diff options
| author | Eric W. Biederman <ebiederm@xmission.com> | 2013-04-03 16:13:35 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2013-04-05 00:49:03 -0400 |
| commit | 25da0e3e9d3fb2b522bc2a598076735850310eb1 (patch) | |
| tree | d44a992a5e27df77cec69dd0ce19272498e402f0 /net | |
| parent | 4de79c737b200492195ebc54a887075327e1ec1d (diff) | |
| download | lwn-25da0e3e9d3fb2b522bc2a598076735850310eb1.tar.gz lwn-25da0e3e9d3fb2b522bc2a598076735850310eb1.zip | |
Revert "af_unix: dont send SCM_CREDENTIAL when dest socket is NULL"
This reverts commit 14134f6584212d585b310ce95428014b653dfaf6.
The problem that the above patch was meant to address is that af_unix
messages are not being coallesced because we are sending unnecesarry
credentials. Not sending credentials in maybe_add_creds totally
breaks unconnected unix domain sockets that wish to send credentails
to other sockets.
In practice this break some versions of udev because they receive a
message and the sending uid is bogus so they drop the message.
Reported-by: Sven Joachim <svenjoac@gmx.de>
Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
| -rw-r--r-- | net/unix/af_unix.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/net/unix/af_unix.c b/net/unix/af_unix.c index 971282b6f6a3..f153a8d6e339 100644 --- a/net/unix/af_unix.c +++ b/net/unix/af_unix.c @@ -1412,8 +1412,8 @@ static void maybe_add_creds(struct sk_buff *skb, const struct socket *sock, if (UNIXCB(skb).cred) return; if (test_bit(SOCK_PASSCRED, &sock->flags) || - (other->sk_socket && - test_bit(SOCK_PASSCRED, &other->sk_socket->flags))) { + !other->sk_socket || + test_bit(SOCK_PASSCRED, &other->sk_socket->flags)) { UNIXCB(skb).pid = get_pid(task_tgid(current)); UNIXCB(skb).cred = get_current_cred(); } |