diff options
| author | Markos Chandras <markos.chandras@imgtec.com> | 2014-06-23 10:38:52 +0100 |
|---|---|---|
| committer | Ralf Baechle <ralf@linux-mips.org> | 2014-06-26 10:48:21 +0100 |
| commit | 6e86c59d4d0d04e7ebefd05b8af245c968892f81 (patch) | |
| tree | 1e144d5ff5a30b65ac01ee146bbcd444e1137741 | |
| parent | 1ab24a4e3de1ec37d8ed255841d2d94d77e8a4f4 (diff) | |
MIPS: bpf: Use correct mask for VLAN_TAG case
Using VLAN_VID_MASK is not correct to get the vlan tag. Use
~VLAN_PRESENT_MASK instead and make sure it's u16 so the top 16-bits
will be removed. This will ensure that the emit_andi() code will not
treat this as a big 32-bit unsigned value.
Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>
Cc: David S. Miller <davem@davemloft.net>
Cc: Daniel Borkmann <dborkman@redhat.com>
Cc: Alexei Starovoitov <ast@plumgrid.com>
Cc: netdev@vger.kernel.org
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/7127/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
| -rw-r--r-- | arch/mips/net/bpf_jit.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/mips/net/bpf_jit.c b/arch/mips/net/bpf_jit.c index 500f97fdc0e1..a4d1b76e7373 100644 --- a/arch/mips/net/bpf_jit.c +++ b/arch/mips/net/bpf_jit.c @@ -1317,7 +1317,7 @@ jmp_cmp: off = offsetof(struct sk_buff, vlan_tci); emit_half_load(r_s0, r_skb, off, ctx); if (code == (BPF_ANC | SKF_AD_VLAN_TAG)) - emit_andi(r_A, r_s0, VLAN_VID_MASK, ctx); + emit_andi(r_A, r_s0, (u16)~VLAN_TAG_PRESENT, ctx); else emit_andi(r_A, r_s0, VLAN_TAG_PRESENT, ctx); break; |