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| author | Jia-Ju Bai <baijiaju1990@gmail.com> | 2019-07-29 10:08:49 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-09-06 10:21:56 +0200 |
| commit | 71d24f45f905a7ab481ed9c62ffc400b7961221d (patch) | |
| tree | e151845ae6f238c8581ad2835dded9b7b39d8b67 /drivers | |
| parent | 377ebe613ed8fa55b19e6cc72d289f261e10a28d (diff) | |
| download | linux-stable-71d24f45f905a7ab481ed9c62ffc400b7961221d.tar.gz linux-stable-71d24f45f905a7ab481ed9c62ffc400b7961221d.tar.bz2 linux-stable-71d24f45f905a7ab481ed9c62ffc400b7961221d.zip | |
dmaengine: stm32-mdma: Fix a possible null-pointer dereference in stm32_mdma_irq_handler()
[ Upstream commit 39c71a5b8212f4b502d9a630c6706ac723abd422 ]
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>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'drivers')
| -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 06dd1725375e..8c3c3e5b812a 100644 --- a/drivers/dma/stm32-mdma.c +++ b/drivers/dma/stm32-mdma.c @@ -1376,7 +1376,7 @@ 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; } |