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| author | Desmond Cheong Zhi Xi <desmondcheongzx@gmail.com> | 2021-07-28 15:51:04 +0800 |
|---|---|---|
| committer | Marcel Holtmann <marcel@holtmann.org> | 2021-07-29 13:37:29 +0200 |
| commit | 92fe24a7db751b80925214ede43f8d2be792ea7b (patch) | |
| tree | 6fe57117afa4272754715d04a63baf56a06f2202 /drivers/bluetooth/btmrvl_sdio.c | |
| parent | a25fca4d3c18766b6f7a3c95fa8faec23ef464c5 (diff) | |
Bluetooth: skip invalid hci_sync_conn_complete_evt
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>
Diffstat (limited to 'drivers/bluetooth/btmrvl_sdio.c')
0 files changed, 0 insertions, 0 deletions