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io: Fix qio_channel_socket_close() error handling 

The Error ** argument must be NULL, &error_abort, &error_fatal, or a
pointer to a variable containing NULL.  Passing an argument of the
latter kind twice without clearing it in between is wrong: if the
first call sets an error, it no longer points to NULL for the second
call.

qio_channel_socket_close() passes @errp first to
socket_listen_cleanup(), and then, if closesocket() fails, to
error_setg_errno().  If socket_listen_cleanup() failed, this will trip
the assertion in error_setv().

Fix by ignoring a second error.

Fixes: 73564c407c
Cc: Daniel P. Berrangé <berrange@redhat.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Message-Id: <20200422130719.28225-11-armbru@redhat.com>
This commit is contained in:
Markus Armbruster 2020-04-22 15:07:15 +02:00
parent c61d1d9e49
commit fdceb4ab4d
1 changed files with 3 additions and 2 deletions
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5
io/channel-socket.c
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@ -704,6 +704,7 @@ qio_channel_socket_close(QIOChannel *ioc,
{
QIOChannelSocket *sioc = QIO_CHANNEL_SOCKET(ioc);
int rc = 0;
Error *err = NULL;
if (sioc->fd != -1) {
#ifdef WIN32
@ -715,8 +716,8 @@ qio_channel_socket_close(QIOChannel *ioc,
if (closesocket(sioc->fd) < 0) {
sioc->fd = -1;
error_setg_errno(errp, errno,
"Unable to close socket");
error_setg_errno(&err, errno, "Unable to close socket");
error_propagate(errp, err);
return -1;
}
sioc->fd = -1;