fortify-headers/tests/test_strncat_dynamic_write.c, branch 3.0.2Standalone portable header-based implementation of FORTIFY_SOURCE=3
http://git.dustri.org/fortify-headers/atom?h=3.0.22026-04-30T22:44:53ZFix strncat/wcsncat2026-04-30T22:44:53Zjvoisin2026-04-30T22:36:32Zurn:sha1:ddd22b2f533db9c0da0bb262fbafa51f67c8587e
Previously, no checks were done when __n <= __b, but strncat _appends_ after
existing content, making this a overly broad check check. For example, with an
8-byte buffer containing "12345\0", strncat(buf, "ABCD", 4) would have the
check skipped, but the result "12345ABCD\0" is 10 bytes, resulting in an
overflow.
This commit fixes this oversight, and adds a bunch of tests.
Add a testsuite2025-11-11T13:09:16Zjvoisin2025-10-31T14:18:10Zurn:sha1:fe3e4269959ea7534722aa2664a3cac69d9109cf
Co-Authored-By: q66 <q66@chimera-linux.org>