Red Hat Bugzilla – Bug 447752
[glibc] Frequent segfaults in libresolv-2.8.90.so
Last modified: 2008-05-25 04:29:39 EDT
Description of problem: After upgrading to glibc-2.8.90, network is heavily affected by a dysfunctional DNS service. Host names often fail to get resolved. SSH connections always fail after a short period of time. This even applies to the latest koji build. Version-Release number of selected component (if applicable): glibc-2.8.90-{1,2,3,4} How reproducible: Always. Steps to Reproduce: 1. Open web browser. 2. Open URL. Actual results: Often an error message about an unknown server name appears as if the server was down, or the name didn't get resolved properly. Expected results: URL is loaded properly. Additional info: - Latency is high, and often one has to reload a web page several times to have it eventually be displayed. - Regarding the SSH problems, I have spotted a related error message in /var/log/dmesg: ssh[4230]: segfault at 3 ip f063a9 sp 7fff1d20dc40 error 4 in libresolv-2.8.90.so[efe000+12000]
I have downgraded temporarily to glibc-2.8 and one of the stable F9 kernel. The segfault in libresolv-2.8.90.so disappears by doing so. However, all other symptoms remain. After installing madwifi to override the system default ath5k driver, network connectivity improves a lot which points to a serious regression in the ath5 driver which is responsible for the SSH drop-outs etc. This also explains why even the latest glibc-2.8.90-4 hadn't brought much improvement.
No issue for kernels < 2.6.25.4-26.fc9, thus related to ath5k and unlikely to depend on glibc-2.8.90. *** This bug has been marked as a duplicate of 448180 ***