tools/nolibc: fix verrx() and errx() message formatting

verrx() passes its va_list to warnx() instead of vwarnx(). warnx() is
variadic, so it takes the va_list as its first and only argument, and
the conversions in the format string print the va_list itself and then
whatever is left in the following argument slots. On x86_64, for
instance,

	errx(1, "int args: %d %d %d", 1, 2, 3);

prints something like "int args: -1699009032 1 2", where the first
number comes from the address of the va_list and changes from run to
run, and

	errx(1, "%d %s", 1234, "foo");

crashes with SIGSEGV, as "%s" takes a leftover argument slot for the
string. errx() goes through verrx(), so every message with arguments
printed by either of them is wrong.

Call vwarnx() from verrx(), as verr() calls vwarn().

Fixes: 9da0f529c089 ("tools/nolibc: add err.h")
Assisted-by: LLM
Signed-off-by: Danish Khateeb <danishkhateeb03@gmail.com>
Link: https://patch.msgid.link/20260924120958.23698-2-danishkhateeb03@gmail.com
Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>

0 files changed, 0 insertions, 0 deletions