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BZ #15754: CVE-2013-4788

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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.
This commit is contained in:
Carlos O'Donell
2013-09-23 00:52:09 -04:00
parent 58a96064d1
commit c61b4d41c9
19 changed files with 351 additions and 5 deletions
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3
sysdeps/sparc/sparc32/stackguard-macros.h
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@ -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; })