Print "(null)" for 's' if the input is a NULL pointer. Signed-off-by: Arvind Sankar <nivedita@xxxxxxxxxxxx> --- drivers/firmware/efi/libstub/vsprintf.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/drivers/firmware/efi/libstub/vsprintf.c b/drivers/firmware/efi/libstub/vsprintf.c index dee9bd068cb6..048276d9c376 100644 --- a/drivers/firmware/efi/libstub/vsprintf.c +++ b/drivers/firmware/efi/libstub/vsprintf.c @@ -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) @@ -355,7 +356,11 @@ 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)) -- 2.26.2
