diff options
| author |   Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> | 2022-08-29 23:58:12 +0900 |
|---|---|---|
| committer |   Luiz Augusto von Dentz <luiz.von.dentz@intel.com> | 2022-09-19 10:33:39 -0700 |
| commit | 3124d320c22f3f4388d9ac5c8f37eaad0cefd6b1 (patch) | |
| tree | c1da5477515f4f17331bd5a8ea10fa15a61358ec /net/bluetooth | |
| parent | Bluetooth: use hdev->workqueue when queuing hdev->{cmd,ncmd}_timer works (diff) | |
| download | linux-dev-3124d320c22f3f4388d9ac5c8f37eaad0cefd6b1.tar.xz linux-dev-3124d320c22f3f4388d9ac5c8f37eaad0cefd6b1.zip | |
Bluetooth: hci_{ldisc,serdev}: check percpu_init_rwsem() failure
syzbot is reporting NULL pointer dereference at hci_uart_tty_close() [1],
for rcu_sync_enter() is called without rcu_sync_init() due to
hci_uart_tty_open() ignoring percpu_init_rwsem() failure.
While we are at it, fix that hci_uart_register_device() ignores
percpu_init_rwsem() failure and hci_uart_unregister_device() does not
call percpu_free_rwsem().
Link: https://syzkaller.appspot.com/bug?extid=576dfca25381fb6fbc5f [1]
Reported-by: syzbot <syzbot+576dfca25381fb6fbc5f@syzkaller.appspotmail.com>
Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Fixes: 67d2f8781b9f00d1 ("Bluetooth: hci_ldisc: Allow sleeping while proto locks are held.")
Fixes: d73e172816652772 ("Bluetooth: hci_serdev: Init hci_uart proto_lock to avoid oops")
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
Diffstat (limited to 'net/bluetooth')
0 files changed, 0 insertions, 0 deletions