X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=blobdiff_plain;ds=sidebyside;f=kernel%2Fsysctl.c;h=0deed82a61568d6660a7f4ee625c490ffecffcc5;hb=7ac3ae32d170cea8cb8e7822acc29ed8f1b1018d;hp=3a1744fed2b68d589da4cbf4e5f088e652066262;hpb=bce943278dc4aa03b0ef9c7cf8b1b7110eda8b91;p=linux-2.6

diff --git a/kernel/sysctl.c b/kernel/sysctl.c
index 3a1744fed2..0deed82a61 100644
--- a/kernel/sysctl.c
+++ b/kernel/sysctl.c
@@ -2620,6 +2620,10 @@ static int deprecated_sysctl_warning(struct __sysctl_args *args)
 	int name[CTL_MAXNAME];
 	int i;
 
+	/* Check args->nlen. */
+	if (args->nlen < 0 || args->nlen > CTL_MAXNAME)
+		return -ENOTDIR;
+
 	/* Read in the sysctl name for better debug message logging */
 	for (i = 0; i < args->nlen; i++)
 		if (get_user(name[i], args->name + i))