Ubuntu
glibc package

patch Xenial glibc for bug 20116

Asked by Julian Wu on 2019-11-14

Recently a high frequency segfault on a heavy loading multi-threaded daemon running on 16.04 server is observed. After investigation I believe this is the known glibc bug (https://sourceware.org/bugzilla/show_bug.cgi?id=20116) since I can workaround for some cases by rewriting the code but still see the segfault in a thread which must call pthread_create() frequently for the burst incoming requests. Another similar bug report can be found here: https://bbs.archlinux.org/viewtopic.php?id=219773

I further checked the glibc package history (https://launchpad.net/ubuntu/+source/glibc/2.23-0ubuntu11) but it seems that this glibc bug 20116 was not included, maybe because this fix is released officially in glibc 2.25 but xenial is sticky with glibc 2.23.

Is it possible to release a glibc package update to fix this glibc bug? Upgrade to 18.04 is possible but it will take much longer time to verify the system integration.

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Ubuntu glibc Edit question
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Last query:
2019-11-14
Last reply:
2019-11-14
Manfred Hampl (m-hampl) said : #1

I suggest that you create a bug report, quoting the information above.

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