This is a note to let you know that I've just added the patch titled crypto: picoxcell - Fix potential race condition bug to the 4.19-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: crypto-picoxcell-fix-potential-race-condition-bug.patch and it can be found in the queue-4.19 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. commit 833227505bf4cd33775f034115c0041f2e9ddf97 Author: Madhuparna Bhowmik <madhuparnabhowmik10@xxxxxxxxx> Date: Tue Aug 11 18:00:24 2020 +0530 crypto: picoxcell - Fix potential race condition bug [ Upstream commit 64f4a62e3b17f1e473f971127c2924cae42afc82 ] engine->stat_irq_thresh was initialized after device_create_file() in the probe function, the initialization may race with call to spacc_stat_irq_thresh_store() which updates engine->stat_irq_thresh, therefore initialize it before creating the file in probe function. Found by Linux Driver Verification project (linuxtesting.org). Fixes: ce92136843cb ("crypto: picoxcell - add support for the...") Signed-off-by: Madhuparna Bhowmik <madhuparnabhowmik10@xxxxxxxxx> Acked-by: Jamie Iles <jamie@xxxxxxxxxxxxx> Signed-off-by: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx> Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> diff --git a/drivers/crypto/picoxcell_crypto.c b/drivers/crypto/picoxcell_crypto.c index e2491754c468f..1ef47f7208b92 100644 --- a/drivers/crypto/picoxcell_crypto.c +++ b/drivers/crypto/picoxcell_crypto.c @@ -1701,11 +1701,6 @@ static int spacc_probe(struct platform_device *pdev) goto err_clk_put; } - ret = device_create_file(&pdev->dev, &dev_attr_stat_irq_thresh); - if (ret) - goto err_clk_disable; - - /* * Use an IRQ threshold of 50% as a default. This seems to be a * reasonable trade off of latency against throughput but can be @@ -1713,6 +1708,10 @@ static int spacc_probe(struct platform_device *pdev) */ engine->stat_irq_thresh = (engine->fifo_sz / 2); + ret = device_create_file(&pdev->dev, &dev_attr_stat_irq_thresh); + if (ret) + goto err_clk_disable; + /* * Configure the interrupts. We only use the STAT_CNT interrupt as we * only submit a new packet for processing when we complete another in