tipc: check link name with right length in tipc_nl_compat_link_set
authorXin Long <lucien.xin@gmail.com>
Sun, 31 Mar 2019 14:50:09 +0000 (22:50 +0800)
committerDavid S. Miller <davem@davemloft.net>
Sun, 31 Mar 2019 23:45:57 +0000 (16:45 -0700)
commit8c63bf9ab4be8b83bd8c34aacfd2f1d2c8901c8a
tree8904600a024d55772611363c2d7def30bbeaa612
parent6f07e5f06c8712acc423485f657799fc8e11e56c
tipc: check link name with right length in tipc_nl_compat_link_set

A similar issue as fixed by Patch "tipc: check bearer name with right
length in tipc_nl_compat_bearer_enable" was also found by syzbot in
tipc_nl_compat_link_set().

The length to check with should be 'TLV_GET_DATA_LEN(msg->req) -
offsetof(struct tipc_link_config, name)'.

Reported-by: syzbot+de00a87b8644a582ae79@syzkaller.appspotmail.com
Signed-off-by: Xin Long <lucien.xin@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
net/tipc/netlink_compat.c