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| author | David Daney <david.daney@cavium.com> | 2017-03-14 14:21:42 -0700 |
|---|---|---|
| committer | Ralf Baechle <ralf@linux-mips.org> | 2017-04-10 11:56:05 +0200 |
| commit | 64b2dd3a8be3ec4e08fd5a3dab0620d9c6c398fe (patch) | |
| tree | 9bf9fe780c82a4a1c7ffe69dd8ddf9f1cc69c7d9 /arch/mips/net | |
| parent | 4ad701532a758202a422a8588f4d09c058c9a5dc (diff) | |
| download | linux-64b2dd3a8be3ec4e08fd5a3dab0620d9c6c398fe.tar.bz2 | |
MIPS: BPF: Use unsigned access for unsigned SKB fields.
The SKB vlan_tci and queue_mapping fields are unsigned, don't sign
extend these in the BPF JIT. In the vlan_tci case, the value gets
masked so the change is not needed for correctness, but do it anyway
for agreement with the types defined in struct sk_buff.
Signed-off-by: David Daney <david.daney@cavium.com>
Cc: James Hogan <james.hogan@imgtec.com>
Cc: Alexei Starovoitov <ast@kernel.org>
Cc: Steven J. Hill <steven.hill@cavium.com>
Cc: linux-mips@linux-mips.org
Cc: netdev@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/15746/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch/mips/net')
| -rw-r--r-- | arch/mips/net/bpf_jit.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/arch/mips/net/bpf_jit.c b/arch/mips/net/bpf_jit.c index 880e329310ee..a68cd36a892f 100644 --- a/arch/mips/net/bpf_jit.c +++ b/arch/mips/net/bpf_jit.c @@ -1156,7 +1156,7 @@ jmp_cmp: BUILD_BUG_ON(FIELD_SIZEOF(struct sk_buff, vlan_tci) != 2); off = offsetof(struct sk_buff, vlan_tci); - emit_half_load(r_s0, r_skb, off, ctx); + emit_half_load_unsigned(r_s0, r_skb, off, ctx); if (code == (BPF_ANC | SKF_AD_VLAN_TAG)) { emit_andi(r_A, r_s0, (u16)~VLAN_TAG_PRESENT, ctx); } else { @@ -1183,7 +1183,7 @@ jmp_cmp: BUILD_BUG_ON(offsetof(struct sk_buff, queue_mapping) > 0xff); off = offsetof(struct sk_buff, queue_mapping); - emit_half_load(r_A, r_skb, off, ctx); + emit_half_load_unsigned(r_A, r_skb, off, ctx); break; default: pr_debug("%s: Unhandled opcode: 0x%02x\n", __FILE__, |