[dpdk-dev] [PATCH v3 2/5] examples/vhost_scsi: fix missing NULL-check for parameter

[Bruce Richardson <bruce.richardson@intel.com>]

Coverity points out that there is a check in the main thread loop for the
ctrlr->bdev being NULL, but by that stage the pointer has already been
dereferenced. Therefore, for safety, before we enter the loop do an
initial check on the parameter structure.

Coverity issue: 158657
Fixes: db75c7af19bb ("examples/vhost_scsi: introduce a new sample app")
CC: stable@dpdk.org
CC: Maxime Coquelin <maxime.coquelin@redhat.com>
CC: Tiwei Bie <tiwei.bie@intel.com>
CC: Zhihong Wang <zhihong.wang@intel.com>

Signed-off-by: Bruce Richardson <bruce.richardson@intel.com>
---
 examples/vhost_scsi/vhost_scsi.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/examples/vhost_scsi/vhost_scsi.c b/examples/vhost_scsi/vhost_scsi.c
index 2908ff68b..513af0cca 100644
--- a/examples/vhost_scsi/vhost_scsi.c
+++ b/examples/vhost_scsi/vhost_scsi.c
@@ -285,6 +285,12 @@ ctrlr_worker(void *arg)
 	cpu_set_t cpuset;
 	pthread_t thread;
 
+	if (ctrlr == NULL || ctrlr->bdev == NULL) {
+		fprintf(stderr, "%s: Error, invalid argument passed to worker thread\n",
+				__func__);
+		exit(0);
+	}
+
 	thread = pthread_self();
 	CPU_ZERO(&cpuset);
 	CPU_SET(0, &cpuset);
-- 
2.20.1