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Diffstat (limited to 'net/bluetooth/hci_event.c')
-rw-r--r--net/bluetooth/hci_event.c21
1 files changed, 21 insertions, 0 deletions
diff --git a/net/bluetooth/hci_event.c b/net/bluetooth/hci_event.c
index 186041866315..8acec932123a 100644
--- a/net/bluetooth/hci_event.c
+++ b/net/bluetooth/hci_event.c
@@ -4719,6 +4719,27 @@ static void process_adv_report(struct hci_dev *hdev, u8 type, bdaddr_t *bdaddr,
struct hci_conn *conn;
bool match;
u32 flags;
+ u8 *ptr, real_len;
+
+ /* Find the end of the data in case the report contains padded zero
+ * bytes at the end causing an invalid length value.
+ *
+ * When data is NULL, len is 0 so there is no need for extra ptr
+ * check as 'ptr < data + 0' is already false in such case.
+ */
+ for (ptr = data; ptr < data + len && *ptr; ptr += *ptr + 1) {
+ if (ptr + 1 + *ptr > data + len)
+ break;
+ }
+
+ real_len = ptr - data;
+
+ /* Adjust for actual length */
+ if (len != real_len) {
+ BT_ERR_RATELIMITED("%s advertising data length corrected",
+ hdev->name);
+ len = real_len;
+ }
/* If the direct address is present, then this report is from
* a LE Direct Advertising Report event. In that case it is