[Bug 294881] test failures with FORTIFY_SOURCE=2
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Date: Wed, 10 Jun 2026 04:01:30 UTC
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=294881
--- Comment #7 from commit-hook@FreeBSD.org ---
A commit in branch stable/15 references this bug:
URL:
https://cgit.FreeBSD.org/src/commit/?id=52e2e6bfc31a54e53109978434bc8c43005aa367
commit 52e2e6bfc31a54e53109978434bc8c43005aa367
Author: Kyle Evans <kevans@FreeBSD.org>
AuthorDate: 2026-05-01 02:57:51 +0000
Commit: Kyle Evans <kevans@FreeBSD.org>
CommitDate: 2026-06-10 04:00:35 +0000
ssp: fix our gets_s implementation under _FORTIFY_SOURCE
Annex K specifies an interface for handling constraint violations from
gets_s, but we previously broke this for some classes of get_s misuse.
Provide a more nuanced version that tries to dodge errors that would
trigger a constraint handler while still providing value. Notably, we
don't want to trigger a failure unless the passed-in length reasonably
fits within an RSIZE_MAX, because gets_s will immediately call larger
lengths bogus and fail.
PR: 294881
Reviewed by: markj
(cherry picked from commit d98f4f0698ef0c5178882c544b4c38542d4780f0)
include/ssp/stdio.h | 30 +++++++++++++++++++++++++++++-
1 file changed, 29 insertions(+), 1 deletion(-)
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