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Re: [Qemu-arm] [PATCH v7 2/6] linux-user: Validate mmap/mprotect prot va
From: |
Peter Maydell |
Subject: |
Re: [Qemu-arm] [PATCH v7 2/6] linux-user: Validate mmap/mprotect prot value |
Date: |
Tue, 20 Aug 2019 16:24:03 +0100 |
On Sat, 3 Aug 2019 at 22:08, Richard Henderson
<address@hidden> wrote:
>
> The kernel will return -EINVAL for bits set in the prot argument
> that are unknown or invalid. Previously we were simply cropping
> out the bits that we care about.
>
> Introduce validate_prot_to_pageflags to perform this check in a
> single place between the two syscalls. Differentiate between
> the target and host versions of prot. Compute the qemu internal
> page_flags value at the same time.
>
> Signed-off-by: Richard Henderson <address@hidden>
Reviewed-by: Peter Maydell <address@hidden>
thanks
-- PMM