[PULL 21/26] migration/multifd: Fix leaking of Error in TLS error flow

[peterx@redhat.com]

From: Avihai Horon <avihaih@nvidia.com>

If there is an error in multifd TLS handshake task,
multifd_tls_outgoing_handshake() retrieves the error with
qio_task_propagate_error() but never frees it.

Fix it by freeing the obtained Error.

In addition, the error is not reported at all, so report it with
migrate_set_error().

Fixes: 29647140157a ("migration/tls: add support for multifd tls-handshake")
Signed-off-by: Avihai Horon <avihaih@nvidia.com>
Reviewed-by: Fabiano Rosas <farosas@suse.de>
Link: https://lore.kernel.org/r/20231231093016.14204-8-avihaih@nvidia.com
Signed-off-by: Peter Xu <peterx@redhat.com>
---
 migration/multifd.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/migration/multifd.c b/migration/multifd.c
index 55d5fd55f8..9ac24866ad 100644
--- a/migration/multifd.c
+++ b/migration/multifd.c
@@ -787,6 +787,7 @@ static void multifd_tls_outgoing_handshake(QIOTask *task,
 
     trace_multifd_tls_outgoing_handshake_error(ioc, error_get_pretty(err));
 
+    migrate_set_error(migrate_get_current(), err);
     /*
      * Error happen, mark multifd_send_thread status as 'quit' although it
      * is not created, and then tell who pay attention to me.
@@ -794,6 +795,7 @@ static void multifd_tls_outgoing_handshake(QIOTask *task,
     p->quit = true;
     qemu_sem_post(&multifd_send_state->channels_ready);
     qemu_sem_post(&p->sem_sync);
+    error_free(err);
 }
 
 static void *multifd_tls_handshake_thread(void *opaque)
-- 
2.41.0