XUartPs_ReceiveBuffer corrupts memory
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Description
In commit: https://github.com/Xilinx/embeddedsw/commit/7ec11fb77629dccd06f29c44764af638cb216c41
"=" has been added to this line:
while((ReceivedCount <= InstancePtr->ReceiveBuffer.RemainingBytes)&&
That creates a buffer overrun. Remaining will become 2^32-1 and keeps writing.
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Research direction
Start by inspecting commit 7ec11fb77629dccd06f29c44764af638cb216c41 and the XUartPs_ReceiveBuffer entry point. Check the loop boundary involving ReceivedCount and RemainingBytes, then verify the boundary case that causes RemainingBytes to wrap; done means the buffer is no longer overrun.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- c
- Domain
- embedded-iot
- Issue type
- Bug
- Difficulty
- 2/5
- Estimated time
- 1-3 hours
- Activity status
- Stale
- Clarity
- Mostly clear
- Newbie friendliness
- 45/100