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| author | Dave Jiang | 2016-07-21 21:40:52 +0200 |
|---|---|---|
| committer | Vinod Koul | 2016-08-08 04:32:00 +0200 |
| commit | 2eab9b1a3006b4f7bf49c55ce23943170a0068db (patch) | |
| tree | 3fe2a110519635d3ede4a271ad6b9feb48be8cab /drivers/dma/ioat | |
| parent | Linux 4.8-rc1 (diff) | |
| download | kernel-qcow2-linux-2eab9b1a3006b4f7bf49c55ce23943170a0068db.tar.gz kernel-qcow2-linux-2eab9b1a3006b4f7bf49c55ce23943170a0068db.tar.xz kernel-qcow2-linux-2eab9b1a3006b4f7bf49c55ce23943170a0068db.zip | |
dmaengine: ioatdma: fix uninitialized array usage
Static analysis showed that unitialized array is being used for compare.
At line 850 when a dma_mapping_error() occurs, it jumps to dma_unmap. At
this point, dma_srcs has not been initialized. However, the code after
dma_unmap label checks dma_srcs for a comparison and thus is comparing
to random garbage in the array. Given that when dest_dma is being mapped
this is the first instance of mapping DMA memory and failed, there is
really nothing to be cleaned up and thus should jump to free_resources
label instead.
Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Diffstat (limited to 'drivers/dma/ioat')
| -rw-r--r-- | drivers/dma/ioat/init.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/dma/ioat/init.c b/drivers/dma/ioat/init.c index 7145f7716a92..015f7110b96d 100644 --- a/drivers/dma/ioat/init.c +++ b/drivers/dma/ioat/init.c @@ -828,7 +828,7 @@ static int ioat_xor_val_self_test(struct ioatdma_device *ioat_dma) dest_dma = dma_map_page(dev, dest, 0, PAGE_SIZE, DMA_FROM_DEVICE); if (dma_mapping_error(dev, dest_dma)) - goto dma_unmap; + goto free_resources; for (i = 0; i < IOAT_NUM_SRC_TEST; i++) dma_srcs[i] = DMA_ERROR_CODE; |