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| author | Lukas Wunner <lukas@wunner.de> | 2020-12-07 09:17:01 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-12-30 11:51:41 +0100 |
| commit | 614f2529c8ea96a41c677c576491594ffc620ce6 (patch) | |
| tree | 2695980809535fe2c68e11e9ad08d71f674e3394 /drivers/spi/spi-davinci.c | |
| parent | c6b9bfb0c477ba8710926d792b1bd0f41775b982 (diff) | |
| download | linux-stable-614f2529c8ea96a41c677c576491594ffc620ce6.tar.gz linux-stable-614f2529c8ea96a41c677c576491594ffc620ce6.tar.bz2 linux-stable-614f2529c8ea96a41c677c576491594ffc620ce6.zip | |
spi: davinci: Fix use-after-free on unbind
commit 373afef350a93519b4b8d636b0895da8650b714b upstream.
davinci_spi_remove() accesses the driver's private data after it's been
freed with spi_master_put().
Fix by moving the spi_master_put() to the end of the function.
Fixes: fe5fd2540947 ("spi: davinci: Use dma_request_chan() for requesting DMA channel")
Signed-off-by: Lukas Wunner <lukas@wunner.de>
Acked-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Cc: <stable@vger.kernel.org> # v4.7+
Link: https://lore.kernel.org/r/412f7eb1cf8990e0a3a2153f4c577298deab623e.1607286887.git.lukas@wunner.de
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/spi/spi-davinci.c')
| -rw-r--r-- | drivers/spi/spi-davinci.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/spi/spi-davinci.c b/drivers/spi/spi-davinci.c index f71c497393a6..5260183a58a8 100644 --- a/drivers/spi/spi-davinci.c +++ b/drivers/spi/spi-davinci.c @@ -1040,13 +1040,13 @@ static int davinci_spi_remove(struct platform_device *pdev) spi_bitbang_stop(&dspi->bitbang); clk_disable_unprepare(dspi->clk); - spi_master_put(master); if (dspi->dma_rx) { dma_release_channel(dspi->dma_rx); dma_release_channel(dspi->dma_tx); } + spi_master_put(master); return 0; } |