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2004-11-12  Ulrich Drepper  <drepper@redhat.com>

	* sysdeps/unix/sysv/linux/libc_fatal.c: Add new function __libc_message
	which performs the printing and simple format string handling.  The
	string is written to tty, stderr, syslog in this order, stopping after
	the first successful output.
	(__libc_fatal): Call __libc_message.
	* include/stdio.h: Declare __libc_message.
	* malloc/malloc.c (malloc_printerr): Use __libc_message.
	* debug/chk_fail.c: Also print message with __libc_message.
	* debug/test-strcpy_chk.c: Ensure that debug messages are not printed
	to the terminal or stderr.
	* debug/tst-chk1.c: Likewise.

	* posix/Makefile: Remove gpl2lgpl variable.
This commit is contained in:
Ulrich Drepper 2004-11-13 03:13:00 +00:00
parent 1327439fc6
commit a9055cab7a
6 changed files with 78 additions and 64 deletions
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16
ChangeLog
View File

@ -1,3 +1,19 @@
2004-11-12 Ulrich Drepper <drepper@redhat.com>
* sysdeps/unix/sysv/linux/libc_fatal.c: Add new function __libc_message
which performs the printing and simple format string handling. The
string is written to tty, stderr, syslog in this order, stopping after
the first successful output.
(__libc_fatal): Call __libc_message.
* include/stdio.h: Declare __libc_message.
* malloc/malloc.c (malloc_printerr): Use __libc_message.
* debug/chk_fail.c: Also print message with __libc_message.
* debug/test-strcpy_chk.c: Ensure that debug messages are not printed
to the terminal or stderr.
* debug/tst-chk1.c: Likewise.
* posix/Makefile: Remove gpl2lgpl variable.
2004-11-12 Martin Schwidefsky <schwidefsky@de.ibm.com>
* elf/elf.h: Add 20 bit relocations R_390_*20.

14
debug/chk_fail.c
View File

@ -1,3 +1,4 @@
/* Copyright (C) 2004 Free Software Foundation, Inc.
This file is part of the GNU C Library.
@ -16,23 +17,14 @@
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <abort-instr.h>
void
__attribute__ ((noreturn))
__chk_fail (void)
{
while (1)
{
/* This will leave a nice backtrace. */
abort ();
#ifdef ABORT_INSTRUCTION
ABORT_INSTRUCTION;
#endif
_exit (127);
}
__libc_fatal ("*** buffer overflow detected ***\n");
}
libc_hidden_def (__chk_fail)

49
debug/test-strcpy_chk.c
View File

@ -46,6 +46,8 @@ simple_strcpy_chk (char *dst, const char *src, size_t len)
}
#endif
#include <fcntl.h>
#include <paths.h>
#include <setjmp.h>
#include <signal.h>
@ -80,8 +82,8 @@ do_one_test (impl_t *impl, char *dst, const char *src,
if (setjmp (chk_fail_buf) == 0)
{
res = CALL (impl, dst, src, dlen);
error (0, 0, "Function %s (%zd; %zd) did not __chk_fail",
impl->name, len, dlen);
printf ("*** Function %s (%zd; %zd) did not __chk_fail\n",
impl->name, len, dlen);
chk_fail_ok = 0;
ret = 1;
}
@ -92,16 +94,16 @@ do_one_test (impl_t *impl, char *dst, const char *src,
if (res != STRCPY_RESULT (dst, len))
{
error (0, 0, "Wrong result in function %s %p %p", impl->name,
res, STRCPY_RESULT (dst, len));
printf ("Wrong result in function %s %p %p\n", impl->name,
res, STRCPY_RESULT (dst, len));
ret = 1;
return;
}
if (strcmp (dst, src) != 0)
{
error (0, 0, "Wrong result in function %s dst \"%s\" src \"%s\"",
impl->name, dst, src);
printf ("Wrong result in function %s dst \"%s\" src \"%s\"\n",
impl->name, dst, src);
ret = 1;
return;
}
@ -232,7 +234,7 @@ do_random_tests (void)
if (setjmp (chk_fail_buf) == 0)
{
res = CALL (impl, p2 + align2, p1 + align1, dlen);
error (0, 0, "Iteration %zd - did not __chk_fail", n);
printf ("Iteration %zd - did not __chk_fail\n", n);
chk_fail_ok = 0;
ret = 1;
}
@ -243,17 +245,19 @@ do_random_tests (void)
res = CALL (impl, p2 + align2, p1 + align1, dlen);
if (res != STRCPY_RESULT (p2 + align2, len))
{
error (0, 0, "Iteration %zd - wrong result in function %s (%zd, %zd, %zd) %p != %p",
n, impl->name, align1, align2, len, res,
STRCPY_RESULT (p2 + align2, len));
printf ("\
Iteration %zd - wrong result in function %s (%zd, %zd, %zd) %p != %p\n",
n, impl->name, align1, align2, len, res,
STRCPY_RESULT (p2 + align2, len));
ret = 1;
}
for (j = 0; j < align2 + 64; ++j)
{
if (p2[j - 64] != '\1')
{
error (0, 0, "Iteration %zd - garbage before, %s (%zd, %zd, %zd)",
n, impl->name, align1, align2, len);
printf ("\
Iteration %zd - garbage before, %s (%zd, %zd, %zd)\n",
n, impl->name, align1, align2, len);
ret = 1;
break;
}
@ -262,16 +266,18 @@ do_random_tests (void)
{
if (p2[j] != '\1')
{
error (0, 0, "Iteration %zd - garbage after, %s (%zd, %zd, %zd)",
n, impl->name, align1, align2, len);
printf ("\
Iteration %zd - garbage after, %s (%zd, %zd, %zd)\n",
n, impl->name, align1, align2, len);
ret = 1;
break;
}
}
if (memcmp (p1 + align1, p2 + align2, len + 1))
{
error (0, 0, "Iteration %zd - different strings, %s (%zd, %zd, %zd)",
n, impl->name, align1, align2, len);
printf ("\
Iteration %zd - different strings, %s (%zd, %zd, %zd)\n",
n, impl->name, align1, align2, len);
ret = 1;
}
}
@ -290,6 +296,17 @@ test_main (void)
sigaction (SIGABRT, &sa, NULL);
/* Avoid all the buffer overflow messages on stderr. */
int fd = open (_PATH_DEVNULL, O_WRONLY);
if (fd == -1)
close (STDERR_FILENO);
else
{
dup2 (fd, STDERR_FILENO);
close (fd);
}
setenv ("LIBC_FATAL_STDERR_", "1", 1);
test_init ();
printf ("%23s", "");

13
debug/tst-chk1.c
View File

@ -17,6 +17,8 @@
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
#include <fcntl.h>
#include <paths.h>
#include <setjmp.h>
#include <signal.h>
#include <stdio.h>
@ -106,6 +108,17 @@ do_test (void)
sigaction (SIGABRT, &sa, NULL);
/* Avoid all the buffer overflow messages on stderr. */
int fd = open (_PATH_DEVNULL, O_WRONLY);
if (fd == -1)
close (STDERR_FILENO);
else
{
dup2 (fd, STDERR_FILENO);
close (fd);
}
setenv ("LIBC_FATAL_STDERR_", "1", 1);
struct A { char buf1[9]; char buf2[1]; } a;
printf ("Test checking routines at fortify level %d\n",

2
include/stdio.h
View File

@ -62,6 +62,8 @@ extern int __gen_tempname (char *__tmpl, int __kind);
/* Print out MESSAGE on the error output and abort. */
extern void __libc_fatal (__const char *__message)
__attribute__ ((__noreturn__));
extern void __libc_message (int do_abort, __const char *__fnt, ...)
__attribute__ ((__noreturn__));
/* Acquire ownership of STREAM. */
extern void __flockfile (FILE *__stream);

48
malloc/malloc.c
View File

@ -5474,45 +5474,19 @@ malloc_printerr(int action, const char *str, void *ptr)
{
if (action & 1)
{
/* output string will be ": ADDR ***\n" */
static const char suffix[] = " ***\n";
static const char prefix[] = ": 0x";
char buf[sizeof (prefix) - 1 + sizeof (void *) * 2 + sizeof (suffix)];
char *cp;
if (action & 4)
cp = memcpy (&buf[sizeof (buf) - 2], "\n", 2);
else
{
cp = memcpy (&buf[sizeof (buf) - sizeof (suffix)], suffix,
sizeof (suffix));
cp = _itoa_word ((unsigned long int) ptr, cp, 16, 0);
while (cp > &buf[sizeof (prefix) - 1])
*--cp = '0';
cp = memcpy (buf, prefix, sizeof (prefix) - 1);
}
char buf[2 * sizeof (uintptr_t) + 1];
struct iovec iov[3];
int n = 0;
if ((action & 4) == 0)
{
iov[0].iov_base = (char *) "*** glibc detected *** ";
iov[0].iov_len = strlen (iov[0].iov_base);
++n;
}
iov[n].iov_base = (char *) str;
iov[n].iov_len = strlen (str);
++n;
iov[n].iov_base = cp;
iov[n].iov_len = &buf[sizeof (buf) - 1] - cp;
++n;
if (TEMP_FAILURE_RETRY (__writev (STDERR_FILENO, iov, n)) == -1
&& errno == EBADF)
/* Standard error is not opened. Try using syslog. */
syslog (LOG_ERR, "%s%s%s", (char *) iov[0].iov_base,
(char *) iov[1].iov_base,
n == 3 ? (const char *) iov[2].iov_base : "");
buf[sizeof (buf) - 1] = '\0';
char *cp = _itoa_word ((uintptr_t) ptr, &buf[sizeof (buf) - 1], 16, 0);
while (cp > buf)
*--cp = '0';
__libc_message (action & 2,
action & 4
? "%s\n" : "*** glibc detected *** %s: 0x%s ***\n",
str, cp);
}
if (action & 2)
else if (action & 2)
abort ();
}