From 34c721fb47155135bf2173ca7b9a31aaacfde190 Mon Sep 17 00:00:00 2001 From: Steven Luong Date: Thu, 5 Oct 2023 15:33:40 -0700 Subject: memif: contention between memif_disconnect and memif RX/TX threads memif_disconect may be called without barrier sync. It removes stuff in mq without protection which may cause troubles for memif RX/TX worker threads. The fix is to protect mq removal in memif_disconnect. Type: fix Change-Id: I368c466d1f13df98980dfa87e8442fbcd822a428 Signed-off-by: Steven Luong --- src/plugins/memif/memif.c | 11 +++++++++++ 1 file changed, 11 insertions(+) (limited to 'src/plugins') diff --git a/src/plugins/memif/memif.c b/src/plugins/memif/memif.c index 37028d8223e..22f3e3dcdf1 100644 --- a/src/plugins/memif/memif.c +++ b/src/plugins/memif/memif.c @@ -100,6 +100,8 @@ memif_disconnect (memif_if_t * mif, clib_error_t * err) memif_region_t *mr; memif_queue_t *mq; int i; + vlib_main_t *vm = vlib_get_main (); + int with_barrier = 0; if (mif == 0) return; @@ -141,6 +143,12 @@ memif_disconnect (memif_if_t * mif, clib_error_t * err) clib_mem_free (mif->sock); } + if (vlib_worker_thread_barrier_held () == 0) + { + with_barrier = 1; + vlib_worker_thread_barrier_sync (vm); + } + /* *INDENT-OFF* */ vec_foreach_index (i, mif->rx_queues) { @@ -198,6 +206,9 @@ memif_disconnect (memif_if_t * mif, clib_error_t * err) vec_free (mif->remote_name); vec_free (mif->remote_if_name); clib_fifo_free (mif->msg_queue); + + if (with_barrier) + vlib_worker_thread_barrier_release (vm); } static clib_error_t * -- cgit 1.2.3-korg