INFO: task dhcpcd:5352 blocked for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:dhcpcd          state:D stack:21736 pid:5352  tgid:5352  ppid:5351   task_flags:0x400140 flags:0x00080000
Call Trace:
 <TASK>
 __schedule+0x17d9/0x56c0
 schedule+0x164/0x2b0
 schedule_preempt_disabled+0x13/0x30
 __mutex_lock+0x7bf/0x1550
 dev_ioctl+0x7a4/0x1150
 sock_do_ioctl+0x23e/0x320
 sock_ioctl+0x57a/0x7e0
 __se_sys_ioctl+0xfc/0x170
 do_syscall_64+0x174/0x580
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fa34499dd49
RSP: 002b:00007ffd6a071098 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fa3448cf6c0 RCX: 00007fa34499dd49
RDX: 00007ffd6a081288 RSI: 0000000000008922 RDI: 0000000000000016
RBP: 00007ffd6a091448 R08: 00007ffd6a081248 R09: 00007ffd6a0811f8
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffd6a081288 R14: 0000000000000028 R15: 0000000000008922
 </TASK>

Showing all locks held in the system:
3 locks held by kworker/u8:0/12:
 #0: ffff88816d72f940 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_scheduled_works+0xa20/0x14e0
 #1: ffffc90000117c40 ((work_completion)(&(&net->ipv6.addr_chk_work)->work)){+.+.}-{0:0}, at: process_scheduled_works+0xa20/0x14e0
 #2: ffffffff8fded380 (rtnl_mutex){+.+.}-{4:4}, at: addrconf_verify_work+0x19/0x30
6 locks held by kworker/u8:1/13:
3 locks held by kworker/u9:1/32:
1 lock held by khungtaskd/35:
