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@vger.kernel.org Fixes: 2f010b55884e ("Bluetooth: Add support for handling LE Direct Advertising Report events") Reported-and-tested-by: syzbot+24ebd650e20bd263ca01@syzkaller.appspotmail.com Link: https://syzkaller.appspot.com/bug?extid=24ebd650e20bd263ca01 Signed-off-by: Peilin Ye yepeilin.cs@gmail.com Signed-off-by: Marcel Holtmann marcel@holtmann.org
net/bluetooth/hci_event.c | 12 +++++------- 1 file changed, 5 insertions(+), 7 deletions(-)
Thanks for the backport, now queued up!
greg k-h