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| author | Daniel Borkmann <daniel@iogearbox.net> | 2015-08-31 15:58:46 +0200 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2015-08-31 21:34:00 +0200 |
| commit | b8d3e4163a3562d7cba486687904383e78e7dd6a (patch) | |
| tree | 89ae9d8715c49d32593acad50712c4a6050d8969 /net | |
| parent | net: fib6: reduce identation in ip6_convert_metrics (diff) | |
| download | linux-b8d3e4163a3562d7cba486687904383e78e7dd6a.tar.xz linux-b8d3e4163a3562d7cba486687904383e78e7dd6a.zip | |
fib, fib6: reject invalid feature bits
Feature bits that are invalid should not be accepted by the kernel,
only the lower 4 bits may be configured, but not the remaining ones.
Even from these 4, 2 of them are unused.
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
| -rw-r--r-- | net/ipv4/fib_semantics.c | 2 | ||||
| -rw-r--r-- | net/ipv6/route.c | 2 |
2 files changed, 4 insertions, 0 deletions
diff --git a/net/ipv4/fib_semantics.c b/net/ipv4/fib_semantics.c index 88afbae893f0..115a08e70d43 100644 --- a/net/ipv4/fib_semantics.c +++ b/net/ipv4/fib_semantics.c @@ -908,6 +908,8 @@ fib_convert_metrics(struct fib_info *fi, const struct fib_config *cfg) val = 65535 - 40; if (type == RTAX_MTU && val > 65535 - 15) val = 65535 - 15; + if (type == RTAX_FEATURES && (val & ~RTAX_FEATURE_MASK)) + return -EINVAL; fi->fib_metrics[type - 1] = val; } diff --git a/net/ipv6/route.c b/net/ipv6/route.c index 0261b721b34b..8771530df45e 100644 --- a/net/ipv6/route.c +++ b/net/ipv6/route.c @@ -1728,6 +1728,8 @@ static int ip6_convert_metrics(struct mx6_config *mxc, } else { val = nla_get_u32(nla); } + if (type == RTAX_FEATURES && (val & ~RTAX_FEATURE_MASK)) + goto err; mp[type - 1] = val; __set_bit(type - 1, mxc->mx_valid); |