INFO: task syz.7.756:7986 blocked for more than 143 seconds. Tainted: G L syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.7.756 state:D stack:0 pid:7986 tgid:7984 ppid:6928 task_flags:0x400140 flags:0x00000001 Call trace: __switch_to+0x2b0/0x6e0 arch/arm64/kernel/process.c:810 (T) context_switch kernel/sched/core.c:5387 [inline] __schedule+0x1b74/0x2d24 kernel/sched/core.c:7188 __schedule_loop kernel/sched/core.c:7267 [inline] schedule+0xa4/0x140 kernel/sched/core.c:7282 schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:7339 __mutex_lock_common+0x98c/0x20f4 kernel/locking/mutex.c:726 __mutex_lock kernel/locking/mutex.c:820 [inline] mutex_lock_nested+0x2c/0x38 kernel/locking/mutex.c:873 rtnl_lock net/core/rtnetlink.c:80 [inline] rtnetlink_rcv_msg+0x5c4/0x984 net/core/rtnetlink.c:7001 netlink_rcv_skb+0x22c/0x410 net/netlink/af_netlink.c:2550 rtnetlink_rcv+0x28/0x38 net/core/rtnetlink.c:7022 netlink_unicast_kernel net/netlink/af_netlink.c:1318 [inline] netlink_unicast+0x610/0x800 net/netlink/af_netlink.c:1344 netlink_sendmsg+0x63c/0x920 net/netlink/af_netlink.c:1894 sock_sendmsg_nosec net/socket.c:787 [inline] __sock_sendmsg+0xc8/0x138 net/socket.c:802 ____sys_sendmsg+0x418/0x70c net/socket.c:2698 ___sys_sendmsg+0x198/0x224 net/socket.c:2752 __sys_sendmsg+0x160/0x214 net/socket.c:2784 __do_sys_sendmsg net/socket.c:2789 [inline] __se_sys_sendmsg net/socket.c:2787 [inline] __arm64_sys_sendmsg+0x80/0x94 net/socket.c:2787 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x244 arch/arm64/kernel/syscall.c:49 el0_svc_common+0xe8/0x23c arch/arm64/kernel/syscall.c:121 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:140 el0_svc+0x60/0x25c arch/arm64/kernel/entry-common.c:723 el0t_64_sync_handler+0x48/0x148 arch/arm64/kernel/entry-common.c:742 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:594 Showing all locks held in the system: 1 lock held by kthreadd/2: 2 locks held by kworker/0:0/9: