Re: [PATCH] linux-user: Avoid mmap of the last byte of the reserved_va

[Michael Tokarev]

29.06.2023 11:08, Richard Henderson wrote:
> There is an overflow problem in mmap_find_vma_reserved:
> when reserved_va == UINT32_MAX, end may overflow to 0.
> Rather than a larger rewrite at this time, simply avoid
> the final byte of the VA, which avoids searching the
> final page, which avoids the overflow.

This hack appears to fix known issues and apparently does not
introduce regressions.

Can it be applied to master and picked up from there, since
master is also broken?  You can revert it in the subsequent
patchset like the one you posted today.

You can add my:

Tested-by: Michael Tokarev <mjt@tls.msk.ru>
Reviewed-by: Michael Tokarev <mjt@tls.msk.ru>

Thanks!

/mjt