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Commit c26eaaf5 authored by Peilin Ye's avatar Peilin Ye Committed by Greg Kroah-Hartman
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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: default avatar <syzbot+d8489a79b781849b9c46@syzkaller.appspotmail.com>
Cc: stable@vger.kernel.org
Signed-off-by: default avatarPeilin Ye <yepeilin.cs@gmail.com>
Acked-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: default avatarMarcel Holtmann <marcel@holtmann.org>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent a8b8b535

net/bluetooth/hci_event.c

+1 −1
Original line number Diff line number Diff line
@@ -4270,7 +4270,7 @@ 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))