fix: bound home resolver for real path

fntlnz · gnosek · commit 249b355bae37 · 2019-08-06T16:25:08.000+01:00
Signed-off-by: Lorenzo Fontana &lt;lo@linux.com&gt;
diff --git a/userspace/libsinsp/utils.cpp b/userspace/libsinsp/utils.cpp
@@ -78,7 +78,7 @@ char* realpath_ex(const char *path, char *buff)
 	if(*path=='~' && (home = getenv("HOME")))
 	{
 		char s[PATH_MAX];
-		return realpath(strcat(strncpy(s, home, sizeof(s)), path+1), buff);
+		return realpath(strncat(strncpy(s, home, sizeof(s)), path+1, sizeof(path)+1), buff);
 		}
 	else
 	{

Original file line number	Diff line number	Diff line change
`@@ -78,7 +78,7 @@ char* realpath_ex(const char path, char buff)`
`78`	`78`	`if(*path=='~' && (home = getenv("HOME")))`
`79`	`79`	`{`
`80`	`80`	`char s[PATH_MAX];`
`81`		`- return realpath(strcat(strncpy(s, home, sizeof(s)), path+1), buff);`
	`81`	`+ return realpath(strncat(strncpy(s, home, sizeof(s)), path+1, sizeof(path)+1), buff);`
`82`	`82`	`}`
`83`	`83`	`else`
`84`	`84`	`{`