Re: [PATCH v1] dmaengine: imx-sdma: fix kernel hangs with SLUB slab allocator

[Vinod Koul]

On 24-09-19, 09:49, Robin Gong wrote:
> 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).

Applied, thanks

-- 
~Vinod