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stdlib: assert on NULL function pointer in atexit etc. [BZ #20544]

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This commit is contained in:
Paul Pluzhnikov
2018-09-01 10:50:41 -07:00
parent 15b8d67e29
commit 8e67b39eb4
5 changed files with 133 additions and 1 deletions
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5
stdlib/on_exit.c
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@ -15,6 +15,7 @@
License along with the GNU C Library; if not, see
<http://www.gnu.org/licenses/>. */
#include <assert.h>
#include <stdlib.h>
#include "exit.h"
#include <sysdep.h>
@ -25,6 +26,10 @@ __on_exit (void (*func) (int status, void *arg), void *arg)
{
struct exit_function *new;
/* As a QoI issue we detect NULL early with an assertion instead
of a SIGSEGV at program exit when the handler is run (bug 20544). */
assert (func != NULL);
__libc_lock_lock (__exit_funcs_lock);
new = __new_exitfn (&__exit_funcs);