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android_kernel_samsung_sm8650/drivers/dma/dw-axi-dmac
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Kees Cook c387ee97ae dmaengine: dw-axi-dmac: Do not dereference NULL structure 
[ Upstream commit be4d46edeee4b2459d2f53f37ada88bbfb634b6c ]

If "vdesc" is NULL, it cannot be used with vd_to_axi_desc(). Leave
"bytes" unchanged at 0. Seen under GCC 13 with -Warray-bounds:

../drivers/dma/dw-axi-dmac/dw-axi-dmac-platform.c: In function 'dma_chan_tx_status':
../drivers/dma/dw-axi-dmac/dw-axi-dmac-platform.c:329:46: warning: array subscript 0 is outside array bounds of 'struct
virt_dma_desc[46116860184273879]' [-Warray-bounds=]
  329 |                 bytes = vd_to_axi_desc(vdesc)->length;
      |                                              ^~

Fixes: 8e55444da6 ("dmaengine: dw-axi-dmac: Support burst residue granularity")
Cc: Eugeniy Paltsev <Eugeniy.Paltsev@synopsys.com>
Cc: Vinod Koul <vkoul@kernel.org>
Cc: dmaengine@vger.kernel.org
Signed-off-by: Kees Cook <keescook@chromium.org>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20230127223623.never.507-kees@kernel.org
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2023-03-10 09:33:39 +01:00
..
dw-axi-dmac-platform.c dmaengine: dw-axi-dmac: Do not dereference NULL structure 2023-03-10 09:33:39 +01:00
dw-axi-dmac.h dmaengine: dw-axi-dmac: cleanup comments 2022-03-11 16:05:01 +05:30
Makefile treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00