Deadlock

[xia-chu]

Thank you very much for your work. I am using usrsctp to implement the WebRTC DataChannel functionality.
Currently, I am developing on Ubuntu 20.04 and using your library by installing libusrsctp-dev via apt-get. However, I have encountered a deadlock issue in my program. Below is the thread backtrace information:

• Many threads deadlock here:

Thread 4 (LWP 7531):
#0  0x00007fd474a25170 in __lll_lock_wait () from target:/lib/x86_64-linux-gnu/libpthread.so.0
#1  0x00007fd474a1d0a3 in pthread_mutex_lock () from target:/lib/x86_64-linux-gnu/libpthread.so.0
#2  0x00007fd4749bc5e1 in sctp_inpcb_alloc () from target:/lib/x86_64-linux-gnu/libusrsctp.so.1
#3  0x00007fd4749d2843 in sctpconn_attach () from target:/lib/x86_64-linux-gnu/libusrsctp.so.1
#4  0x00007fd47495b349 in socreate () from target:/lib/x86_64-linux-gnu/libusrsctp.so.1
#5  0x00007fd47495b4e5 in usrsctp_socket () from target:/lib/x86_64-linux-gnu/libusrsctp.so.1

• One thread deadlock here:

Thread 12 (LWP 7539):
#0  0x00007fd474a21376 in pthread_cond_wait@@GLIBC_2.3.2 () from target:/lib/x86_64-linux-gnu/libpthread.so.0
#1  0x00007fd47496ca0d in sctp_os_timer_stop () from target:/lib/x86_64-linux-gnu/libusrsctp.so.1
#2  0x00007fd4749ed8c9 in sctp_timer_stop () from target:/lib/x86_64-linux-gnu/libusrsctp.so.1
#3  0x00007fd4749be95b in sctp_inpcb_free () from target:/lib/x86_64-linux-gnu/libusrsctp.so.1
#4  0x00007fd4749d2a01 in sctp_close () from target:/lib/x86_64-linux-gnu/libusrsctp.so.1
#5  0x00007fd474959184 in sofree () from target:/lib/x86_64-linux-gnu/libusrsctp.so.1
#6  0x00007fd47495c810 in usrsctp_close () from target:/lib/x86_64-linux-gnu/libusrsctp.so.1

• Another thread deadlock here:

Thread 137 (LWP 48072):
#0  0x00007fd474a25170 in __lll_lock_wait () from target:/lib/x86_64-linux-gnu/libpthread.so.0
#1  0x00007fd474a1d0a3 in pthread_mutex_lock () from target:/lib/x86_64-linux-gnu/libpthread.so.0
#2  0x00007fd4749ebea0 in sctp_timeout_handler () from target:/lib/x86_64-linux-gnu/libusrsctp.so.1
#3  0x00007fd47496cbe3 in sctp_handle_tick () from target:/lib/x86_64-linux-gnu/libusrsctp.so.1
#4  0x00007fd47496cd9c in user_sctp_timer_iterate () from target:/lib/x86_64-linux-gnu/libusrsctp.so.1
#5  0x00007fd474a1a609 in start_thread () from target:/lib/x86_64-linux-gnu/libpthread.so.0
#6  0x00007fd4741bd353 in clone () from target:/lib/x86_64-linux-gnu/libc.so.6

Could you please provide some advice and guidance? Thank you. @tuexen