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| author | Peilin Ye <yepeilin.cs@gmail.com> | 2020-07-11 00:45:26 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-08-11 16:33:34 +0300 |
| commit | b78763e0a247f501ec809c30864f60f04c8c921f (patch) | |
| tree | d44fd039d2f750436bfa2cd7c6557e1b9042d2cc | |
| parent | 70d1e884edc4c049e6fc0b6915d8a167b8988e59 (diff) | |
| download | linux-b78763e0a247f501ec809c30864f60f04c8c921f.tar.xz | |
Bluetooth: Prevent out-of-bounds read in hci_inquiry_result_with_rssi_evt()
commit 629b49c848ee71244203934347bd7730b0ddee8d upstream.
Check `num_rsp` before using it as for-loop counter. Add `unlock` label.
Cc: stable@vger.kernel.org
Signed-off-by: Peilin Ye <yepeilin.cs@gmail.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | net/bluetooth/hci_event.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/net/bluetooth/hci_event.c b/net/bluetooth/hci_event.c index 33c3c5b0fef0..7bf6860fed78 100644 --- a/net/bluetooth/hci_event.c +++ b/net/bluetooth/hci_event.c @@ -4067,6 +4067,9 @@ static void hci_inquiry_result_with_rssi_evt(struct hci_dev *hdev, struct inquiry_info_with_rssi_and_pscan_mode *info; info = (void *) (skb->data + 1); + if (skb->len < num_rsp * sizeof(*info) + 1) + goto unlock; + for (; num_rsp; num_rsp--, info++) { u32 flags; @@ -4088,6 +4091,9 @@ static void hci_inquiry_result_with_rssi_evt(struct hci_dev *hdev, } else { struct inquiry_info_with_rssi *info = (void *) (skb->data + 1); + if (skb->len < num_rsp * sizeof(*info) + 1) + goto unlock; + for (; num_rsp; num_rsp--, info++) { u32 flags; @@ -4108,6 +4114,7 @@ static void hci_inquiry_result_with_rssi_evt(struct hci_dev *hdev, } } +unlock: hci_dev_unlock(hdev); } |