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authorCarlos O'Donell <carlos@redhat.com>2013-09-23 00:52:09 -0400
committerCarlos O'Donell <carlos@redhat.com>2013-09-23 00:52:09 -0400
commitc61b4d41c9647a54a329aa021341c0eb032b793e (patch)
treec4a665c232a7d37786a6f3b5e3f56d0ae11480e8 /sysdeps/sparc/sparc32
parent58a96064d193317236b740998e134b652d3d62ad (diff)
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BZ #15754: CVE-2013-4788
The pointer guard used for pointer mangling was not initialized for
static applications resulting in the security feature being disabled.
The pointer guard is now correctly initialized to a random value for
static applications. Existing static applications need to be
recompiled to take advantage of the fix.

The test tst-ptrguard1-static and tst-ptrguard1 add regression
coverage to ensure the pointer guards are sufficiently random
and initialized to a default value.
Diffstat (limited to 'sysdeps/sparc/sparc32')
-rw-r--r--sysdeps/sparc/sparc32/stackguard-macros.h3
1 files changed, 3 insertions, 0 deletions
diff --git a/sysdeps/sparc/sparc32/stackguard-macros.h b/sysdeps/sparc/sparc32/stackguard-macros.h
index c0b02b0bbd..1eef0f19f0 100644
--- a/sysdeps/sparc/sparc32/stackguard-macros.h
+++ b/sysdeps/sparc/sparc32/stackguard-macros.h
@@ -2,3 +2,6 @@
 
 #define STACK_CHK_GUARD \
   ({ uintptr_t x; asm ("ld [%%g7+0x14], %0" : "=r" (x)); x; })
+
+#define POINTER_CHK_GUARD \
+  ({ uintptr_t x; asm ("ld [%%g7+0x18], %0" : "=r" (x)); x; })