From d379b80540051ac4f0abda3f3635bac888fe96c8 Mon Sep 17 00:00:00 2001 From: NRK Date: Fri, 18 Mar 2022 16:20:54 +0600 Subject: [PATCH] avoid potential UB when using isprint() all the ctype.h functions' argument must be representable as an unsigned char or as EOF, otherwise the behavior is undefined. --- st.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/st.c b/st.c index 6bd0ba3..839482c 100644 --- a/st.c +++ b/st.c @@ -374,7 +374,7 @@ static const char base64_digits[] = { char base64dec_getc(const char **src) { - while (**src && !isprint(**src)) + while (**src && !isprint((unsigned char)**src)) (*src)++; return **src ? *((*src)++) : '='; /* emulate padding if string ends */ } -- 2.43.0