Re: [PATCH 1/2] remoteproc: qcom_q6v5_pas: Fix 64-bit address truncation in dump and translation

[Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>]

On 9/21/26 6:36 PM, Anup Vishwakarma wrote:
> In qcom_pas_segment_dump() and qcom_pas_da_to_va(), the offset
> calculation results are stored in signed 32-bit integers (total_offset
> and offset). On 64-bit architectures, this can truncate the 64-bit
> address arithmetic result if the subtraction or addition exceeds 2GB,
> causing erroneous bounds check failures or invalid pointer translations.
> 
> Fix this by using unsigned size_t offsets and explicit comparison-based
> bounds checking. Check that the address is above the base before
> subtracting, and use the form (len > mem_size - offset) instead of
> (offset + len > mem_size) to avoid unsigned overflow.
> 
> Signed-off-by: Anup Vishwakarma <anup.vishwakarma@oss.qualcomm.com>
> ---

Reviewed-by: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>

Konrad