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| author | David Ahern | 2018-05-29 20:59:13 +0200 |
|---|---|---|
| committer | Daniel Borkmann | 2018-05-29 21:48:43 +0200 |
| commit | 9ce64f192d161acff17c99ceec7d9ce3db9252fa (patch) | |
| tree | 7f58b1c04639b92be5fa9ad82e91005c7df82a85 /net/core/filter.c | |
| parent | bpf: Drop mpls from bpf_fib_lookup (diff) | |
| download | kernel-qcow2-linux-9ce64f192d161acff17c99ceec7d9ce3db9252fa.tar.gz kernel-qcow2-linux-9ce64f192d161acff17c99ceec7d9ce3db9252fa.tar.xz kernel-qcow2-linux-9ce64f192d161acff17c99ceec7d9ce3db9252fa.zip | |
bpf: Verify flags in bpf_fib_lookup
Verify flags argument contains only known flags. Allows programs to probe
for support as more are added.
Signed-off-by: David Ahern <dsahern@gmail.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Diffstat (limited to 'net/core/filter.c')
| -rw-r--r-- | net/core/filter.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/net/core/filter.c b/net/core/filter.c index 0ce93edefb0e..81bd2e9fe8fc 100644 --- a/net/core/filter.c +++ b/net/core/filter.c @@ -4270,6 +4270,9 @@ BPF_CALL_4(bpf_xdp_fib_lookup, struct xdp_buff *, ctx, if (plen < sizeof(*params)) return -EINVAL; + if (flags & ~(BPF_FIB_LOOKUP_DIRECT | BPF_FIB_LOOKUP_OUTPUT)) + return -EINVAL; + switch (params->family) { #if IS_ENABLED(CONFIG_INET) case AF_INET: @@ -4304,6 +4307,9 @@ BPF_CALL_4(bpf_skb_fib_lookup, struct sk_buff *, skb, if (plen < sizeof(*params)) return -EINVAL; + if (flags & ~(BPF_FIB_LOOKUP_DIRECT | BPF_FIB_LOOKUP_OUTPUT)) + return -EINVAL; + switch (params->family) { #if IS_ENABLED(CONFIG_INET) case AF_INET: |