c 24 08 0f 05 <48> 3d 00 f0 ff ff 77 34 89 ef 48 89 44 24 08 e8 70 5f 02 00 48 8b
RSP: 002b:00007ffd21c05820 EFLAGS: 00000293 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 00007fdb0a8e4620 RCX: 00007fdb09b90a7c
RDX: 0000000000000028 RSI: 00007fdb0a8e4670 RDI: 0000000000000003
RBP: 0000000000000000 R08: 00007ffd21c05874 R09: 000000000000000c
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000003
R13: 0000000000000000 R14: 00007fdb0a8e4670 R15: 0000000000000000
----------------
Code disassembly (best guess):
0: be 08 00 00 00 mov $0x8,%esi
5: e8 f5 38 86 00 call 0x8638ff
a: 42 80 7c 35 00 00 cmpb $0x0,0x0(%rbp,%r14,1)
10: 74 08 je 0x1a
12: 4c 89 e7 mov %r12,%rdi
15: e8 75 36 86 00 call 0x86368f
1a: 49 f7 04 24 01 00 00 testq $0x1,(%r12)
21: 00
22: 0f 85 8c 00 00 00 jne 0xb4
28: f3 90 pause
* 2a: 4c 89 e7 mov %r12,%rdi <-- trapping instruction
2d: be 08 00 00 00 mov $0x8,%esi
32: e8 c8 38 86 00 call 0x8638ff
37: 42 80 7c 35 00 00 cmpb $0x0,0x0(%rbp,%r14,1)
3d: 0f .byte 0xf
3e: 84 .byte 0x84
3f: 90 nop