D8286.id21501.diff
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	Index: contrib/netbsd-tests/lib/libc/stdio/t_printf.c
	===================================================================
	--- contrib/netbsd-tests/lib/libc/stdio/t_printf.c
	+++ contrib/netbsd-tests/lib/libc/stdio/t_printf.c
	@@ -120,12 +120,6 @@
	{
	char s[16], fmt[32];

	-#ifndef __NetBSD__
	- atf_tc_expect_signal(SIGSEGV,
	- "some non-NetBSD platforms including FreeBSD don't validate "
	- "negative size; testcase blows up with SIGSEGV");
	-#endif
	-
	snprintf(fmt, sizeof(fmt), "%%%zu$d", SIZE_MAX / sizeof(size_t));

	ATF_CHECK(snprintf(s, sizeof(s), fmt, -23) == -1);
	Index: lib/libc/stdio/printf-pos.c
	===================================================================
	--- lib/libc/stdio/printf-pos.c
	+++ lib/libc/stdio/printf-pos.c
	@@ -113,6 +113,10 @@
	_ensurespace(struct typetable *types)
	{

	+ /* Validate sign first */
	+ if (types->nextarg < 0)
	+ return (-1);
	+
	if (types->nextarg >= types->tablesize) {
	if (__grow_type_table(types))
	return (-1);