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| author |   Eric Dumazet <edumazet@google.com> | 2015-10-23 10:59:16 -0700 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2015-10-25 06:37:45 -0700 |
| commit | 1586a5877db9eee313379738d6581bc7c6ffb5e3 (patch) | |
| tree | 67dfe980f1ce3a826883360f51babeabdb73c820 /net/unix | |
| parent | tipc: link_is_bc_sndlink() can be static (diff) | |
| download | linux-dev-1586a5877db9eee313379738d6581bc7c6ffb5e3.tar.xz linux-dev-1586a5877db9eee313379738d6581bc7c6ffb5e3.zip | |
af_unix: do not report POLLOUT on listeners
poll(POLLOUT) on a listener should not report fd is ready for
a write().
This would break some applications using poll() and pfd.events = -1,
as they would not block in poll()
Signed-off-by: Eric Dumazet <edumazet@google.com>
Reported-by: Alan Burlison <Alan.Burlison@oracle.com>
Tested-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/unix')
| -rw-r--r-- | net/unix/af_unix.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/net/unix/af_unix.c b/net/unix/af_unix.c index 94f658235fb4..aaa0b58d6aba 100644 --- a/net/unix/af_unix.c +++ b/net/unix/af_unix.c @@ -326,9 +326,10 @@ found: return s; } -static inline int unix_writable(struct sock *sk) +static int unix_writable(const struct sock *sk) { - return (atomic_read(&sk->sk_wmem_alloc) << 2) <= sk->sk_sndbuf; + return sk->sk_state != TCP_LISTEN && + (atomic_read(&sk->sk_wmem_alloc) << 2) <= sk->sk_sndbuf; } static void unix_write_space(struct sock *sk) |