We had a Kamailio 5.5.4 server crash. There were lots of the following errors repeated over and over in the Kamailio log:

Mar 10 14:59:14 px1 /usr/sbin/kamailio[1375]: WARNING: [core/tcp_read.c:1840]: handle_io(): F_TCPCONN connection marked as bad: 0x7f48e97ecdc8 id 0 fd -1 refcnt 0 ([]:0 -> []:0)
Mar 10 14:59:14 px1 /usr/sbin/kamailio[1375]: CRITICAL: [core/io_wait.h:596]: io_watch_del(): invalid fd -1, not in [0, 2)

And in the syslog it said:

Mar 10 14:59:14 px1 kernel: [731786.728781] kamailio[1363]: segfault at 10 ip 00007f48e6dde42d sp 00007ffc2d23ef00 error 4 in tls.so[7f48e6d9c000+47000]
Mar 10 14:59:14 px1 kernel: [731786.728814] Code: 98 01 5c 24 28 41 29 dd 49 01 84 24 40 01 00 00 c7 44 24 6c 00 00 00 00 85 c9 0f 85 be 08 00 00 49 8b 94 24 90 01 00 00 31
f6 <48> 8b 7a 10 31 d2 e8 38 10 fc ff 85 c0 0f 8e 90 0d 00 00 45 31 db

Is anyone able to advise whether this is a known issue, and if it's fixed in a more recent version? The only related bug report I found was issue #748 which was closed without resolution. Our Kamailio is installed from the Ubuntu 22.04 repository.

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