On Wed, Dec 23, 2020 at 01:04:46PM -0500, Peilin Ye wrote:
> commit f7e0e8b2f1b0a09b527885babda3e912ba820798 upstream.
>
> `num_reports` is not being properly checked. A malformed event packet with
> a large `num_reports` number makes hci_le_direct_adv_report_evt() read out
> of bounds. Fix it.
>
> Backporting notes:
> - Rebased on linux-4.14.y, commit 3f2ecb86cb90 ("Linux 4.14.212")
> - Retested by syzbot
>
> Cc: stable@xxxxxxxxxxxxxxx
> Fixes: 2f010b55884e ("Bluetooth: Add support for handling LE Direct Advertising Report events")
> Reported-and-tested-by: syzbot+24ebd650e20bd263ca01@xxxxxxxxxxxxxxxxxxxxxxxxx
> Link: https://syzkaller.appspot.com/bug?extid=24ebd650e20bd263ca01
> Signed-off-by: Peilin Ye <yepeilin.cs@xxxxxxxxx>
> Signed-off-by: Marcel Holtmann <marcel@xxxxxxxxxxxx>
> ---
> net/bluetooth/hci_event.c | 12 +++++-------
> 1 file changed, 5 insertions(+), 7 deletions(-)
Thanks for the backport, now queued up!
greg k-h
