This is a note to let you know that I've just added the patch titled
bpf/verifier: reject BPF_ALU64|BPF_END
to the 4.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
bpf-verifier-reject-bpf_alu64-bpf_end.patch
and it can be found in the queue-4.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From foo@baz Thu Oct 19 13:36:51 CEST 2017
From: Edward Cree <ecree@xxxxxxxxxxxxxx>
Date: Fri, 15 Sep 2017 14:37:38 +0100
Subject: bpf/verifier: reject BPF_ALU64|BPF_END
From: Edward Cree <ecree@xxxxxxxxxxxxxx>
[ 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@xxxxxxxxxxxxxx>
Acked-by: Alexei Starovoitov <ast@xxxxxxxxxx>
Acked-by: Daniel Borkmann <daniel@xxxxxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
kernel/bpf/verifier.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
--- a/kernel/bpf/verifier.c
+++ b/kernel/bpf/verifier.c
@@ -1033,7 +1033,8 @@ static int check_alu_op(struct verifier_
}
} 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;
}
Patches currently in stable-queue which might be from ecree@xxxxxxxxxxxxxx are
queue-4.4/bpf-verifier-reject-bpf_alu64-bpf_end.patch