Solved [RT-AC68U/386.4] curl segmentation fault when using -u


Occasional Visitor
Is anyone else running into an issue when using the stock curl with -u and getting a "Segmentation fault"? I'm using it for dynamic dns:
curl -k -u "user:password" ""
Doesn't matter whether you use the correct credentials or not.
I'm running on a RT-AC68U, firmware: 386.4, build: Sat Jan 1 18:42:21 UTC 2022 [email protected]
stock curl -V:
curl 7.79.1 (arm-unknown-linux-gnu) libcurl/7.79.1 OpenSSL/1.1.1m
Release-Date: 2021-09-22
Protocols: file ftp ftps http https imap imaps mqtt pop3 pop3s smb smbs smtp smtps
Features: alt-svc HSTS IPv6 Largefile NTLM SSL TLS-SRP UnixSockets
After I install curl from opkg it works. curl -V from opkg:
curl 7.80.0 (arm-openwrt-linux-gnu) libcurl/7.80.0 OpenSSL/1.1.1l zlib/1.2.11
Release-Date: 2021-11-10
Protocols: file ftp ftps http https imap imaps mqtt pop3 pop3s rtsp smtp smtps tftp
Features: alt-svc HSTS HTTPS-proxy IPv6 Largefile libz SSL
Last edited:


Occasional Visitor
I marked it solved because it has to do with my configuration somehow, most likely because of something else I installed via opkg. On a stock RT-AC68U/386.4 I have no issues with the same command.


Occasional Visitor
Final update for whoever finds this thread in the future: NTP had died and that caused a whole slew of issues, including SSL not working. The log was showing that NTP was tainted. Not sure what got corrupted but I was forced to do a complete reset and reconfigure my router but things are fine now.

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