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authorSiddhesh Poyarekar <siddhesh@redhat.com>2013-06-14 01:20:06 +0530
committerSiddhesh Poyarekar <siddhesh@redhat.com>2013-06-14 01:20:06 +0530
commit5865a56bf4e31c5a152e46454367a99c5971ac02 (patch)
tree0a0ee5d430ef178bced7a0718e62427cd1da6b1b /nptl/tst-pthread-attr-affinity.c
parentc204ab284bc3ef492f5a5201bd6131032bfd471a (diff)
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Avoid access beyond memory bounds in pthread_attr_getaffinity_np
Resolves BZ #15618. pthread_attr_getaffinity_np may write beyond bounds of the input cpuset buffer if the size of the input buffer is smaller than the buffer present in the input pthread attributes. Fix is to copy to the extent of the minimum of the source and the destination.
Diffstat (limited to 'nptl/tst-pthread-attr-affinity.c')
-rw-r--r--nptl/tst-pthread-attr-affinity.c63
1 files changed, 63 insertions, 0 deletions
diff --git a/nptl/tst-pthread-attr-affinity.c b/nptl/tst-pthread-attr-affinity.c
new file mode 100644
index 0000000000..eab0820f92
--- /dev/null
+++ b/nptl/tst-pthread-attr-affinity.c
@@ -0,0 +1,63 @@
+/* Make sure that pthread_attr_getaffinity_np does not crash when the input
+ cpuset size is smaller than that in the attribute structure.
+
+ Copyright (C) 2013 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, see
+ <http://www.gnu.org/licenses/>. */
+
+#include <pthread.h>
+#include <stdio.h>
+#include <sched.h>
+#include <errno.h>
+#include <sys/param.h>
+
+
+#define RETURN_IF_FAIL(f, ...) \
+ ({ \
+ int ret = f (__VA_ARGS__); \
+ if (ret != 0) \
+ { \
+ printf ("%s:%d: %s returned %d (errno = %d)\n", __FILE__, __LINE__, \
+ #f, ret, errno); \
+ return ret; \
+ } \
+ })
+
+static int
+do_test (void)
+{
+ for (int i = 0; i < 10; i++)
+ {
+ pthread_attr_t attr;
+ cpu_set_t *cpuset = CPU_ALLOC (512);
+ size_t cpusetsize = CPU_ALLOC_SIZE (512);
+ CPU_ZERO_S (cpusetsize, cpuset);
+
+ RETURN_IF_FAIL (pthread_attr_init, &attr);
+ RETURN_IF_FAIL (pthread_attr_setaffinity_np, &attr, cpusetsize, cpuset);
+ CPU_FREE (cpuset);
+
+ cpuset = CPU_ALLOC (1);
+ cpusetsize = CPU_ALLOC_SIZE (1);
+ RETURN_IF_FAIL (pthread_attr_getaffinity_np, &attr, cpusetsize, cpuset);
+ CPU_FREE (cpuset);
+ }
+ return 0;
+}
+
+
+#define TEST_FUNCTION do_test ()
+#include "../test-skeleton.c"