From cf48556db905ed50ba2bda178da8a729f5abbcdb Mon Sep 17 00:00:00 2001 From: Axel Lin Date: Sat, 31 Aug 2013 19:42:56 +0800 Subject: [PATCH] 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 Signed-off-by: Mark Brown --- drivers/spi/spi-rspi.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/spi/spi-rspi.c b/drivers/spi/spi-rspi.c index 00c32320dce87..49ae72a93087a 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); -- 2.39.5