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| author | Yu Kuai <yukuai3@huawei.com> | 2020-08-17 14:57:26 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-09-09 20:04:24 +0300 |
| commit | cd8c3a766bf286a5e9f4a72ec69e611ae2c88ea6 (patch) | |
| tree | bfa0bdd0721ca503a2c942ea564973564a7388a8 /drivers/dma | |
| parent | 3eabc73c4a3ce80559886c9386f132399f0ad8fe (diff) | |
| download | linux-cd8c3a766bf286a5e9f4a72ec69e611ae2c88ea6.tar.xz | |
dmaengine: at_hdmac: check return value of of_find_device_by_node() in at_dma_xlate()
[ Upstream commit 0cef8e2c5a07d482ec907249dbd6687e8697677f ]
The reurn value of of_find_device_by_node() is not checked, thus null
pointer dereference will be triggered if of_find_device_by_node()
failed.
Fixes: bbe89c8e3d59 ("at_hdmac: move to generic DMA binding")
Signed-off-by: Yu Kuai <yukuai3@huawei.com>
Link: https://lore.kernel.org/r/20200817115728.1706719-2-yukuai3@huawei.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'drivers/dma')
| -rw-r--r-- | drivers/dma/at_hdmac.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/dma/at_hdmac.c b/drivers/dma/at_hdmac.c index dbc51154f122..86427f6ba78c 100644 --- a/drivers/dma/at_hdmac.c +++ b/drivers/dma/at_hdmac.c @@ -1677,6 +1677,8 @@ static struct dma_chan *at_dma_xlate(struct of_phandle_args *dma_spec, return NULL; dmac_pdev = of_find_device_by_node(dma_spec->np); + if (!dmac_pdev) + return NULL; dma_cap_zero(mask); dma_cap_set(DMA_SLAVE, mask); |