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| author |   Robin Gong <yibin.gong@nxp.com> | 2019-09-24 09:49:18 +0000 |
|---|---|---|
| committer |   Vinod Koul <vkoul@kernel.org> | 2019-10-14 13:33:44 +0530 |
| commit | bd73dfabdda280fc5f05bdec79b6721b4b2f035f (patch) | |
| tree | 72b324c9ea374683617bad75583123022515eab7 /include | |
| parent | dmaengine: tegra210-adma: fix transfer failure (diff) | |
| download | linux-dev-bd73dfabdda280fc5f05bdec79b6721b4b2f035f.tar.xz linux-dev-bd73dfabdda280fc5f05bdec79b6721b4b2f035f.zip | |
dmaengine: imx-sdma: fix size check for sdma script_number
Illegal memory will be touch if SDMA_SCRIPT_ADDRS_ARRAY_SIZE_V3
(41) exceed the size of structure sdma_script_start_addrs(40),
thus cause memory corrupt such as slob block header so that kernel
trap into while() loop forever in slob_free(). Please refer to below
code piece in imx-sdma.c:
for (i = 0; i < sdma->script_number; i++)
if (addr_arr[i] > 0)
saddr_arr[i] = addr_arr[i]; /* memory corrupt here */
That issue was brought by commit a572460be9cf ("dmaengine: imx-sdma: Add
support for version 3 firmware") because SDMA_SCRIPT_ADDRS_ARRAY_SIZE_V3
(38->41 3 scripts added) not align with script number added in
sdma_script_start_addrs(2 scripts).
Fixes: a572460be9cf ("dmaengine: imx-sdma: Add support for version 3 firmware")
Cc: stable@vger.kernel
Link: https://www.spinics.net/lists/arm-kernel/msg754895.html
Signed-off-by: Robin Gong <yibin.gong@nxp.com>
Reported-by: Jurgen Lambrecht <J.Lambrecht@TELEVIC.com>
Link: https://lore.kernel.org/r/1569347584-3478-1-git-send-email-yibin.gong@nxp.com
[vkoul: update the patch title]
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/platform_data/dma-imx-sdma.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/include/linux/platform_data/dma-imx-sdma.h b/include/linux/platform_data/dma-imx-sdma.h index 6eaa53cef0bd..30e676b36b24 100644 --- a/include/linux/platform_data/dma-imx-sdma.h +++ b/include/linux/platform_data/dma-imx-sdma.h @@ -51,7 +51,10 @@ struct sdma_script_start_addrs { /* End of v2 array */ s32 zcanfd_2_mcu_addr; s32 zqspi_2_mcu_addr; + s32 mcu_2_ecspi_addr; /* End of v3 array */ + s32 mcu_2_zqspi_addr; + /* End of v4 array */ }; /** |