netlink: 756 bytes leftover after parsing attributes in process `syz.4.4883'.
------------[ cut here ]------------
ODEBUG: activate active (active state 1) object: ffff88816eb4dd80 object type: rcu_head hint: 0x0
WARNING: lib/debugobjects.c:632 at debug_print_object+0xec/0x230, CPU#0: syz.4.4883/26202
Modules linked in:
CPU: 0 UID: 0 PID: 26202 Comm: syz.4.4883 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
RIP: 0010:debug_print_object+0x18a/0x230
Code: f8 48 c1 e8 03 80 3c 18 00 74 08 4c 89 ff e8 ad 27 4d fd 4d 8b 0f 4c 89 ef 48 8b 74 24 08 48 89 ea 44 89 e1 4d 89 f0 ff 34 24 <67> 48 0f b9 3a 48 83 c4 08 ff 05 b3 c5 8f 0b 48 83 c4 10 5b 41 5c
RSP: 0018:ffffc9000724ecb0 EFLAGS: 00010246
RAX: 1ffffffff181c86c RBX: dffffc0000000000 RCX: 0000000000000001
RDX: ffffffff8c6dac40 RSI: ffffffff8c6da660 RDI: ffffffff90856bb0
RBP: ffffffff8c6dac40 R08: ffff88816eb4dd80 R09: ffffffff8c0e43c0
R10: dffffc0000000000 R11: fffffbfff20f48f0 R12: 0000000000000001
R13: ffffffff90856bb0 R14: ffff88816eb4dd80 R15: ffffffff8c0e4360
FS:  00007f4bc61f66c0(0000) GS:ffff88818d6cd000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f157a9afff8 CR3: 00000001bf06c000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 debug_object_activate+0x274/0x420
 kvfree_call_rcu+0xb4/0x430
 hwsim_update_pib+0x276/0x400
 hwsim_hw_channel+0x178/0x2b0
 drv_set_channel+0x103/0x280
 mac802154_scan_cleanup_locked+0x116/0x280
 mac802154_abort_scan_locked+0xa3/0xe0
 mac802154_slave_close+0xc9/0x2e0
 __dev_close_many+0x366/0x6e0
 netif_close_many+0x249/0x660
 unregister_netdevice_many_notify+0xb76/0x2140
 unregister_netdevice_queue+0x2f5/0x340
 ieee802154_remove_interfaces+0x162/0x1a0
 ieee802154_unregister_hw+0x62/0xe0
 hwsim_del+0x49c/0x500
 hwsim_del_radio_nl+0x110/0x150
 genl_family_rcv_msg_doit+0x233/0x340
 genl_rcv_msg+0x614/0x7a0
 netlink_rcv_skb+0x226/0x4a0
 genl_rcv+0x28/0x40
 netlink_unicast+0x7bd/0x940
 netlink_sendmsg+0x813/0xb40
 sock_sendmsg_nosec+0x13a/0x180
 ____sys_sendmsg+0x54e/0x850
 ___sys_sendmsg+0x2a5/0x360
 __x64_sys_sendmsg+0x1b1/0x290
 do_syscall_64+0x166/0x520
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f4bc7f9e159
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f4bc61f6028 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f4bc8225fa0 RCX: 00007f4bc7f9e159
RDX: 0000000000000800 RSI: 00002000000001c0 RDI: 000000000000000b
RBP: 00007f4bc803506b R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f4bc8226038 R14: 00007f4bc8225fa0 R15: 00007ffcbc4670d8
 </TASK>
