You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
85 lines
2.9 KiB
85 lines
2.9 KiB
commit a88f07f71f051021339682328103a8c75559fc5f |
|
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] |
|
|
|
mbstows is defined if dst is NULL and is defined to special cased if |
|
dst is NULL so the fortify objsize check if incorrect in that case. |
|
|
|
Tested on x86-64 linux. |
|
Reviewed-by: Siddhesh Poyarekar <siddhesh@sourceware.org> |
|
|
|
(cherry picked from commit 464d189b9622932a75302290625de84931656ec0) |
|
|
|
diff --git a/stdlib/Makefile b/stdlib/Makefile |
|
index a4ac30d1f6359561..e13f1ee33c410ae6 100644 |
|
--- a/stdlib/Makefile |
|
+++ b/stdlib/Makefile |
|
@@ -217,6 +217,9 @@ CFLAGS-tst-qsort.c += $(stack-align-test-flags) |
|
CFLAGS-tst-makecontext.c += -funwind-tables |
|
CFLAGS-tst-makecontext2.c += $(stack-align-test-flags) |
|
|
|
+CFLAGS-testmb.c += -D_FORTIFY_SOURCE=2 -Wall -Werror |
|
+ |
|
+ |
|
# Run a test on the header files we use. |
|
tests-special += $(objpfx)isomac.out |
|
|
|
diff --git a/stdlib/bits/stdlib.h b/stdlib/bits/stdlib.h |
|
index ccacbdf76a08225a..f0918d5d798a6ac4 100644 |
|
--- a/stdlib/bits/stdlib.h |
|
+++ b/stdlib/bits/stdlib.h |
|
@@ -96,6 +96,11 @@ 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, |
|
+ (wchar_t *__restrict __dst, |
|
+ const char *__restrict __src, |
|
+ size_t __len), mbstowcs_chk) |
|
+ __attr_access ((__read_only__, 2)); |
|
extern size_t __REDIRECT_NTH (__mbstowcs_alias, |
|
(wchar_t *__restrict __dst, |
|
const char *__restrict __src, |
|
@@ -108,16 +113,17 @@ extern size_t __REDIRECT_NTH (__mbstowcs_chk_warn, |
|
__warnattr ("mbstowcs called with dst buffer smaller than len " |
|
"* sizeof (wchar_t)"); |
|
|
|
-__fortify_function size_t |
|
+__always_inline __fortify_function size_t |
|
__NTH (mbstowcs (wchar_t *__restrict __dst, const char *__restrict __src, |
|
size_t __len)) |
|
{ |
|
- return __glibc_fortify_n (mbstowcs, __len, sizeof (wchar_t), |
|
- __glibc_objsize (__dst), |
|
- __dst, __src, __len); |
|
+ if (__builtin_constant_p (__dst == NULL) && __dst == NULL) |
|
+ return __mbstowcs_chk_nulldst (__dst, __src, __len); |
|
+ else |
|
+ return __glibc_fortify_n (mbstowcs, __len, sizeof (wchar_t), |
|
+ __glibc_objsize (__dst), __dst, __src, __len); |
|
} |
|
|
|
- |
|
extern size_t __wcstombs_chk (char *__restrict __dst, |
|
const wchar_t *__restrict __src, |
|
size_t __len, size_t __dstlen) __THROW |
|
diff --git a/stdlib/testmb.c b/stdlib/testmb.c |
|
index 45dae7db61fb3e7b..6ac4dfd21d2d33b8 100644 |
|
--- a/stdlib/testmb.c |
|
+++ b/stdlib/testmb.c |
|
@@ -16,6 +16,13 @@ main (int argc, char *argv[]) |
|
lose = 1; |
|
} |
|
|
|
+ i = mbstowcs (NULL, "bar", 4); |
|
+ if (!(i == 3 && w[1] == 'a')) |
|
+ { |
|
+ puts ("mbstowcs FAILED2!"); |
|
+ lose = 1; |
|
+ } |
|
+ |
|
mbstowcs (w, "blah", 5); |
|
i = wcstombs (c, w, 10); |
|
if (i != 4)
|
|
|