netdev - Re: [PATCH bpf-next V1] selftests/bpf: fix unmap bug in prog_tests/xdp

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Date:   Wed, 01 Feb 2023 23:50:17 +0000
From:   patchwork-bot+netdevbpf@...nel.org
To:     Jesper Dangaard Brouer <brouer@...hat.com>
Cc:     bpf@...r.kernel.org, sdf@...gle.com, netdev@...r.kernel.org,
        martin.lau@...nel.org, ast@...nel.org, daniel@...earbox.net,
        andrii@...nel.org, martin.lau@...ux.dev, song@...nel.org,
        yhs@...com, john.fastabend@...il.com, dsahern@...il.com,
        willemb@...gle.com, void@...ifault.com, kuba@...nel.org,
        xdp-hints@...-project.net
Subject: Re: [PATCH bpf-next V1] selftests/bpf: fix unmap bug in
 prog_tests/xdp_metadata.c

Hello:

This patch was applied to bpf/bpf-next.git (master)
by Daniel Borkmann <daniel@...earbox.net>:

On Wed, 01 Feb 2023 19:12:54 +0100 you wrote:
> The function close_xsk() unmap via munmap() the wrong memory pointer.
> 
> The call xsk_umem__delete(xsk->umem) have already freed xsk->umem.
> Thus the call to munmap(xsk->umem, UMEM_SIZE) will have unpredictable
> behavior that can lead to Segmentation fault elsewhere, as man page
> explain subsequent references to these pages will generate SIGSEGV.
> 
> [...]

Here is the summary with links:
  - [bpf-next,V1] selftests/bpf: fix unmap bug in prog_tests/xdp_metadata.c
    https://git.kernel.org/bpf/bpf-next/c/f2922f77a6a6

You are awesome, thank you!
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