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authorMartin Sebor <msebor@redhat.com>2020-05-04 11:21:50 -0600
committerMartin Sebor <msebor@redhat.com>2020-05-04 11:21:50 -0600
commit06febd8c6705c816b2f32ee7aa1f4c0184b05248 (patch)
tree71586b8485abc1c6b220cb6aba340e76286b3087 /string/bits
parent38c67888183db1b6ac21f2f9681b8a384987dfe8 (diff)
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improve out-of-bounds checking with GCC 10 attribute access [BZ #25219]
Adds the access attribute newly introduced in GCC 10 to the subset of
function declarations that are already covered by _FORTIFY_SOURCE and
that don't have corresponding GCC built-in equivalents.

Reviewed-by: DJ Delorie <dj@redhat.com>
Diffstat (limited to 'string/bits')
-rw-r--r--string/bits/string_fortified.h5
1 files changed, 3 insertions, 2 deletions
diff --git a/string/bits/string_fortified.h b/string/bits/string_fortified.h
index e4d07cb50c..309d0f39b2 100644
--- a/string/bits/string_fortified.h
+++ b/string/bits/string_fortified.h
@@ -75,7 +75,7 @@ __NTH (memset (void *__dest, int __ch, size_t __len))
 # include <bits/strings_fortified.h>
 
 void __explicit_bzero_chk (void *__dest, size_t __len, size_t __destlen)
-  __THROW __nonnull ((1));
+  __THROW __nonnull ((1)) __attr_access ((__write_only__, 1, 2));
 
 __fortify_function void
 __NTH (explicit_bzero (void *__dest, size_t __len))
@@ -108,7 +108,8 @@ __NTH (strncpy (char *__restrict __dest, const char *__restrict __src,
 
 /* XXX We have no corresponding builtin yet.  */
 extern char *__stpncpy_chk (char *__dest, const char *__src, size_t __n,
-			    size_t __destlen) __THROW;
+			    size_t __destlen) __THROW
+  __attr_access ((__write_only__, 1, 3)) __attr_access ((__read_only__, 2));
 extern char *__REDIRECT_NTH (__stpncpy_alias, (char *__dest, const char *__src,
 					       size_t __n), stpncpy);