INFO: task syz.0.8:5921 blocked for more than 143 seconds.
      Not tainted 6.16.0-rc5-syzkaller-00159-g47c84997c686-dirty #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.0.8         state:D
 stack:25688 pid:5921  tgid:5920  ppid:5826   task_flags:0x400040 flags:0x00004006
Call Trace:
 <TASK>
 __schedule+0x16f5/0x4d00
 schedule+0x165/0x360
 __lock_sock+0x14e/0x2b0
 lock_sock_nested+0x9f/0x100
 sk_stream_wait_memory+0x8d1/0xf70
 mptcp_sendmsg+0x1061/0x1970
 __sock_sendmsg+0x19c/0x270
 sock_write_iter+0x258/0x330
 do_iter_readv_writev+0x56e/0x7f0
 vfs_writev+0x31a/0x960
 do_writev+0x14d/0x2d0
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fa78c58e929
RSP: 002b:00007fa78d32c038 EFLAGS: 00000246 ORIG_RAX: 0000000000000014
RAX: ffffffffffffffda RBX: 00007fa78c7b5fa0 RCX: 00007fa78c58e929
RDX: 0000000000000001 RSI: 0000200000000200 RDI: 0000000000000003
RBP: 00007fa78c610b39 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fa78c7b5fa0 R15: 00007ffdd062d6b8
 </TASK>

Showing all locks held in the system:
3 locks held by kworker/0:0/9:
3 locks held by kworker/u8:1/13:
 #0: ffff888109cf0948 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_scheduled_works+0x9b4/0x17b0
 #1: ffffc90000107bc0 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x9ef/0x17b0
 #2: ffffffff8f51d808 (rtnl_mutex){+.+.}-{4:4}, at: addrconf_dad_work+0x112/0x14b0
1 lock held by khungtaskd/34:
 #0: ffffffff8e13f160 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180
7 locks held by kworker/u10:1/36:
2 locks held by kcompactd0/38:
3 locks held by kworker/1:2/792:
2 locks held by kworker/u9:5/3638:
 #0: ffff88801a489148 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_scheduled_works+0x9b4/0x17b0
 #1: ffffc900219a7bc0 ((work_completion)(&sub_info->work)){+.+.}-{0:0}, at: process_scheduled_works+0x9ef/0x17b0
1 lock held by klogd/5267:
2 locks held by udevd/5278:
2 locks held by dhcpcd/5574:
4 locks held by kworker/1:3/5589:
2 locks held by getty/5655:
 #0: ffff888025e620a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70
 #1: ffffc900029062f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x43e/0x1400
2 locks held by syz-executor/5772:
1 lock held by syz-executor/5830:
 #0: ffffffff8e144c78 (rcu_state.exp_mutex){+.+.}-{4:4}, at: synchronize_rcu_expedited+0x2f6/0x730
5 locks held by kworker/0:3/5872:
1 lock held by syz.0.8/5921:
 #0: ffff888037810258 (sk_lock-AF_INET){+.+.}-{0:0}, at: sk_stream_wait_memory+0x8d1/0xf70
2 locks held by kworker/0:4/5960:
2 locks held by modprobe/5962:
2 locks held by syz-executor/5966:
2 locks held by kworker/0:6/5969:
2 locks held by syz-executor/5972:
