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| author | Peilin Ye <yepeilin.cs@gmail.com> | 2020-07-10 12:09:15 -0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-08-21 09:47:58 +0200 |
| commit | d91299b8382b129156708708d69876e753b9ade6 (patch) | |
| tree | 06630e126d120009e1bf672aa44a829e762d196b | |
| parent | 79c70607e5403d31d267e31a1a34e5334318326d (diff) | |
| download | linux-stable-d91299b8382b129156708708d69876e753b9ade6.tar.gz linux-stable-d91299b8382b129156708708d69876e753b9ade6.tar.bz2 linux-stable-d91299b8382b129156708708d69876e753b9ade6.zip | |
Bluetooth: Fix slab-out-of-bounds read in hci_extended_inquiry_result_evt()
commit 51c19bf3d5cfaa66571e4b88ba2a6f6295311101 upstream.
Check upon `num_rsp` is insufficient. A malformed event packet with a
large `num_rsp` number makes hci_extended_inquiry_result_evt() go out
of bounds. Fix it.
This patch fixes the following syzbot bug:
https://syzkaller.appspot.com/bug?id=4bf11aa05c4ca51ce0df86e500fce486552dc8d2
Reported-by: syzbot+d8489a79b781849b9c46@syzkaller.appspotmail.com
Cc: stable@vger.kernel.org
Signed-off-by: Peilin Ye <yepeilin.cs@gmail.com>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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 | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/net/bluetooth/hci_event.c b/net/bluetooth/hci_event.c index 56e4ae7d7f63..b398272bc729 100644 --- a/net/bluetooth/hci_event.c +++ b/net/bluetooth/hci_event.c @@ -3826,7 +3826,7 @@ static void hci_extended_inquiry_result_evt(struct hci_dev *hdev, BT_DBG("%s num_rsp %d", hdev->name, num_rsp); - if (!num_rsp) + if (!num_rsp || skb->len < num_rsp * sizeof(*info) + 1) return; if (hci_dev_test_flag(hdev, HCI_PERIODIC_INQ)) |