diff options
| author | Axel Lin <axel.lin@ingics.com> | 2013-08-31 19:42:56 +0800 |
|---|---|---|
| committer | Mark Brown <broonie@linaro.org> | 2013-08-31 12:58:53 +0100 |
| commit | 9d3405dbbbd8418a095301d495da65bc3bc5f806 (patch) | |
| tree | 9ff232800a36890202d8f87be7a6cc4b8ddabe55 /drivers/spi/spi-rspi.c | |
| parent | 8d4d08ce8319ae26227c4dd558405963c14c2037 (diff) | |
| download | linux-stable-9d3405dbbbd8418a095301d495da65bc3bc5f806.tar.gz linux-stable-9d3405dbbbd8418a095301d495da65bc3bc5f806.tar.bz2 linux-stable-9d3405dbbbd8418a095301d495da65bc3bc5f806.zip | |
spi: rspi: Add spi_master_get() call to prevent use after free
In rspi_remove(), current code dereferences rspi after spi_unregister_master(),
thus add an extra spi_master_get() call is necessary to prevent use after free.
Current code already has an extra spi_master_put() call in rspi_remove(), so
this patch just adds a spi_master_get() call rather than a spi_master_get() with
spi_master_put() calls.
Signed-off-by: Axel Lin <axel.lin@ingics.com>
Signed-off-by: Mark Brown <broonie@linaro.org>
Diffstat (limited to 'drivers/spi/spi-rspi.c')
| -rw-r--r-- | drivers/spi/spi-rspi.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/spi/spi-rspi.c b/drivers/spi/spi-rspi.c index 00c32320dce8..49ae72a93087 100644 --- a/drivers/spi/spi-rspi.c +++ b/drivers/spi/spi-rspi.c @@ -726,7 +726,7 @@ static void rspi_release_dma(struct rspi_data *rspi) static int rspi_remove(struct platform_device *pdev) { - struct rspi_data *rspi = platform_get_drvdata(pdev); + struct rspi_data *rspi = spi_master_get(platform_get_drvdata(pdev)); spi_unregister_master(rspi->master); rspi_release_dma(rspi); |