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| author | Matteo Croce <mcroce@redhat.com> | 2019-07-01 20:01:55 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-07-28 09:28:24 +0300 |
| commit | 7719f7253677b5a9a3db8b95d2861d32081cfca0 (patch) | |
| tree | 9bd3dade9238f739f243924e90458db255efa68b /block/blk-wbt.c | |
| parent | ce6994f56e7a6e1ac0630328e65fa2d9d919786d (diff) | |
| download | linux-7719f7253677b5a9a3db8b95d2861d32081cfca0.tar.xz | |
ipv4: don't set IPv6 only flags to IPv4 addresses
[ Upstream commit 2e60546368165c2449564d71f6005dda9205b5fb ]
Avoid the situation where an IPV6 only flag is applied to an IPv4 address:
# ip addr add 192.0.2.1/24 dev dummy0 nodad home mngtmpaddr noprefixroute
# ip -4 addr show dev dummy0
2: dummy0: <BROADCAST,NOARP,UP,LOWER_UP> mtu 1500 qdisc noqueue state UNKNOWN group default qlen 1000
inet 192.0.2.1/24 scope global noprefixroute dummy0
valid_lft forever preferred_lft forever
Or worse, by sending a malicious netlink command:
# ip -4 addr show dev dummy0
2: dummy0: <BROADCAST,NOARP,UP,LOWER_UP> mtu 1500 qdisc noqueue state UNKNOWN group default qlen 1000
inet 192.0.2.1/24 scope global nodad optimistic dadfailed home tentative mngtmpaddr noprefixroute stable-privacy dummy0
valid_lft forever preferred_lft forever
Signed-off-by: Matteo Croce <mcroce@redhat.com>
Reviewed-by: David Ahern <dsahern@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'block/blk-wbt.c')
0 files changed, 0 insertions, 0 deletions