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Cygwin: AF_UNIX: fix SEGV when sending an empty socket name from connect 

Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
This commit is contained in:
Corinna Vinschen 2018-03-07 16:08:15 +01:00
parent 2f2a75b7bb
commit 4de52a0fe1
1 changed files with 5 additions and 2 deletions
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7
winsup/cygwin/fhandler_socket_unix.cc
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@ -540,15 +540,18 @@ fhandler_socket_unix::set_pipe_non_blocking (bool nonblocking)
int
fhandler_socket_unix::send_my_name ()
{
sun_name_t *sun;
size_t name_len = 0;
af_unix_pkt_hdr_t *packet;
NTSTATUS status;
IO_STATUS_BLOCK io;
AcquireSRWLockShared (&bind_lock);
name_len = get_sun_path ()->un_len;
sun = get_sun_path ();
name_len = sun ? sun->un_len : 0;
packet = (af_unix_pkt_hdr_t *) alloca (sizeof *packet + name_len);
memcpy (AF_UNIX_PKT_NAME (packet), &get_sun_path ()->un, name_len);
if (sun)
memcpy (AF_UNIX_PKT_NAME (packet), &sun->un, name_len);
ReleaseSRWLockShared (&bind_lock);
packet->init (0, name_len, 0, 0);