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-rw-r--r--security/smack/smackfs.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/security/smack/smackfs.c b/security/smack/smackfs.c
index 840a192e9337..2bae1fc493d1 100644
--- a/security/smack/smackfs.c
+++ b/security/smack/smackfs.c
@@ -905,6 +905,10 @@ static ssize_t smk_set_cipso(struct file *file, const char __user *buf,
for (i = 0; i < catlen; i++) {
rule += SMK_DIGITLEN;
+ if (rule > data + count) {
+ rc = -EOVERFLOW;
+ goto out;
+ }
ret = sscanf(rule, "%u", &cat);
if (ret != 1 || cat > SMACK_CIPSO_MAXCATNUM)
goto out;