[PATCH] Fix a buffer overflow in qword_add()

[trondmy@xxxxxxxxxx]

From: Trond Myklebust <trond.myklebust@xxxxxxxxxxxxxxx>

Don't allow writing beyond the end of the buffer.

Signed-off-by: Trond Myklebust <trond.myklebust@xxxxxxxxxxxxxxx>
---
 support/nfs/cacheio.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/support/nfs/cacheio.c b/support/nfs/cacheio.c
index 126c12831668..70ead94d64f0 100644
--- a/support/nfs/cacheio.c
+++ b/support/nfs/cacheio.c
@@ -42,7 +42,7 @@ void qword_add(char **bpp, int *lp, char *str)
 
 	if (len < 0) return;
 
-	while ((c=*str++) && len)
+	while ((c=*str++) && len > 0)
 		switch(c) {
 		case ' ':
 		case '\t':
-- 
2.25.2