https://sourceware.org/bugzilla/show_bug.cgi?id=29141
--- Comment #6 from Siddhesh Poyarekar <siddhesh at sourceware dot org> ---
(In reply to Petr Ovtchenkov from comment #5)
> Hmm. c8ee1c8 not correspond to diff you show above.
Ah, sorry no, they're two different things that I formatted very badly making
it seem like it's one thing. The commit that introduced the regression:
commit c8ee1c85c07b3c9eaef46355cb1095300855e8fa
Author: Joan Bruguera <joanbrugue...@gmail.com>
Date: Mon Apr 11 19:49:56 2022 +0200
misc: Fix rare fortify crash on wchar funcs. [BZ 29030]
and then the one line fix for it that I'm about to post:
diff --git a/misc/sys/cdefs.h b/misc/sys/cdefs.h
index f1faf8292c..1c2b044a0d 100644
--- a/misc/sys/cdefs.h
+++ b/misc/sys/cdefs.h
@@ -164,7 +164,7 @@
/* Length is known to be safe at compile time if the __L * __S <= __OBJSZ
condition can be folded to a constant and if it is true, or unknown (-1) */
#define __glibc_safe_or_unknown_len(__l, __s, __osz) \
- ((__osz) == (__SIZE_TYPE__) -1 \
+ ((__builtin_constant_p (__osz) && (__osz) == (__SIZE_TYPE__) -1) \
|| (__glibc_unsigned_or_positive (__l) \
&& __builtin_constant_p (__glibc_safe_len_cond ((__SIZE_TYPE__) (__l),
\
(__s), (__osz))) \
--
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