------------[ cut here ]------------
ODEBUG: free active (active state 0) object: ffff8880528f4090 object type: timer_list hint: rose_t0timer_expiry+0x0/0x560 net/rose/rose_link.c:-1
WARNING: lib/debugobjects.c:632 at debug_print_object lib/debugobjects.c:629 [inline], CPU#0: syz-executor/11736
WARNING: lib/debugobjects.c:632 at __debug_check_no_obj_freed lib/debugobjects.c:1116 [inline], CPU#0: syz-executor/11736
WARNING: lib/debugobjects.c:632 at debug_check_no_obj_freed+0x405/0x550 lib/debugobjects.c:1146, CPU#0: syz-executor/11736
Modules linked in:
CPU: 0 UID: 0 PID: 11736 Comm: syz-executor Not tainted syzkaller #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026
RIP: 0010:debug_print_object lib/debugobjects.c:629 [inline]
RIP: 0010:__debug_check_no_obj_freed lib/debugobjects.c:1116 [inline]
RIP: 0010:debug_check_no_obj_freed+0x44a/0x550 lib/debugobjects.c:1146
Code: 89 44 24 20 e8 f7 bf 74 fd 48 8b 44 24 20 4c 8b 4d 00 4c 89 ef 48 c7 c6 a0 a5 28 8c 48 c7 c2 20 ab 28 8c 8b 0c 24 4d 89 f8 50 <67> 48 0f b9 3a 48 83 c4 08 4c 8b 6c 24 18 48 b9 00 00 00 00 00 fc
RSP: 0018:ffffc90000007b48 EFLAGS: 00010246
RAX: ffffffff8a9f6db0 RBX: ffffffff9a79d7b8 RCX: 0000000000000000
RDX: ffffffff8c28ab20 RSI: ffffffff8c28a5a0 RDI: ffffffff903e6a40
RBP: ffffffff8bcf39a0 R08: ffff8880528f4090 R09: ffffffff8bcf4d00
R10: dffffc0000000000 R11: ffffffff81b236d0 R12: ffff8880528f4200
R13: ffffffff903e6a40 R14: ffff8880528f4000 R15: ffff8880528f4090
FS: 00005555770e7500(0000) GS:ffff888125213000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f2b5f9456b8 CR3: 0000000056768000 CR4: 00000000003526f0
Call Trace:
slab_free_hook mm/slub.c:2620 [inline]
slab_free mm/slub.c:6246 [inline]
kfree+0x13e/0x640 mm/slub.c:6561
rose_neigh_put include/net/rose.h:166 [inline]
rose_timer_expiry+0x4cb/0x600 net/rose/rose_timer.c:183
call_timer_fn+0x192/0x5e0 kernel/time/timer.c:1748
expire_timers kernel/time/timer.c:1799 [inline]
__run_timers kernel/time/timer.c:2374 [inline]
__run_timer_base+0x652/0x8b0 kernel/time/timer.c:2386
run_timer_base kernel/time/timer.c:2395 [inline]
run_timer_softirq+0xb7/0x170 kernel/time/timer.c:2405
handle_softirqs+0x22a/0x840 kernel/softirq.c:622
__do_softirq kernel/softirq.c:656 [inline]
invoke_softirq kernel/softirq.c:496 [inline]
__irq_exit_rcu+0xca/0x220 kernel/softirq.c:735
irq_exit_rcu+0x9/0x30 kernel/softirq.c:752
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1061 [inline]
sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1061
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:strlen+0x2e/0x70 lib/string.c:420
Code: 41 57 41 56 41 54 53 48 c7 c0 ff ff ff ff 49 be 00 00 00 00 00 fc ff df 48 89 fb 49 89 c7 48 89 d8 48 c1 e8 03 42 0f b6 04 30 <84> c0 75 11 48 ff c3 49 8d 47 01 42 80 7c 3f 01 00 75 de eb 19 89
RSP: 0018:ffffc9000da5e7a8 EFLAGS: 00000a03
RAX: 0000000000000006 RBX: ffffffff8cea53cd RCX: 000000008cea5304
RDX: 0000000000000000 RSI: 00000000fffffffd RDI: ffffffff8cea53c0
RBP: ffffffff8cea58c0 R08: 0000000000000000 R09: 0000000000000000
R10: ffff888055813400 R11: ffffed100ab02682 R12: 0000000000000013
R13: ffff88809a76b040 R14: dffffc0000000000 R15: 000000000000000c
__fortify_strlen include/linux/fortify-string.h:266 [inline]
insert_entry fs/proc/proc_sysctl.c:167 [inline]
insert_header+0xb83/0x1220 fs/proc/proc_sysctl.c:252
__register_sysctl_table+0x11da/0x1340 fs/proc/proc_sysctl.c:1399
__devinet_sysctl_register+0x386/0x490 net/ipv4/devinet.c:2712
devinet_sysctl_register+0x187/0x200 net/ipv4/devinet.c:2752
inetdev_init+0x2a4/0x4e0 net/ipv4/devinet.c:291
inetdev_event+0x30d/0x1610 net/ipv4/devinet.c:1590
notifier_call_chain+0x1ad/0x3d0 kernel/notifier.c:85
call_netdevice_notifiers_extack net/core/dev.c:2287 [inline]
call_netdevice_notifiers net/core/dev.c:2301 [inline]
register_netdevice+0x18c9/0x1ec0 net/core/dev.c:11465
veth_newlink+0x4a4/0xb70 drivers/net/veth.c:1860
rtnl_newlink_create+0x329/0xb70 net/core/rtnetlink.c:3863
__rtnl_newlink net/core/rtnetlink.c:3994 [inline]
rtnl_newlink+0x166a/0x1bb0 net/core/rtnetlink.c:4109
rtnetlink_rcv_msg+0x7d5/0xbe0 net/core/rtnetlink.c:6995
netlink_rcv_skb+0x232/0x4b0 net/netlink/af_netlink.c:2550
netlink_unicast_kernel net/netlink/af_netlink.c:1318 [inline]
netlink_unicast+0x75c/0x8e0 net/netlink/af_netlink.c:1344
netlink_sendmsg+0x813/0xb40 net/netlink/af_netlink.c:1894
sock_sendmsg_nosec net/socket.c:787 [inline]
__sock_sendmsg net/socket.c:802 [inline]
__sys_sendto+0x672/0x710 net/socket.c:2265
__do_sys_sendto net/socket.c:2272 [inline]
__se_sys_sendto net/socket.c:2268 [inline]
__x64_sys_sendto+0xde/0x100 net/socket.c:2268
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0x15f/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f0bdaf5d60e
Code: 08 0f 85 a5 a8 ff ff 49 89 fb 48 89 f0 48 89 d7 48 89 ce 4c 89 c2 4d 89 ca 4c 8b 44 24 08 4c 8b 4c 24 10 4c 89 5c 24 08 0f 05 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 80 00 00 00 00 48 83 ec 08
RSP: 002b:00007ffe497183e8 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 00005555770e7500 RCX: 00007f0bdaf5d60e
RDX: 0000000000000084 RSI: 00007f0bdbd44670 RDI: 0000000000000003
RBP: 0000000000000001 R08: 00007ffe49718464 R09: 000000000000000c
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000003
R13: 0000000000000000 R14: 00007f0bdbd44670 R15: 0000000000000000
----------------
Code disassembly (best guess):
0: 89 44 24 20 mov %eax,0x20(%rsp)
4: e8 f7 bf 74 fd call 0xfd74c000
9: 48 8b 44 24 20 mov 0x20(%rsp),%rax
e: 4c 8b 4d 00 mov 0x0(%rbp),%r9
12: 4c 89 ef mov %r13,%rdi
15: 48 c7 c6 a0 a5 28 8c mov $0xffffffff8c28a5a0,%rsi
1c: 48 c7 c2 20 ab 28 8c mov $0xffffffff8c28ab20,%rdx
23: 8b 0c 24 mov (%rsp),%ecx
26: 4d 89 f8 mov %r15,%r8
29: 50 push %rax
* 2a: 67 48 0f b9 3a ud1 (%edx),%rdi <-- trapping instruction
2f: 48 83 c4 08 add $0x8,%rsp
33: 4c 8b 6c 24 18 mov 0x18(%rsp),%r13
38: 48 rex.W
39: b9 00 00 00 00 mov $0x0,%ecx
3e: 00 fc add %bh,%ah