33 lines
973 B
Diff
33 lines
973 B
Diff
See http://hmarco.org/bugs/CVE-2013-4788.html
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--- csu/libc-start.c 2012-12-25 04:02:13.000000000 +0100
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+++ csu/libc-start.c 2013-07-10 00:13:48.000000000 +0200
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@@ -38,6 +38,12 @@ extern void __pthread_initialize_minimal
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in thread local area. */
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uintptr_t __stack_chk_guard attribute_relro;
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# endif
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+
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+# ifndef THREAD_SET_POINTER_GUARD
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+uintptr_t __pointer_chk_guard_local
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+ attribute_relro attribute_hidden __attribute__ ((nocommon));
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+# endif
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+
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#endif
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#ifdef HAVE_PTR_NTHREADS
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@@ -184,6 +190,14 @@ LIBC_START_MAIN (int (*main) (int, char
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# else
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__stack_chk_guard = stack_chk_guard;
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# endif
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+ uintptr_t pointer_chk_guard = _dl_setup_pointer_guard (_dl_random,
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+ stack_chk_guard);
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+# ifdef THREAD_SET_POINTER_GUARD
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+ THREAD_SET_POINTER_GUARD (pointer_chk_guard);
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+# else
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+ __pointer_chk_guard_local = pointer_chk_guard;
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+# endif
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+
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#endif
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/* Register the destructor of the dynamic linker if there is any. */
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