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Check for valid stack frame in longjmp.

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If longjmp restores the stack frame to an address which is beyond
the stack frame at the time of the longjmp call it would install
an uninitialized stack frame.  If compiled with _FORTIFY_SOURCE
defined, longjmp will now bail out in this situation.
This commit is contained in:
Ulrich Drepper
2009-05-15 19:28:04 -07:00
parent f1342e0be8
commit b50f8e42ba
17 changed files with 306 additions and 9 deletions
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include/stdio.h
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@ -90,7 +90,8 @@ extern int __gen_tempname (char *__tmpl, int __flags, int __kind);
extern void __libc_fatal (__const char *__message)
__attribute__ ((__noreturn__));
extern void __libc_message (int do_abort, __const char *__fnt, ...);
extern void __fortify_fail (const char *msg) __attribute__ ((noreturn));
extern void __fortify_fail (const char *msg)
__attribute__ ((__noreturn__)) internal_function;
libc_hidden_proto (__fortify_fail)
/* Acquire ownership of STREAM. */