INFO: task kworker/1:3:3192 blocked for more than 143 seconds.
      Not tainted 5.10.0-rc5-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/1:3     state:D stack:27120 pid: 3192 ppid:     2 flags:0x00004000
Workqueue: events mptcp_worker
Call Trace:
 context_switch kernel/sched/core.c:3779 [inline]
 __schedule+0x893/0x2130 kernel/sched/core.c:4528
 schedule+0xcf/0x270 kernel/sched/core.c:4606
 __lock_sock+0x13d/0x260 net/core/sock.c:2499
 lock_sock_nested+0xf1/0x110 net/core/sock.c:3038
 lock_sock include/net/sock.h:1590 [inline]
 mptcp_worker+0xa6/0x17a0 net/mptcp/protocol.c:2221
 process_one_work+0x933/0x15a0 kernel/workqueue.c:2272
 worker_thread+0x64c/0x1120 kernel/workqueue.c:2418
 kthread+0x3b1/0x4a0 kernel/kthread.c:292
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296

Showing all locks held in the system:
4 locks held by kworker/u4:0/8:
1 lock held by khungtaskd/1657:
 #0: ffffffff8b3378e0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6254
2 locks held by kworker/1:3/3192:
 #0: ffff888010064d38 ((wq_completion)events){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
 #0: ffff888010064d38 ((wq_completion)events){+.+.}-{0:0}, at: atomic64_set include/asm-generic/atomic-instrumented.h:856 [inline]
 #0: ffff888010064d38 ((wq_completion)events){+.+.}-{0:0}, at: atomic_long_set include/asm-generic/atomic-long.h:41 [inline]
 #0: ffff888010064d38 ((wq_completion)events){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:616 [inline]
 #0: ffff888010064d38 ((wq_completion)events){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:643 [inline]
 #0: ffff888010064d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x821/0x15a0 kernel/workqueue.c:2243
 #1: ffffc90001aafda8 ((work_completion)(&msk->work)){+.+.}-{0:0}, at: process_one_work+0x854/0x15a0 kernel/workqueue.c:2247
1 lock held by in:imklog/8197:
 #0: ffff8880112e4ff0 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 fs/file.c:932
2 locks held by syz-executor.1/14037:

=============================================

NMI backtrace for cpu 1
CPU: 1 PID: 1657 Comm: khungtaskd Not tainted 5.10.0-rc5-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x107/0x163 lib/dump_stack.c:118
 nmi_cpu_backtrace.cold+0x44/0xd7 lib/nmi_backtrace.c:105
 nmi_trigger_cpumask_backtrace+0x1b3/0x230 lib/nmi_backtrace.c:62
 trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline]
 check_hung_uninterruptible_tasks kernel/hung_task.c:209 [inline]
 watchdog+0xd43/0xfa0 kernel/hung_task.c:294
 kthread+0x3b1/0x4a0 kernel/kthread.c:292
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 8 Comm: kworker/u4:0 Not tainted 5.10.0-rc5-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: krdsd rds_connect_worker
RIP: 0010:__this_cpu_preempt_check+0x0/0x20 lib/smp_processor_id.c:64
Code: 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 c7 c6 c0 9a 9d 89 48 c7 c7 00 9b 9d 89 e9 b8 fe ff ff 0f 1f 84 00 00 00 00 00 <55> 48 89 fd 0f 1f 44 00 00 48 89 ee 5d 48 c7 c7 40 9b 9d 89 e9 97
RSP: 0018:ffffc90000cd7840 EFLAGS: 00000046
RAX: 0000000000000001 RBX: 0000000000000000 RCX: 1ffffffff19d9fa3
RDX: 0000000000000000 RSI: 00000000ffffffff RDI: ffffffff894b5f00
RBP: ffffffff8b337820 R08: 0000000000000000 R09: ffffffff8ceccb4f
R10: fffffbfff19d9969 R11: 0000000000000000 R12: 0000000000000001
R13: ffff8880247132c8 R14: 00000000ffffffff R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff8880b9e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f6af5ef3000 CR3: 000000001366f000 CR4: 00000000001506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 lockdep_recursion_inc kernel/locking/lockdep.c:432 [inline]
 lock_is_held_type+0x34/0x100 kernel/locking/lockdep.c:5475
 lock_is_held include/linux/lockdep.h:271 [inline]
 rcu_read_lock_sched_held+0x3a/0x70 kernel/rcu/update.c:123
 trace_lock_acquire include/trace/events/lock.h:13 [inline]
 lock_acquire+0x5c9/0x740 kernel/locking/lockdep.c:5408
 __raw_read_lock_bh include/linux/rwlock_api_smp.h:176 [inline]
 _raw_read_lock_bh+0x3b/0x70 kernel/locking/spinlock.c:247
 sock_i_uid+0x1b/0xb0 net/core/sock.c:2154
 inet_csk_bind_conflict+0x58/0x510 net/ipv4/inet_connection_sock.c:140
 inet_csk_find_open_port net/ipv4/inet_connection_sock.c:233 [inline]
 inet_csk_get_port+0xac1/0x1690 net/ipv4/inet_connection_sock.c:367
 __inet_bind+0x796/0xbc0 net/ipv4/af_inet.c:528
 inet_bind+0xf0/0x160 net/ipv4/af_inet.c:457
 rds_tcp_conn_path_connect+0x532/0x880 net/rds/tcp_connect.c:144
 rds_connect_worker+0x1a5/0x2c0 net/rds/threads.c:176
 process_one_work+0x933/0x15a0 kernel/workqueue.c:2272
 worker_thread+0x64c/0x1120 kernel/workqueue.c:2418
 kthread+0x3b1/0x4a0 kernel/kthread.c:292
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296