syzbot

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ODEBUG: free active (active state 0) object: ffff88805283cc90 object type: timer_list hint: rose_t0timer_expiry+0x0/0x350 net/rose/rose_link.c:-1
WARNING: CPU: 1 PID: 8499 at lib/debugobjects.c:615 debug_print_object+0x16b/0x1e0 lib/debugobjects.c:612
Modules linked in:
CPU: 1 UID: 0 PID: 8499 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 47 d4 52 fd 4d 8b 0f 48 c7 c7 a0 41 e3 8b 48 8b 34 24 4c 89 ea 89 e9 4d 89 f0 41 54 e8 aa 04 b3 fc 48 83 c4 08 90 <0f> 0b 90 90 ff 05 d7 7a d3 0a 48 83 c4 08 5b 41 5c 41 5d 41 5e 41
RSP: 0018:ffffc90000a08a10 EFLAGS: 00010292
RAX: 83d35ad7a9b77700 RBX: dffffc0000000000 RCX: ffff888027008000
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000002
RBP: 0000000000000000 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffffbfff1bfa1ec R12: ffffffff8a6cb500
R13: ffffffff8be34320 R14: ffff88805283cc90 R15: ffffffff8b8cdfa0
FS:  000055558f2a9500(0000) GS:ffff888125d18000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffc5ceb4000 CR3: 000000005cb9b000 CR4: 0000000000350ef0
Call Trace:
 <IRQ>
 __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+0x286/0x870 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
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:__orc_find arch/x86/kernel/unwind_orc.c:102 [inline]
RIP: 0010:orc_find arch/x86/kernel/unwind_orc.c:227 [inline]
RIP: 0010:unwind_next_frame+0x131f/0x2390 arch/x86/kernel/unwind_orc.c:494
Code: 00 49 01 ef 4c 89 f8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df 0f b6 04 08 84 c0 75 27 49 63 07 4c 01 f8 49 8d 4f 04 4c 39 e0 <48> 0f 46 e9 49 8d 47 fc 48 0f 47 d8 4d 0f 46 ef 48 39 dd 76 a2 e9
RSP: 0018:ffffc9000432e3d8 EFLAGS: 00000293
RAX: ffffffff8957cdb8 RBX: ffffffff9010f9d4 RCX: ffffffff9010f9d8
RDX: ffffffff9010f9d4 RSI: ffffffff90b9bdc0 RDI: ffffffff8be337a0
RBP: ffffffff9010f9d4 R08: 0000000000000003 R09: ffffffff8172c195
R10: dffffc0000000000 R11: ffffffff81ac3820 R12: ffffffff8957d16c
R13: ffffffff9010f9d4 R14: ffffc9000432e4a8 R15: ffffffff9010f9d4
 arch_stack_walk+0x11c/0x150 arch/x86/kernel/stacktrace.c:25
 stack_trace_save+0x9c/0xe0 kernel/stacktrace.c:122
 kasan_save_stack mm/kasan/common.c:47 [inline]
 kasan_save_track+0x3e/0x80 mm/kasan/common.c:68
 kasan_save_free_info+0x46/0x50 mm/kasan/generic.c:576
 poison_slab_object mm/kasan/common.c:243 [inline]
 __kasan_slab_free+0x5b/0x80 mm/kasan/common.c:275
 kasan_slab_free include/linux/kasan.h:233 [inline]
 slab_free_hook mm/slub.c:2417 [inline]
 slab_free mm/slub.c:4680 [inline]
 kmem_cache_free+0x18f/0x400 mm/slub.c:4782
 netlink_broadcast_filtered+0x1188/0x12c0 net/netlink/af_netlink.c:1537
 netlink_broadcast+0x37/0x50 net/netlink/af_netlink.c:1559
 uevent_net_broadcast_tagged lib/kobject_uevent.c:373 [inline]
 kobject_uevent_net_broadcast+0x4bc/0x560 lib/kobject_uevent.c:413
 kobject_uevent_env+0x55b/0x8c0 lib/kobject_uevent.c:608
 rx_queue_add_kobject net/core/net-sysfs.c:1278 [inline]
 net_rx_queue_update_kobjects+0x3e5/0x740 net/core/net-sysfs.c:1320
 register_queue_kobjects net/core/net-sysfs.c:2112 [inline]
 netdev_register_kobject+0x21f/0x310 net/core/net-sysfs.c:2360
 register_netdevice+0x126c/0x1ae0 net/core/dev.c:11206
 veth_newlink+0x42f/0xa50 drivers/net/veth.c:1855
 rtnl_newlink_create+0x310/0xb00 net/core/rtnetlink.c:3825
 __rtnl_newlink net/core/rtnetlink.c:3942 [inline]
 rtnl_newlink+0x16d6/0x1c70 net/core/rtnetlink.c:4057
 rtnetlink_rcv_msg+0x7cf/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+0x82f/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: 0033:0x7fae13190a7c
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:00007ffc9d19b3a0 EFLAGS: 00000293 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 00007fae13ef4620 RCX: 00007fae13190a7c
RDX: 0000000000000064 RSI: 00007fae13ef4670 RDI: 0000000000000003
RBP: 0000000000000000 R08: 00007ffc9d19b3f4 R09: 000000000000000c
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000003
R13: 0000000000000000 R14: 00007fae13ef4670 R15: 0000000000000000
 </TASK>
----------------
Code disassembly (best guess):
   0:	00 49 01             	add    %cl,0x1(%rcx)
   3:	ef                   	out    %eax,(%dx)
   4:	4c 89 f8             	mov    %r15,%rax
   7:	48 c1 e8 03          	shr    $0x3,%rax
   b:	48 b9 00 00 00 00 00 	movabs $0xdffffc0000000000,%rcx
  12:	fc ff df
  15:	0f b6 04 08          	movzbl (%rax,%rcx,1),%eax
  19:	84 c0                	test   %al,%al
  1b:	75 27                	jne    0x44
  1d:	49 63 07             	movslq (%r15),%rax
  20:	4c 01 f8             	add    %r15,%rax
  23:	49 8d 4f 04          	lea    0x4(%r15),%rcx
  27:	4c 39 e0             	cmp    %r12,%rax
* 2a:	48 0f 46 e9          	cmovbe %rcx,%rbp <-- trapping instruction
  2e:	49 8d 47 fc          	lea    -0x4(%r15),%rax
  32:	48 0f 47 d8          	cmova  %rax,%rbx
  36:	4d 0f 46 ef          	cmovbe %r15,%r13
  3a:	48 39 dd             	cmp    %rbx,%rbp
  3d:	76 a2                	jbe    0xffffffe1
  3f:	e9                   	.byte 0xe9