linux-kernel - [PATCH 5.15.y 0/5] Backport bounds checks for bpf

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Message-ID: <20240417233517.3044316-1-edliaw@google.com>
Date: Wed, 17 Apr 2024 23:35:02 +0000
From: Edward Liaw <edliaw@...gle.com>
To: stable@...r.kernel.org, Alexei Starovoitov <ast@...nel.org>, 
	Daniel Borkmann <daniel@...earbox.net>, 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>, 
	Hao Luo <haoluo@...gle.com>
Cc: bpf@...r.kernel.org, kernel-team@...roid.com, 
	Edward Liaw <edliaw@...gle.com>, netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH 5.15.y 0/5] Backport bounds checks for bpf

These backports fix CVE-2021-4204, CVE-2022-23222 for 5.15.y.

This includes a conflict resolution with 45ce4b4f9009 ("bpf: Fix crash
due to out of bounds access into reg2btf_ids.") which was cherry-picked
previously.
Link: https://lore.kernel.org/all/20220428235751.103203-11-haoluo@google.com/

They were tested on 5.15.94 to pass LTP test bpf_prog06 with no
regressions from the bpf selftests.

Daniel Borkmann (4):
  bpf: Generalize check_ctx_reg for reuse with other types
  bpf: Generally fix helper register offset check
  bpf: Fix out of bounds access for ringbuf helpers
  bpf: Fix ringbuf memory type confusion when passing to helpers

Kumar Kartikeya Dwivedi (1):
  bpf: Extend kfunc with PTR_TO_CTX, PTR_TO_MEM argument support

 include/linux/bpf.h          |  9 +++-
 include/linux/bpf_verifier.h |  4 +-
 kernel/bpf/btf.c             | 93 ++++++++++++++++++++++++++++--------
 kernel/bpf/verifier.c        | 66 +++++++++++++++++--------
 4 files changed, 129 insertions(+), 43 deletions(-)

--
2.44.0.769.g3c40516874-goog