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.
>
> Cc: qemu-stable@nongnu.org
> Resolves: https://gitlab.com/qemu-project/qemu/-/issues/1741
> Fixes: 95059f9c ("include/exec: Change reserved_va semantics to last byte")
> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

So, I pushed this to debian (where we've seen multiple failures),
let's see how it goes..

/mjt