INFO: task kworker/u4:2:24 blocked for more than 144 seconds.
      Not tainted 5.7.0-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
kworker/u4:2    D25376    24      2 0x80004000
Workqueue: netns cleanup_net
Call Trace:
 context_switch kernel/sched/core.c:3430 [inline]
 __schedule+0x8f3/0x1fc0 kernel/sched/core.c:4156
 schedule+0xd0/0x2a0 kernel/sched/core.c:4231
 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:4290
 __mutex_lock_common kernel/locking/mutex.c:1033 [inline]
 __mutex_lock+0x7b3/0x13c0 kernel/locking/mutex.c:1103
 ip6gre_exit_batch_net+0x88/0x700 net/ipv6/ip6_gre.c:1602
 ops_exit_list.isra.0+0x103/0x150 net/core/net_namespace.c:189
 cleanup_net+0x511/0xa50 net/core/net_namespace.c:603
 process_one_work+0x965/0x16a0 kernel/workqueue.c:2268
 worker_thread+0x96/0xe20 kernel/workqueue.c:2414
 kthread+0x388/0x470 kernel/kthread.c:268
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:351
INFO: task kworker/1:5:8064 blocked for more than 145 seconds.
      Not tainted 5.7.0-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
kworker/1:5     D27464  8064      2 0x80004000
Workqueue: events linkwatch_event
Call Trace:
 context_switch kernel/sched/core.c:3430 [inline]
 __schedule+0x8f3/0x1fc0 kernel/sched/core.c:4156
 schedule+0xd0/0x2a0 kernel/sched/core.c:4231
 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:4290
 __mutex_lock_common kernel/locking/mutex.c:1033 [inline]
 __mutex_lock+0x7b3/0x13c0 kernel/locking/mutex.c:1103
 linkwatch_event+0xb/0x60 net/core/link_watch.c:250
 process_one_work+0x965/0x16a0 kernel/workqueue.c:2268
 worker_thread+0x96/0xe20 kernel/workqueue.c:2414
 kthread+0x388/0x470 kernel/kthread.c:268
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:351
INFO: task syz-executor.3:8534 blocked for more than 145 seconds.
      Not tainted 5.7.0-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.3  D27264  8534   7248 0x00004004
Call Trace:
 context_switch kernel/sched/core.c:3430 [inline]
 __schedule+0x8f3/0x1fc0 kernel/sched/core.c:4156
 schedule+0xd0/0x2a0 kernel/sched/core.c:4231
 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:4290
 __mutex_lock_common kernel/locking/mutex.c:1033 [inline]
 __mutex_lock+0x7b3/0x13c0 kernel/locking/mutex.c:1103
 sock_do_ioctl+0x24e/0x2f0 net/socket.c:1061
 sock_ioctl+0x3ec/0x790 net/socket.c:1199
 vfs_ioctl fs/ioctl.c:47 [inline]
 ksys_ioctl+0x11a/0x180 fs/ioctl.c:771
 __do_sys_ioctl fs/ioctl.c:780 [inline]
 __se_sys_ioctl fs/ioctl.c:778 [inline]
 __x64_sys_ioctl+0x6f/0xb0 fs/ioctl.c:778
 do_syscall_64+0xf6/0x7d0 arch/x86/entry/common.c:295
 entry_SYSCALL_64_after_hwframe+0x49/0xb3
RIP: 0033:0x45ca59
Code: Bad RIP value.
RSP: 002b:00007f3b73518c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00000000004e9bc0 RCX: 000000000045ca59
RDX: 0000000000400200 RSI: 0000000000008912 RDI: 0000000000000006
RBP: 000000000078bf00 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 0000000000000421 R14: 00000000004c6e6f R15: 00007f3b735196d4
INFO: task syz-executor.4:8594 blocked for more than 146 seconds.
      Not tainted 5.7.0-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.4  D25120  8594   7277 0x00004004
Call Trace:
 context_switch kernel/sched/core.c:3430 [inline]
 __schedule+0x8f3/0x1fc0 kernel/sched/core.c:4156
 schedule+0xd0/0x2a0 kernel/sched/core.c:4231
 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:4290
 __mutex_lock_common kernel/locking/mutex.c:1033 [inline]
 __mutex_lock+0x7b3/0x13c0 kernel/locking/mutex.c:1103
 netdev_run_todo+0x491/0x760 net/core/dev.c:9780
 rtnl_unlock net/core/rtnetlink.c:112 [inline]
 rtnetlink_rcv_msg+0x45b/0xad0 net/core/rtnetlink.c:5462
 netlink_rcv_skb+0x15a/0x430 net/netlink/af_netlink.c:2469
 netlink_unicast_kernel net/netlink/af_netlink.c:1303 [inline]
 netlink_unicast+0x537/0x740 net/netlink/af_netlink.c:1329
 netlink_sendmsg+0x882/0xe10 net/netlink/af_netlink.c:1918
 sock_sendmsg_nosec net/socket.c:652 [inline]
 sock_sendmsg+0xcf/0x120 net/socket.c:672
 ____sys_sendmsg+0x6e6/0x810 net/socket.c:2352
 ___sys_sendmsg+0x100/0x170 net/socket.c:2406
 __sys_sendmsg+0xe5/0x1b0 net/socket.c:2439
 do_syscall_64+0xf6/0x7d0 arch/x86/entry/common.c:295
 entry_SYSCALL_64_after_hwframe+0x49/0xb3
RIP: 0033:0x45ca59
Code: Bad RIP value.
RSP: 002b:00007f0577b72c78 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 0000000000502000 RCX: 000000000045ca59
RDX: 0000000000000000 RSI: 0000000020000080 RDI: 0000000000000005
RBP: 000000000078bfa0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 0000000000000a32 R14: 00000000004cd164 R15: 00007f0577b736d4
INFO: task syz-executor.1:8600 blocked for more than 148 seconds.
      Not tainted 5.7.0-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.1  D28224  8600   6937 0x00000004
Call Trace:
 context_switch kernel/sched/core.c:3430 [inline]
 __schedule+0x8f3/0x1fc0 kernel/sched/core.c:4156
 schedule+0xd0/0x2a0 kernel/sched/core.c:4231
 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:4290
 __mutex_lock_common kernel/locking/mutex.c:1033 [inline]
 __mutex_lock+0x7b3/0x13c0 kernel/locking/mutex.c:1103