We need to backport this commit: commit 83a552b0bb9fc2a5e80a0ab3723c0a80ce1db9f2 Author: Wilco Dijkstra <wdijkstr> Date: Wed Sep 19 16:50:18 2018 +0100 Fix strstr bug with huge needles (bug 23637) The generic strstr in GLIBC 2.28 fails to match huge needles. The optimized AVAILABLE macro reads ahead a large fixed amount to reduce the overhead of repeatedly checking for the end of the string. However if the needle length is larger than this, two_way_long_needle may confuse this as meaning the end of the string and return NULL. This is fixed by adding the needle length to the amount to read ahead. [BZ #23637] * string/test-strstr.c (pr23637): New function. (test_main): Add tests with longer needles. * string/strcasestr.c (AVAILABLE): Fix readahead distance. * string/strstr.c (AVAILABLE): Likewise. This change comes with a test case.
glibc-2.28-17.fc29 has been submitted as an update to Fedora 29. https://bodhi.fedoraproject.org/updates/FEDORA-2018-0e5874aba9
glibc-2.28-17.fc29 has been pushed to the Fedora 29 testing repository. If problems still persist, please make note of it in this bug report. See https://fedoraproject.org/wiki/QA:Updates_Testing for instructions on how to install test updates. You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2018-0e5874aba9
glibc-2.28-17.fc29 has been pushed to the Fedora 29 stable repository. If problems still persist, please make note of it in this bug report.