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assert: Remove the use of %n from __assert_fail_base (BZ #32456)

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The require size for mmap can be inferred from __vasprintf return
value.  It also fixes tst-assert-2 when building with --enable-fortify,
where even if the format is not translated, __readonly_area fails
because malloc can not be used.

Checked on aarch64-linux-gnu.

Reviewed-by: Florian Weimer <fweimer@redhat.com>
This commit is contained in:
Adhemerval Zanella
2024-12-30 16:36:18 -03:00
parent 37d0a3e55a
commit 6f0ea84f17
3 changed files with 15 additions and 26 deletions
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2
assert/assert-perr.c
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@ -32,7 +32,7 @@ __assert_perror_fail (int errnum,
char errbuf[1024];
char *e = __strerror_r (errnum, errbuf, sizeof errbuf);
__assert_fail_base (_("%s%s%s:%u: %s%sUnexpected error: %s.\n%n"),
__assert_fail_base (_("%s%s%s:%u: %s%sUnexpected error: %s.\n"),
e, file, line, function);
}
libc_hidden_def (__assert_perror_fail)

27
assert/assert.c
View File

@ -15,24 +15,17 @@
License along with the GNU C Library; if not, see
<https://www.gnu.org/licenses/>. */
#include <assert.h>
#include <atomic.h>
#include <intprops.h>
#include <ldsodefs.h>
#include <libintl.h>
#include <stdio.h>
#include <stdlib.h>
#include <sysdep.h>
#include <unistd.h>
#include <sys/mman.h>
#include <libio/iolibio.h>
#include <setvmaname.h>
#include <sys/uio.h>
#include <intprops.h>
#include <unistd.h>
extern const char *__progname;
#include <wchar.h>
#include <libio/iolibio.h>
#define fflush(s) _IO_fflush (s)
/* This function, when passed a string containing an asserted
@ -56,12 +49,12 @@ __assert_fail_base (const char *fmt, const char *assertion, const char *file,
FATAL_PREPARE;
#endif
int total;
if (__asprintf (&str, fmt,
__progname, __progname[0] ? ": " : "",
file, line,
function ? function : "", function ? ": " : "",
assertion, &total) >= 0)
int total = __asprintf (&str, fmt,
__progname, __progname[0] ? ": " : "",
file, line,
function ? function : "", function ? ": " : "",
assertion);
if (total >= 0)
{
/* Print the message. */
(void) __fxprintf (NULL, "%s", str);
@ -129,6 +122,6 @@ void
__assert_fail (const char *assertion, const char *file, unsigned int line,
const char *function)
{
__assert_fail_base (_("%s%s%s:%u: %s%sAssertion `%s' failed.\n%n"),
__assert_fail_base (_("%s%s%s:%u: %s%sAssertion `%s' failed.\n"),
assertion, file, line, function);
}