[PATCH v2 3/3] lib: parse_area_spec: no extra symbols after area spec are allowed except for spaces

[Peter Mamonov]

Signed-off-by: Peter Mamonov <pmamonov at gmail.com>
---
 lib/misc.c | 15 ++++++++++-----
 1 file changed, 10 insertions(+), 5 deletions(-)

diff --git a/lib/misc.c b/lib/misc.c
index fc2c45aa4..4b62f8771 100644
--- a/lib/misc.c
+++ b/lib/misc.c
@@ -79,7 +79,7 @@ EXPORT_SYMBOL(strtoul_suffix);
 int parse_area_spec(const char *str, loff_t *start, loff_t *size)
 {
 	char *endp;
-	loff_t end, _start;
+	loff_t end, _start, _size;
 
 	if (!isdigit(*str))
 		return -1;
@@ -90,7 +90,7 @@ int parse_area_spec(const char *str, loff_t *start, loff_t *size)
 
 	if (!*str) {
 		/* beginning given, but no size, assume maximum size */
-		*size = ~0;
+		_size = ~0;
 		goto success;
 	}
 
@@ -99,12 +99,13 @@ int parse_area_spec(const char *str, loff_t *start, loff_t *size)
 		if (!isdigit(*(str + 1)))
 			return -1;
 
-		end = strtoull_suffix(str + 1, NULL, 0);
+		end = strtoull_suffix(str + 1, &endp, 0);
+		str = endp;
 		if (end < *start) {
 			printf("end < start\n");
 			return -1;
 		}
-		*size = end - *start + 1;
+		_size = end - *start + 1;
 		goto success;
 	}
 
@@ -113,14 +114,18 @@ int parse_area_spec(const char *str, loff_t *start, loff_t *size)
 		if (!isdigit(*(str + 1)))
 			return -1;
 
-		*size = strtoull_suffix(str + 1, NULL, 0);
+		_size = strtoull_suffix(str + 1, &endp, 0);
+		str = endp;
 		goto success;
 	}
 
 	return -1;
 
 success:
+	if (*str && !isspace(*str))
+		return -1;
 	*start = _start;
+	*size = _size;
 	return 0;
 }
 EXPORT_SYMBOL(parse_area_spec);
-- 
2.11.0