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From: Noah Goldstein <nwg@sourceware.org> To: glibc-cvs@sourceware.org Subject: [glibc] stdlib: Fixup mbstowcs NULL __dst handling. [BZ #29279] Date: Thu, 23 Jun 2022 15:26:56 +0000 (GMT) [thread overview] Message-ID: <20220623152656.89D5238582A3@sourceware.org> (raw) https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=220b83d83d32aa9e6f5659e2fa2a63a0024c3e4a commit 220b83d83d32aa9e6f5659e2fa2a63a0024c3e4a Author: Noah Goldstein <goldstein.w.n@gmail.com> Date: Wed Jun 22 16:34:42 2022 -0700 stdlib: Fixup mbstowcs NULL __dst handling. [BZ #29279] commit 464d189b9622932a75302290625de84931656ec0 (origin/master, origin/HEAD) Author: Noah Goldstein <goldstein.w.n@gmail.com> Date: Wed Jun 22 08:24:21 2022 -0700 stdlib: Remove attr_write from mbstows if dst is NULL [BZ: 29265] Incorrectly called `__mbstowcs_chk` in the NULL __dst case which is incorrect as in the NULL __dst case we are explicitly skipping the objsize checks. As well, remove the `__always_inline` attribute which exists in `__fortify_function`. Reviewed-by: Siddhesh Poyarekar <siddhesh@sourceware.org> Diff: --- stdlib/bits/stdlib.h | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/stdlib/bits/stdlib.h b/stdlib/bits/stdlib.h index d9c2d822a5..de1c3b20f0 100644 --- a/stdlib/bits/stdlib.h +++ b/stdlib/bits/stdlib.h @@ -96,10 +96,10 @@ extern size_t __mbstowcs_chk (wchar_t *__restrict __dst, const char *__restrict __src, size_t __len, size_t __dstlen) __THROW __attr_access ((__write_only__, 1, 3)) __attr_access ((__read_only__, 2)); -extern size_t __REDIRECT_NTH (__mbstowcs_chk_nulldst, +extern size_t __REDIRECT_NTH (__mbstowcs_nulldst, (wchar_t *__restrict __dst, const char *__restrict __src, - size_t __len), mbstowcs_chk) + size_t __len), mbstowcs) __attr_access ((__read_only__, 2)); extern size_t __REDIRECT_NTH (__mbstowcs_alias, (wchar_t *__restrict __dst, @@ -113,12 +113,12 @@ extern size_t __REDIRECT_NTH (__mbstowcs_chk_warn, __warnattr ("mbstowcs called with dst buffer smaller than len " "* sizeof (wchar_t)"); -__always_inline __fortify_function size_t +__fortify_function size_t __NTH (mbstowcs (wchar_t *__restrict __dst, const char *__restrict __src, size_t __len)) { if (__builtin_constant_p (__dst == NULL) && __dst == NULL) - return __mbstowcs_chk_nulldst (__dst, __src, __len); + return __mbstowcs_nulldst (__dst, __src, __len); else return __glibc_fortify_n (mbstowcs, __len, sizeof (wchar_t), __glibc_objsize (__dst), __dst, __src, __len);
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