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| author | Taehee Yoo <ap420073@gmail.com> | 2020-04-07 13:23:21 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2020-04-07 18:34:18 -0700 |
| commit | 4faab8c446def7667adf1f722456c2f4c304069c (patch) | |
| tree | c941a6c65680bdb21751b1bf59f3a51bab3f918c /net/hsr | |
| parent | ab74110205543a8d57eff64c6af64235aa23c09b (diff) | |
| download | lwn-4faab8c446def7667adf1f722456c2f4c304069c.tar.gz lwn-4faab8c446def7667adf1f722456c2f4c304069c.zip | |
hsr: check protocol version in hsr_newlink()
In the current hsr code, only 0 and 1 protocol versions are valid.
But current hsr code doesn't check the version, which is received by
userspace.
Test commands:
ip link add dummy0 type dummy
ip link add dummy1 type dummy
ip link add hsr0 type hsr slave1 dummy0 slave2 dummy1 version 4
In the test commands, version 4 is invalid.
So, the command should be failed.
After this patch, following error will occur.
"Error: hsr: Only versions 0..1 are supported."
Fixes: ee1c27977284 ("net/hsr: Added support for HSR v1")
Signed-off-by: Taehee Yoo <ap420073@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/hsr')
| -rw-r--r-- | net/hsr/hsr_netlink.c | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/net/hsr/hsr_netlink.c b/net/hsr/hsr_netlink.c index 5465a395da04..1decb25f6764 100644 --- a/net/hsr/hsr_netlink.c +++ b/net/hsr/hsr_netlink.c @@ -69,10 +69,16 @@ static int hsr_newlink(struct net *src_net, struct net_device *dev, else multicast_spec = nla_get_u8(data[IFLA_HSR_MULTICAST_SPEC]); - if (!data[IFLA_HSR_VERSION]) + if (!data[IFLA_HSR_VERSION]) { hsr_version = 0; - else + } else { hsr_version = nla_get_u8(data[IFLA_HSR_VERSION]); + if (hsr_version > 1) { + NL_SET_ERR_MSG_MOD(extack, + "Only versions 0..1 are supported"); + return -EINVAL; + } + } return hsr_dev_finalize(dev, link, multicast_spec, hsr_version, extack); } |