linux-kernel - [bpf-next 0/3] potential memleak and use after free in bpf verifier

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Date:   Wed, 7 Jul 2021 04:38:08 +0000
From:   He Fengqing <hefengqing@...wei.com>
To:     <ast@...nel.org>, <daniel@...earbox.net>, <andrii@...nel.org>,
        <kafai@...com>, <songliubraving@...com>, <yhs@...com>,
        <john.fastabend@...il.com>, <kpsingh@...nel.org>
CC:     <davem@...emloft.net>, <kuba@...nel.org>, <netdev@...r.kernel.org>,
        <bpf@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: [bpf-next 0/3] potential memleak and use after free in bpf verifier

While reading the code of bpf verifier, I found these two issues.
Patch 1 move the bpf_prog_clone_free function into filter.h, so
we can use it in other file. Patch 2 fix memleak in an error
handling path in bpf_patch_insn_data function.
Patch 3 fix a use after free in bpf_check function.

He Fengqing (3):
  bpf: Move bpf_prog_clone_free into filter.h file
  bpf: Fix a memory leak in an error handling path in
    'bpf_patch_insn_data()'
  bpf: Fix a use after free in bpf_check()

 include/linux/filter.h | 17 ++++++++++++-
 kernel/bpf/core.c      | 27 +++++---------------
 kernel/bpf/verifier.c  | 58 ++++++++++++++++++++++++++++++++----------
 net/core/filter.c      |  2 +-
 4 files changed, 68 insertions(+), 36 deletions(-)

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2.25.1