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| author | Jia-Ju Bai <baijiaju1990@gmail.com> | 2019-07-29 10:08:49 +0800 |
|---|---|---|
| committer | Vinod Koul <vkoul@kernel.org> | 2019-08-08 19:03:49 +0530 |
| commit | 39c71a5b8212f4b502d9a630c6706ac723abd422 (patch) | |
| tree | 71765e0155a40a28aa6966208560a7743bbbf06a /drivers/dma | |
| parent | d105ef8120dd522c3233a1395ee0b318ed0929e8 (diff) | |
| download | linux-stable-39c71a5b8212f4b502d9a630c6706ac723abd422.tar.gz linux-stable-39c71a5b8212f4b502d9a630c6706ac723abd422.tar.bz2 linux-stable-39c71a5b8212f4b502d9a630c6706ac723abd422.zip | |
dmaengine: stm32-mdma: Fix a possible null-pointer dereference in stm32_mdma_irq_handler()
In stm32_mdma_irq_handler(), chan is checked on line 1368.
When chan is NULL, it is still used on line 1369:
dev_err(chan2dev(chan), "MDMA channel not initialized\n");
Thus, a possible null-pointer dereference may occur.
To fix this bug, "dev_dbg(mdma2dev(dmadev), ...)" is used instead.
Signed-off-by: Jia-Ju Bai <baijiaju1990@gmail.com>
Fixes: a4ffb13c8946 ("dmaengine: Add STM32 MDMA driver")
Link: https://lore.kernel.org/r/20190729020849.17971-1-baijiaju1990@gmail.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Diffstat (limited to 'drivers/dma')
| -rw-r--r-- | drivers/dma/stm32-mdma.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/dma/stm32-mdma.c b/drivers/dma/stm32-mdma.c index d6e919d3936a..1311de74bfdd 100644 --- a/drivers/dma/stm32-mdma.c +++ b/drivers/dma/stm32-mdma.c @@ -1366,7 +1366,7 @@ static irqreturn_t stm32_mdma_irq_handler(int irq, void *devid) chan = &dmadev->chan[id]; if (!chan) { - dev_err(chan2dev(chan), "MDMA channel not initialized\n"); + dev_dbg(mdma2dev(dmadev), "MDMA channel not initialized\n"); goto exit; } |