linux-kernel - [PATCH bpf v3 0/2] Fix kprobe_multi interface issues for 5.18

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Message-ID: <cover.1652876187.git.esyr@redhat.com>
Date:   Wed, 18 May 2022 14:22:06 +0200
From:   Eugene Syromiatnikov <esyr@...hat.com>
To:     Jiri Olsa <jolsa@...nel.org>,
        Masami Hiramatsu <mhiramat@...nel.org>,
        Steven Rostedt <rostedt@...dmis.org>,
        Ingo Molnar <mingo@...hat.com>,
        Alexei Starovoitov <ast@...nel.org>,
        Daniel Borkmann <daniel@...earbox.net>
Cc:     Andrii Nakryiko <andrii@...nel.org>,
        Martin KaFai Lau <kafai@...com>,
        Song Liu <songliubraving@...com>, Yonghong Song <yhs@...com>,
        John Fastabend <john.fastabend@...il.com>,
        KP Singh <kpsingh@...nel.org>, netdev@...r.kernel.org,
        bpf@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH bpf v3 0/2] Fix kprobe_multi interface issues for 5.18

Hello.

While [1] seems to require additional work[2] due to changes
in the interface (and it has already been re-targeted for bpf-next),
I would like to ask to consider the following two patches, that fix
possible out-of-bounds write and properly disable the interface
for 32-bit compat user space, for the 5.18 release.  Thank you.

[1] https://lore.kernel.org/lkml/cover.1652772731.git.esyr@redhat.com/
[2] https://lore.kernel.org/lkml/YoTXiAk1EpZ0rLKE@krava/

Eugene Syromiatnikov (2):
  bpf_trace: check size for overflow in bpf_kprobe_multi_link_attach
  bpf_trace: bail out from bpf_kprobe_multi_link_attach when in compat

 kernel/trace/bpf_trace.c | 15 +++++++++------
 1 file changed, 9 insertions(+), 6 deletions(-)

-- 
2.1.4