X-Git-Url: http://drtracing.org/?a=blobdiff_plain;f=mm%2Fbacking-dev.c;h=ce682f7a4f29d161189f47fd7e376d69bea2359d;hb=284d20552461466b04d6bfeafeb1c47a8891b591;hp=37d9edcd14cfbbff06510be795b4a6e125b95336;hpb=442e0973e9273ae8832abd70f52efde8b8326178;p=deliverable%2Flinux.git

diff --git a/mm/backing-dev.c b/mm/backing-dev.c
index 37d9edcd14cf..ce682f7a4f29 100644
--- a/mm/backing-dev.c
+++ b/mm/backing-dev.c
@@ -652,7 +652,7 @@ int pdflush_proc_obsolete(struct ctl_table *table, int write,
 {
 	char kbuf[] = "0\n";
 
-	if (*ppos) {
+	if (*ppos || *lenp < sizeof(kbuf)) {
 		*lenp = 0;
 		return 0;
 	}