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authorDaniel Borkmann <daniel@iogearbox.net>2015-08-31 15:58:46 +0200
committerDavid S. Miller <davem@davemloft.net>2015-08-31 12:34:00 -0700
commitb8d3e4163a3562d7cba486687904383e78e7dd6a (patch)
tree89ae9d8715c49d32593acad50712c4a6050d8969 /net/ipv4
parent1bb14807bc761a88bb9d319e7bf519eebf4c82ec (diff)
downloadlinux-b8d3e4163a3562d7cba486687904383e78e7dd6a.tar.bz2
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/ipv4')
-rw-r--r--net/ipv4/fib_semantics.c2
1 files changed, 2 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;
}