From: Barret Rhoden <brho@google.com>
To: Alexei Starovoitov <alexei.starovoitov@gmail.com>
Cc: bpf@vger.kernel.org, daniel@iogearbox.net, andrii@kernel.org,
martin.lau@kernel.org, memxor@gmail.com, eddyz87@gmail.com,
pengfei.xu@intel.com, kernel-team@fb.com
Subject: Re: [PATCH v2 bpf] bpf: Fix remap of arena.
Date: Mon, 17 Jun 2024 13:52:10 -0400 [thread overview]
Message-ID: <8a281b63-6596-4538-960d-7cd74df17d6b@google.com> (raw)
In-Reply-To: <20240617171812.76634-1-alexei.starovoitov@gmail.com>
On 6/17/24 13:18, Alexei Starovoitov wrote:
> From: Alexei Starovoitov <ast@kernel.org>
>
> The bpf arena logic didn't account for mremap operation. Add a refcnt for
> multiple mmap events to prevent use-after-free in arena_vm_close.
>
> Reported-by: Pengfei Xu <pengfei.xu@intel.com>
> Closes: https://lore.kernel.org/bpf/Zmuw29IhgyPNKnIM@xpf.sh.intel.com/
> Fixes: 317460317a02 ("bpf: Introduce bpf_arena.")
> Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Reviewed-by: Barret Rhoden <brho@google.com>
next prev parent reply other threads:[~2024-06-17 17:52 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-06-17 17:18 [PATCH v2 bpf] bpf: Fix remap of arena Alexei Starovoitov
2024-06-17 17:52 ` Barret Rhoden [this message]
2024-06-18 2:02 ` Pengfei Xu
2024-06-18 4:43 ` kernel test robot
2024-06-18 14:49 ` Alexei Starovoitov
2024-06-18 15:28 ` Daniel Borkmann
2024-06-18 15:30 ` patchwork-bot+netdevbpf
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