On 4/29/2020 2:52 PM, Bhaumik Bhatt wrote:
From: Hemant Kumar <[email protected]>
When MHI Driver receives an EOT event, it reads xfer_len from the
event in the last TRE. The value is under control of the MHI device
and never validated by Host MHI driver. The value should never be
larger than the real size of the buffer but a malicious device can
set the value 0xFFFF as maximum. This causes driver to memory
overflow (both read or write). Fix this issue by reading minimum of
transfer length from event and the buffer length provided.
Signed-off-by: Hemant Kumar <[email protected]>
Signed-off-by: Bhaumik Bhatt <[email protected]>
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Reviewed-by: Jeffrey Hugo <[email protected]>
--
Jeffrey Hugo
Qualcomm Technologies, Inc. is a member of the
Code Aurora Forum, a Linux Foundation Collaborative Project.
