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-rw-r--r--fs/ecryptfs/keystore.c7
1 files changed, 7 insertions, 0 deletions
diff --git a/fs/ecryptfs/keystore.c b/fs/ecryptfs/keystore.c
index 5414253d4c97..259525c9abb8 100644
--- a/fs/ecryptfs/keystore.c
+++ b/fs/ecryptfs/keystore.c
@@ -1303,6 +1303,13 @@ parse_tag_3_packet(struct ecryptfs_crypt_stat *crypt_stat,
}
(*new_auth_tok)->session_key.encrypted_key_size =
(body_size - (ECRYPTFS_SALT_SIZE + 5));
+ if ((*new_auth_tok)->session_key.encrypted_key_size
+ > ECRYPTFS_MAX_ENCRYPTED_KEY_BYTES) {
+ printk(KERN_WARNING "Tag 3 packet contains key larger "
+ "than ECRYPTFS_MAX_ENCRYPTED_KEY_BYTES\n");
+ rc = -EINVAL;
+ goto out_free;
+ }
if (unlikely(data[(*packet_size)++] != 0x04)) {
printk(KERN_WARNING "Unknown version number [%d]\n",
data[(*packet_size) - 1]);