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buffer: prevent cache corruption #7808

Merged
merged 1 commit into from
Jun 30, 2023
Merged

buffer: prevent cache corruption #7808

merged 1 commit into from
Jun 30, 2023

Commits on Jun 15, 2023

  1. buffer: prevent cache corruption 

    Recent research discovered a set of potential issues related with
cache prefetch. Specifically it seems like uncached access to memory
can cause cache prefetch. This can cause problems in buffer_attach()
and buffer_detach() where buffers are added to or removed from lists
respectively via uncached addresses, after which they can be used via
cached addresses. Add proper cache synchronisation and interrupt
locking to protect against such memory corruption.

Signed-off-by: Guennadi Liakhovetski <[email protected]>
    @lyakh
    lyakh committed Jun 15, 2023
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