diff options
| author | Bartosz Golaszewski <bartosz.golaszewski@linaro.org> | 2023-01-06 13:07:19 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2023-02-01 10:34:32 +0300 |
| commit | 75d8a514ceecf0f9dd4caefc7dc0ff98ce2f80cb (patch) | |
| tree | 38eeb01ef4b387baabf46ddc0638689c5e32f6cc | |
| parent | 893d45394dbe4b5cbf3723c19e2ccc8b93a6ac9b (diff) | |
| download | linux-75d8a514ceecf0f9dd4caefc7dc0ff98ce2f80cb.tar.xz | |
spi: spidev: remove debug messages that access spidev->spi without locking
[ 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>
| -rw-r--r-- | drivers/spi/spidev.c | 2 |
1 files changed, 0 insertions, 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; } |