From: Alexey Dobriyan <adobriyan@gmail.com>
Date: Thu, 1 Jul 2021 01:56:01 +0000 (-0700)
Subject: lib: memscan() fixlet
X-Git-Tag: accepted/tizen/unified/20230118.172025~6930^2~25
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=1a58be6277e4324c853babfd35890c2d5e171e8f;p=platform%2Fkernel%2Flinux-rpi.git

lib: memscan() fixlet

Generic version doesn't trucate second argument to char.

Older brother memchr() does as do s390, sparc and i386 assembly versions.

Fortunately, no code passes c >= 256.

Link: https://lkml.kernel.org/r/YLv4cCf0t5UPdyK+@localhost.localdomain
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---

diff --git a/lib/string.c b/lib/string.c
index 7548eb7..77bd0b1 100644
--- a/lib/string.c
+++ b/lib/string.c
@@ -977,7 +977,7 @@ void *memscan(void *addr, int c, size_t size)
 	unsigned char *p = addr;
 
 	while (size) {
-		if (*p == c)
+		if (*p == (unsigned char)c)
 			return (void *)p;
 		p++;
 		size--;