vnc: fix memleak of the "vnc-worker-output" name

Fixes repeated memory leaks of 18 bytes when using VNC:

    Direct leak of 831024 byte(s) in 46168 object(s) allocated from:
        ...
        #4 0x7f6d2f919bdd in g_strdup_vprintf glib/gstrfuncs.c:514
        #5 0x56085cdcf660 in buffer_init util/buffer.c:59
        #6 0x56085ca6a7ec in vnc_async_encoding_start ui/vnc-jobs.c:177
        #7 0x56085ca6b815 in vnc_worker_thread_loop ui/vnc-jobs.c:240

Fixes: 543b95801f98 ("vnc: attach names to buffers")
Cc: Gerd Hoffmann <kraxel@redhat.com>
CC: qemu-stable@nongnu.org
Signed-off-by: Peter Wu <peter@lekensteyn.nl>
Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-id: 20180807221830.3844-1-peter@lekensteyn.nl
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
(cherry picked from commit 0ae0b069aa8f23a138cc6d2d83edaa5c22f948a5)
Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>

diff --git a/ui/vnc-jobs.c b/ui/vnc-jobs.c
index b0b15d42a8760f92880d2c5be08b2405422e8a1a..929391f85d693fd7da3af2514b75db4e8c798f87 100644 (file)
--- a/ui/vnc-jobs.c
+++ b/ui/vnc-jobs.c
@@ -193,6 +193,7 @@ static void vnc_async_encoding_start(VncState *orig, VncState *local)
 
 static void vnc_async_encoding_end(VncState *orig, VncState *local)
 {
+    buffer_free(&local->output);
     orig->tight = local->tight;
     orig->zlib = local->zlib;
     orig->hextile = local->hextile;
@@ -278,7 +279,7 @@ static int vnc_worker_thread_loop(VncJobQueue *queue)
         /* Copy persistent encoding data */
         vnc_async_encoding_end(job->vs, &vs);
 
-       qemu_bh_schedule(job->vs->bh);
+        qemu_bh_schedule(job->vs->bh);
     }  else {
         buffer_reset(&vs.output);
         /* Copy persistent encoding data */