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| author | Taehee Yoo <ap420073@gmail.com> | 2020-04-07 16:23:21 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-04-21 10:03:03 +0300 |
| commit | 32759da24e5e420bb7cfbdd4833d0e4b278dbbf3 (patch) | |
| tree | 8373cb0301b5f33ed3687efc6ebe36d85d76b980 /net | |
| parent | 10cea886f08910092732bc580e2319557fd8bef3 (diff) | |
| download | linux-32759da24e5e420bb7cfbdd4833d0e4b278dbbf3.tar.xz | |
hsr: check protocol version in hsr_newlink()
[ Upstream commit 4faab8c446def7667adf1f722456c2f4c304069c ]
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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'net')
| -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 37708dabebd1..606bc7fe5cc7 100644 --- a/net/hsr/hsr_netlink.c +++ b/net/hsr/hsr_netlink.c @@ -64,10 +64,16 @@ 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); } |