From: Bartosz Golaszewski bartosz.golaszewski@linaro.org
[ Upstream commit 6b35b173dbc1711f8d272e3f322d2ad697015919 ]
The two debug messages in spidev_open() dereference spidev->spi without taking the lock and without checking if it's not null. This can lead to a crash. Drop the messages as they're not needed - the user-space will get informed about ENOMEM with the syscall return value.
Signed-off-by: Bartosz Golaszewski bartosz.golaszewski@linaro.org Link: https://lore.kernel.org/r/20230106100719.196243-2-brgl@bgdev.pl Signed-off-by: Mark Brown broonie@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/spi/spidev.c | 2 -- 1 file changed, 2 deletions(-)
diff --git a/drivers/spi/spidev.c b/drivers/spi/spidev.c index 6313e7d0cdf8..71c3db60e968 100644 --- a/drivers/spi/spidev.c +++ b/drivers/spi/spidev.c @@ -601,7 +601,6 @@ static int spidev_open(struct inode *inode, struct file *filp) if (!spidev->tx_buffer) { spidev->tx_buffer = kmalloc(bufsiz, GFP_KERNEL); if (!spidev->tx_buffer) { - dev_dbg(&spidev->spi->dev, "open/ENOMEM\n"); status = -ENOMEM; goto err_find_dev; } @@ -610,7 +609,6 @@ static int spidev_open(struct inode *inode, struct file *filp) if (!spidev->rx_buffer) { spidev->rx_buffer = kmalloc(bufsiz, GFP_KERNEL); if (!spidev->rx_buffer) { - dev_dbg(&spidev->spi->dev, "open/ENOMEM\n"); status = -ENOMEM; goto err_alloc_rx_buf; }