Re: [PULL 0/5] Linux user brk fixes patches

[Peter Maydell <peter.maydell@linaro.org>]

On Wed, 19 Jul 2023 at 16:53, Helge Deller <deller@gmx.de> wrote:
>
> The following changes since commit 361d5397355276e3007825cc17217c1e4d4320f7:
>
>   Merge tag 'block-pull-request' of https://gitlab.com/stefanha/qemu into staging (2023-07-17 15:49:27 +0100)
>
> are available in the Git repository at:
>
>   https://github.com/hdeller/qemu-hppa.git tags/linux-user-brk-fixes-pull-request
>
> for you to fetch changes up to 518f32221af759a29500ac172c4c857bef142067:
>
>   linux-user: Fix qemu-arm to run static armhf binaries (2023-07-18 20:42:05 +0200)
>
> ----------------------------------------------------------------
> linux-user: brk() syscall fixes and armhf static binary fix
>
> Commit 86f04735ac ("linux-user: Fix brk() to release pages") introduced
> the possibility for userspace applications to reduce memory footprint by
> calling brk() with a lower address and as such free up memory, the same
> way as the Linux kernel allows on physical machines.
>
> This change introduced some failures for applications with errors like
> - accesing bytes above the brk heap address on the same page,
> - freeing memory below the initial brk address,
> and introduced a behaviour which isn't done by the kernel (e.g. zeroing
> memory above brk).
>
> This patch series fixes those issues and has been tested with existing
> programs (e.g. upx).
>
> Additionally one patch fixes running static armhf executables (e.g. fstype)
> which was broken since qemu-8.0.
>
> Changes in v2:
> - dropped patch to revert d28b3c90cfad ("linux-user: Make sure initial brk(0)
>   is page-aligned")
> - rephrased some commit messages
> - fixed Cc email addresses, added new ones
> - added R-b tags
>
> Helge


Applied, thanks.

Please update the changelog at https://wiki.qemu.org/ChangeLog/8.1
for any user-visible changes.

-- PMM