dmaengine: at_hdmac: fix potential NULL pointer dereference in atc_prep_dma_interleaved
authorGustavo A. R. Silva <garsilva@embeddedor.com>
Mon, 20 Nov 2017 14:28:14 +0000 (08:28 -0600)
committerVinod Koul <vinod.koul@intel.com>
Wed, 29 Nov 2017 14:18:17 +0000 (19:48 +0530)
commit62a277d43d47e74972de44d33bd3763e31992414
tree4b91a3bff3d3537ecd82fc3ca959517a66f464ec
parent5c9afbda911ce20b3f2181d1e440a0222e1027dd
dmaengine: at_hdmac: fix potential NULL pointer dereference in atc_prep_dma_interleaved

_xt_ is being dereferenced before it is null checked, hence there is a
potential null pointer dereference.

Fix this by moving the pointer dereference after _xt_ has been null
checked.

This issue was detected with the help of Coccinelle.

Fixes: 4483320e241c ("dmaengine: Use Pointer xt after NULL check.")
Signed-off-by: Gustavo A. R. Silva <garsilva@embeddedor.com>
Acked-by: Ludovic Desroches <ludovic.desroches@microchip.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
drivers/dma/at_hdmac.c