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| author | Edward Cree <ecree@solarflare.com> | 2017-09-15 14:37:38 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-10-21 17:09:02 +0200 |
| commit | 2ec54b21dd7b25df0f070f1d67db2ea18987e69e (patch) | |
| tree | 97682c9dec93dcfd14df8fb10701bf9daf0bf042 /kernel | |
| parent | dee4506f067a026b38b3e01dd59c1257b810d186 (diff) | |
| download | linux-stable-2ec54b21dd7b25df0f070f1d67db2ea18987e69e.tar.gz linux-stable-2ec54b21dd7b25df0f070f1d67db2ea18987e69e.tar.bz2 linux-stable-2ec54b21dd7b25df0f070f1d67db2ea18987e69e.zip | |
bpf/verifier: reject BPF_ALU64|BPF_END
[ Upstream commit e67b8a685c7c984e834e3181ef4619cd7025a136 ]
Neither ___bpf_prog_run nor the JITs accept it.
Also adds a new test case.
Fixes: 17a5267067f3 ("bpf: verifier (add verifier core)")
Signed-off-by: Edward Cree <ecree@solarflare.com>
Acked-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/bpf/verifier.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/kernel/bpf/verifier.c b/kernel/bpf/verifier.c index 863e24f1e62e..70dc6dcf8649 100644 --- a/kernel/bpf/verifier.c +++ b/kernel/bpf/verifier.c @@ -1033,7 +1033,8 @@ static int check_alu_op(struct verifier_env *env, struct bpf_insn *insn) } } else { if (insn->src_reg != BPF_REG_0 || insn->off != 0 || - (insn->imm != 16 && insn->imm != 32 && insn->imm != 64)) { + (insn->imm != 16 && insn->imm != 32 && insn->imm != 64) || + BPF_CLASS(insn->code) == BPF_ALU64) { verbose("BPF_END uses reserved fields\n"); return -EINVAL; } |