efi/printf: Handle null string input (fb031937) · Commits · 戴 / test

Print "(null)" for 's' if the input is a NULL pointer. Signed-off-by:

drivers/firmware/efi/libstub/vsprintf.c

+5 −0

Original line number	Diff line number	Diff line
		@@ -14,6 +14,7 @@

		#include <linux/compiler.h>
		#include <linux/ctype.h>
		#include <linux/limits.h>
		#include <linux/string.h>

		static int skip_atoi(const char **s)
		@@ -356,7 +357,11 @@ int vsprintf(char buf, const char fmt, va_list ap)
		continue;

		case 's':
		if (precision < 0)
		precision = INT_MAX;
		s = va_arg(args, char *);
		if (!s)
		s = precision < 6 ? "" : "(null)";
		len = strnlen(s, precision);

		if (!(flags & LEFT))