From: Zheng Wang zyytlz.wz@163.com
mainline inclusion from mainline-v6.3-rc7 commit 73f7b171b7c09139eb3c6a5677c200dc1be5f318 category: bugfix bugzilla: https://gitee.com/src-openeuler/kernel/issues/I6UW68 CVE: CVE-2023-1989
Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?i...
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In btsdio_probe, the data->work is bound with btsdio_work. It will be started in btsdio_send_frame.
If the btsdio_remove runs with a unfinished work, there may be a race condition that hdev is freed but used in btsdio_work. Fix it by canceling the work before do cleanup in btsdio_remove.
Signed-off-by: Zheng Wang zyytlz.wz@163.com Signed-off-by: Luiz Augusto von Dentz luiz.von.dentz@intel.com Signed-off-by: Liu Jian liujian56@huawei.com Reviewed-by: Yue Haibing yuehaibing@huawei.com Reviewed-by: Wang Weiyang wangweiyang2@huawei.com Signed-off-by: Yongqiang Liu liuyongqiang13@huawei.com --- drivers/bluetooth/btsdio.c | 1 + 1 file changed, 1 insertion(+)
diff --git a/drivers/bluetooth/btsdio.c b/drivers/bluetooth/btsdio.c index 20142bc77554..1325b1df4a8e 100644 --- a/drivers/bluetooth/btsdio.c +++ b/drivers/bluetooth/btsdio.c @@ -356,6 +356,7 @@ static void btsdio_remove(struct sdio_func *func) if (!data) return;
+ cancel_work_sync(&data->work); hdev = data->hdev;
sdio_set_drvdata(func, NULL);