Program received signal SIGSEGV, Segmentation fault.

[izemize]

Janus randomly stoped after joining text room.

[Switching to Thread 0x7fffc67fc700 (LWP 6753)]
__memcpy_sse2_unaligned () at ../sysdeps/x86_64/multiarch/memcpy-sse2-unaligned.S:116
116 ../sysdeps/x86_64/multiarch/memcpy-sse2-unaligned.S: Nincs ilyen fájl vagy könyvtár.
(no such file or directory)

[izemize]

#0  __memcpy_sse2_unaligned () at ../sysdeps/x86_64/multiarch/memcpy-sse2-unaligned.S:152
#1  0x00007fc94cc3b249 in ?? () from /usr/lib/x86_64-linux-gnu/libcrypto.so.1.0.0
#2  0x00007fc94cc3a1ec in BIO_write () from /usr/lib/x86_64-linux-gnu/libcrypto.so.1.0.0
#3  0x000000000042133e in janus_dtls_bio_filter_write (bio=0x7fc8f8016650,
    in=0x7fc8d80118ba "\370\060@\320*\202\324\260\307\373\235ܺ)]\340\306\001[V>c\271T@P\230\023\223\207F\006v0#\371-/\213]k\370c4\fd8\216\277\030AA\343\346\355U\262\236wb\tsc\030\322CI\347\350\020]\356c5o\320o\027xt\037\361\003|6ì\205\250\033\354\352\\^\332\342\321\365d\324\370\361\215\067}rC\341\034\340\311\070\224\366UM\271\346/t\371\260\355\204\b\303.\363Kw\006%\025ϦѸ\224\212Oĝ\262Ҥ\003\246}\263\306r^\270\345\206J\357$\353L\265\220\207U\036<\250\064\177\212\234\347i_S\354\002\240\340\262 d\224z\261\246b\337\027\021gp\035\062\220\316\020\316\003>"..., inl=-93) at dtls-bio.c:133
#4  0x00007fc94cc3a1ec in BIO_write () from /usr/lib/x86_64-linux-gnu/libcrypto.so.1.0.0
#5  0x00007fc94cf64f12 in ?? () from /usr/lib/x86_64-linux-gnu/libssl.so.1.0.0
#6  0x00007fc94cf76e04 in ?? () from /usr/lib/x86_64-linux-gnu/libssl.so.1.0.0
#7  0x00007fc94cf76b12 in ?? () from /usr/lib/x86_64-linux-gnu/libssl.so.1.0.0
#8  0x00000000004208a4 in janus_dtls_send_sctp_data (dtls=0x7fc8f8014db0, buf=<optimized out>, len=<optimized out>) at dtls.c:894
#9  0x0000000000450f23 in janus_sctp_thread (data=0x7fc8f8021260) at sctp.c:1278
#10 0x00007fc94d421845 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#11 0x00007fc94bce2064 in start_thread (arg=0x7fc910ff9700) at pthread_create.c:309
#12 0x00007fc94ba1762d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

[lminiero]

Sorry, but this trace doesn't help, as it doesn't contain any useful info (everything seems to be optimized). Either build Janus without optimizations, or try with AddressSanitizer itself, which may help in case it's a race condition of some sort: https://janus.conf.meetecho.com/docs/debug

[atoppi]

As @lminiero said, I suggest to run Janus with libasan to gather more info.

[atoppi]

You could also try with a newer version of OpenSSL or just switch to a recent OpenSSL if you are using LibreSSL.

[izemize]

I try AddressSanitizer next time. I use jessie, and there are no newer version of OpenSSL

[izemize]

AddressSanitizer crash output

[atoppi]

Stll can't fully understand what's happening here, because the asan output does not contain useful info.
I want to try relaxing the minimum OpenSSL version to use BIO_write OpenSSL API. That is an API introduced back in 0.9.6 version, and should grant a clean BIO traversal, in place of simple pointer access.

Attached here the patch. Give it a run please.

[izemize]

Thanks for your help. I'm not sure you can changed only version number in this patch?

[atoppi]

Yes, changed the minimum version in order to use OpenSSL API.

[izemize]

Thanks for your job, but patch nothing help for me.

crash

[atoppi]

Can you test your Janus installation with other plugins? E.g. use the html demo pages with echotest and videoroom.

[lminiero]

Any update? Still an issue?

[lminiero]

Closing as we didn't get any update. Please let us know if it's still an issue.