X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?a=blobdiff_plain;f=extras%2Fata_id%2Fata_id.c;h=9579db310593b5608493efd003808800f7265d8e;hb=1ac216b198e559163b1c81eca2f1c9a635d8e326;hp=2840e914579c4118a0d6941ec91bd1c8522bae9a;hpb=70721db6d7ba0d4f3ac5c17f2cedac056065ad8a;p=elogind.git

diff --git a/extras/ata_id/ata_id.c b/extras/ata_id/ata_id.c
index 2840e9145..9579db310 100644
--- a/extras/ata_id/ata_id.c
+++ b/extras/ata_id/ata_id.c
@@ -68,7 +68,7 @@ static void set_str(char *to, const char *from, size_t count)
 
 	/* strip trailing whitespace */
 	len = strnlen(from, count);
-	while (isspace(from[len-1]))
+	while (len && isspace(from[len-1]))
 		len--;
 
 	/* strip leading whitespace */