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| author | Zheng Wang <zyytlz.wz@163.com> | 2023-03-09 16:07:39 +0800 |
|---|---|---|
| committer | Luiz Augusto von Dentz <luiz.von.dentz@intel.com> | 2023-03-23 13:09:38 -0700 |
| commit | 1e9ac114c4428fdb7ff4635b45d4f46017e8916f (patch) | |
| tree | 24786f57e784961107ac608807a0c7ecbb942af4 /drivers/bluetooth | |
| parent | 9aa9d9473f1550d1936c31259720b3f1f4690576 (diff) | |
| download | lwn-1e9ac114c4428fdb7ff4635b45d4f46017e8916f.tar.gz lwn-1e9ac114c4428fdb7ff4635b45d4f46017e8916f.zip | |
Bluetooth: btsdio: fix use after free bug in btsdio_remove due to unfinished work
In btsdio_probe, &data->work was bound with btsdio_work.In
btsdio_send_frame, it was started by schedule_work.
If we call btsdio_remove with an unfinished job, there may
be a race condition and cause UAF bug on hdev.
Fixes: ddbaf13e3609 ("[Bluetooth] Add generic driver for Bluetooth SDIO devices")
Signed-off-by: Zheng Wang <zyytlz.wz@163.com>
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
Diffstat (limited to 'drivers/bluetooth')
| -rw-r--r-- | drivers/bluetooth/btsdio.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/bluetooth/btsdio.c b/drivers/bluetooth/btsdio.c index 795be33f2892..02893600db39 100644 --- a/drivers/bluetooth/btsdio.c +++ b/drivers/bluetooth/btsdio.c @@ -354,6 +354,7 @@ static void btsdio_remove(struct sdio_func *func) BT_DBG("func %p", func); + cancel_work_sync(&data->work); if (!data) return; |