From: Chris Mason <mason@kernel.org>
To: mason@kernel.org, bpf@vger.kernel.org
Cc: ast@kernel.org, daniel@iogearbox.net, andrii@kernel.org,
eddyz87@gmail.com, memxor@gmail.com, brauner@kernel.org
Subject: [PATCH RFC 0/2] Fix use-after-free related to binfmt-misc-bpf.c
Date: Wed, 16 Sep 2026 18:33:01 +0000 [thread overview]
Message-ID: <20260916183303.3504885-1-mason@kernel.org> (raw)
Hi everyone,
Christian asked me to run the recent binfmt_misc_bpf.c changes through
reviews and this bug popped out. The bug is reproduced, but I'm not at
all confident in the fix.
-chris
Chris Mason (2):
bpf: fix UAF via trusted BTF walk after release
selftests/bpf: test f_inode walk around bpf_put_file()
kernel/bpf/verifier.c | 16 +++++++++++
.../selftests/bpf/progs/verifier_vfs_accept.c | 26 ++++++++++++++++++
.../selftests/bpf/progs/verifier_vfs_reject.c | 27 +++++++++++++++++++
3 files changed, 69 insertions(+)
--
2.54.0
next reply other threads:[~2026-09-16 18:33 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-09-16 18:33 Chris Mason [this message]
2026-09-16 18:33 ` [PATCH RFC 1/2] bpf: fix UAF via trusted BTF walk after release Chris Mason
2026-09-16 18:46 ` Kumar Kartikeya Dwivedi
2026-09-16 19:19 ` Chris Mason
2026-09-16 18:33 ` [PATCH RFC 2/2] selftests/bpf: test f_inode walk around bpf_put_file() Chris Mason
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