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| author | Myungho Jung <mhjungk@gmail.com> | 2019-02-03 03:56:36 +0300 |
|---|---|---|
| committer | Marcel Holtmann <marcel@holtmann.org> | 2019-02-04 17:43:46 +0300 |
| commit | e20a2e9c42c9e4002d9e338d74e7819e88d77162 (patch) | |
| tree | 6eb84aa6bbd338c29e827c6d6ff0d3f115f4c653 /ipc | |
| parent | 017a01ccfbc5a35aed83acbf2ee2735f8c3efe8a (diff) | |
| download | linux-e20a2e9c42c9e4002d9e338d74e7819e88d77162.tar.xz | |
Bluetooth: Fix decrementing reference count twice in releasing socket
When releasing socket, it is possible to enter hci_sock_release() and
hci_sock_dev_event(HCI_DEV_UNREG) at the same time in different thread.
The reference count of hdev should be decremented only once from one of
them but if storing hdev to local variable in hci_sock_release() before
detached from socket and setting to NULL in hci_sock_dev_event(),
hci_dev_put(hdev) is unexpectedly called twice. This is resolved by
referencing hdev from socket after bt_sock_unlink() in
hci_sock_release().
Reported-by: syzbot+fdc00003f4efff43bc5b@syzkaller.appspotmail.com
Signed-off-by: Myungho Jung <mhjungk@gmail.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Diffstat (limited to 'ipc')
0 files changed, 0 insertions, 0 deletions