diff options
| author | Tetsuo Handa | 2022-08-05 16:12:18 +0900 |
|---|---|---|
| committer | Luiz Augusto von Dentz | 2022-08-08 17:06:23 -0700 |
| commit | 3f2893d3c142986aa935821460cb3adb77044722 (patch) | |
| tree | 20ee507add3fcdf66792108aa676b60cc102a8c1 /net | |
| parent | 9dfe1727b21927c6dd8d703e3a9618b505eb6224 (diff) | |
Bluetooth: don't try to cancel uninitialized works at mgmt_index_removed()
syzbot is reporting attempt to cancel uninitialized work at
mgmt_index_removed() [1], for calling cancel_delayed_work_sync() without
INIT_DELAYED_WORK() is not permitted.
INIT_DELAYED_WORK() is called from mgmt_init_hdev() via chan->hdev_init()
from hci_mgmt_cmd(), but cancel_delayed_work_sync() is unconditionally
called from mgmt_index_removed().
Call cancel_delayed_work_sync() only if HCI_MGMT flag was set, for
mgmt_init_hdev() sets HCI_MGMT flag when calling INIT_DELAYED_WORK().
Link: https://syzkaller.appspot.com/bug?extid=b8ddd338a8838e581b1c [1]
Reported-by: syzbot <syzbot+b8ddd338a8838e581b1c@syzkaller.appspotmail.com>
Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Fixes: 0ef08313cefdd60d ("Bluetooth: Convert delayed discov_off to hci_sync")
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
Diffstat (limited to 'net')
| -rw-r--r-- | net/bluetooth/mgmt.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/net/bluetooth/mgmt.c b/net/bluetooth/mgmt.c index f0bb2fc883d7..6e31023b84f5 100644 --- a/net/bluetooth/mgmt.c +++ b/net/bluetooth/mgmt.c @@ -8935,6 +8935,8 @@ void mgmt_index_removed(struct hci_dev *hdev) HCI_MGMT_EXT_INDEX_EVENTS); /* Cancel any remaining timed work */ + if (!hci_dev_test_flag(hdev, HCI_MGMT)) + return; cancel_delayed_work_sync(&hdev->discov_off); cancel_delayed_work_sync(&hdev->service_cache); cancel_delayed_work_sync(&hdev->rpa_expired); |