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| author | Desmond Cheong Zhi Xi <desmondcheongzx@gmail.com> | 2021-07-28 15:51:04 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-09-18 13:40:23 +0200 |
| commit | 6528cc687c888d312bc5599bc9cdb603b3e7eb5a (patch) | |
| tree | 16e074fe9ea29e444590dd4d8bbed7db5a06220b /kernel | |
| parent | 3b82e4799f539103579e01c46e082fcfe6400567 (diff) | |
Bluetooth: skip invalid hci_sync_conn_complete_evt
[ Upstream commit 92fe24a7db751b80925214ede43f8d2be792ea7b ]
Syzbot reported a corrupted list in kobject_add_internal [1]. This
happens when multiple HCI_EV_SYNC_CONN_COMPLETE event packets with
status 0 are sent for the same HCI connection. This causes us to
register the device more than once which corrupts the kset list.
As this is forbidden behavior, we add a check for whether we're
trying to process the same HCI_EV_SYNC_CONN_COMPLETE event multiple
times for one connection. If that's the case, the event is invalid, so
we report an error that the device is misbehaving, and ignore the
packet.
Link: https://syzkaller.appspot.com/bug?extid=66264bf2fd0476be7e6c [1]
Reported-by: syzbot+66264bf2fd0476be7e6c@syzkaller.appspotmail.com
Tested-by: syzbot+66264bf2fd0476be7e6c@syzkaller.appspotmail.com
Signed-off-by: Desmond Cheong Zhi Xi <desmondcheongzx@gmail.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'kernel')
0 files changed, 0 insertions, 0 deletions