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pcie_fuzz: fuzz_mmio_bar() function should not read/write entry MMIO range. #1740

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congzhang0 opened this issue Apr 11, 2023 · 0 comments
Open

pcie_fuzz: fuzz_mmio_bar() function should not read/write entry MMIO range. #1740

congzhang0 opened this issue Apr 11, 2023 · 0 comments

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@congzhang0
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congzhang0 commented Apr 11, 2023 •
edited

The fuzz_mmio_bar() function is trying to read and write the entire MMIO range with DWORD, I think this approach is incorrect, at least the following two types of register cannot be read and written:

  1. The register is non-visible to firmware/driver/OS.
  2. The register with write-clear behaviour.

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@congzhang0 congzhang0 changed the title pcie_fuzz: pcie_fuzz: fuzz_mmio_bar() function should not read/write entry MMIO range. Apr 11, 2023
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