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inet: fix improper empty comparison 

When doing my reuseport rework I screwed up and changed a

if (hlist_empty(&tb->owners))

to

if (!hlist_empty(&tb->owners))

This is obviously bad as all of the reuseport/reuse logic was reversed,
which caused weird problems like allowing an ipv4 bind conflict if we
opened an ipv4 only socket on a port followed by an ipv6 only socket on
the same port.

Fixes: b9470c2760 ("inet: kill smallest_size and smallest_port")
Reported-by: Cole Robinson <crobinso@redhat.com>
Signed-off-by: Josef Bacik <jbacik@fb.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Josef Bacik 2017-09-22 20:20:08 -04:00 committed by David S. Miller
parent 7a56673b58
commit fbed24bcc6
1 changed files with 1 additions and 1 deletions
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2
net/ipv4/inet_connection_sock.c
View File

@ -321,7 +321,7 @@ int inet_csk_get_port(struct sock *sk, unsigned short snum)
goto fail_unlock;
}
success:
if (!hlist_empty(&tb->owners)) {
if (hlist_empty(&tb->owners)) {
tb->fastreuse = reuse;
if (sk->sk_reuseport) {
tb->fastreuseport = FASTREUSEPORT_ANY;