From: John Fastabend <john.fastabend@gmail.com>
To: maciej.fijalkowski@intel.com, ast@kernel.org,
daniel@iogearbox.net, andriin@fb.com
Cc: john.fastabend@gmail.com, bpf@vger.kernel.org, netdev@vger.kernel.org
Subject: [PATCH bpf 0/2] bpf, fix for subprogs with tailcalls
Date: Wed, 30 Jun 2021 12:40:47 -0700 [thread overview]
Message-ID: <20210630194049.46453-1-john.fastabend@gmail.com> (raw)
This fixes a use-after-free when using subprogs and tailcalls and adds
a test case to trigger the use-after-free.
John Fastabend (2):
bpf: track subprog poke correctly, fix use-after-free
bpf: selftest to verify mixing bpf2bpf calls and tailcalls with insn
patch
arch/x86/net/bpf_jit_comp.c | 4 ++
include/linux/bpf.h | 1 +
kernel/bpf/core.c | 7 +++-
kernel/bpf/verifier.c | 39 ++++---------------
.../selftests/bpf/prog_tests/tailcalls.c | 36 ++++++++++++-----
.../selftests/bpf/progs/tailcall_bpf2bpf4.c | 21 +++++++++-
6 files changed, 64 insertions(+), 44 deletions(-)
--
2.25.1
next reply other threads:[~2021-06-30 19:41 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-06-30 19:40 John Fastabend [this message]
2021-06-30 19:40 ` [PATCH bpf 1/2] bpf: track subprog poke correctly, fix use-after-free John Fastabend
2021-07-06 8:10 ` Daniel Borkmann
2021-06-30 19:40 ` [PATCH bpf 2/2] bpf: selftest to verify mixing bpf2bpf calls and tailcalls with insn patch John Fastabend
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