Currently it is possible to call netdev-dpdk/get-mempool-info before a
mempool as been created. This can happen because a device is added to
the netdev_shash before a mempool is allocated for it, which results in
a segmentation fault.
Now we check for a NULL value before attempting to dereference it.
Fixes: be4817331071 ("netdev-dpdk: Add debug appctl to get mempool
information.")
Signed-off-by: Mike Pattrick <[email protected]>
---
v2: Added a test for this issue.
---
lib/netdev-dpdk.c | 12 ++++++++----
tests/system-dpdk.at | 5 +++++
2 files changed, 13 insertions(+), 4 deletions(-)
diff --git a/lib/netdev-dpdk.c b/lib/netdev-dpdk.c
index 02cef6e45..6afa6da88 100644
--- a/lib/netdev-dpdk.c
+++ b/lib/netdev-dpdk.c
@@ -4664,10 +4664,14 @@ netdev_dpdk_get_mempool_info(struct unixctl_conn *conn,
ovs_mutex_lock(&dev->mutex);
ovs_mutex_lock(&dpdk_mp_mutex);
- rte_mempool_dump(stream, dev->dpdk_mp->mp);
- fprintf(stream, " count: avail (%u), in use (%u)\n",
- rte_mempool_avail_count(dev->dpdk_mp->mp),
- rte_mempool_in_use_count(dev->dpdk_mp->mp));
+ if (dev->dpdk_mp) {
+ rte_mempool_dump(stream, dev->dpdk_mp->mp);
+ fprintf(stream, " count: avail (%u), in use (%u)\n",
+ rte_mempool_avail_count(dev->dpdk_mp->mp),
+ rte_mempool_in_use_count(dev->dpdk_mp->mp));
+ } else {
+ fprintf(stream, " Not allocated\n");
+ }
ovs_mutex_unlock(&dpdk_mp_mutex);
ovs_mutex_unlock(&dev->mutex);
diff --git a/tests/system-dpdk.at b/tests/system-dpdk.at
index 1c97bf777..ecf4c7496 100644
--- a/tests/system-dpdk.at
+++ b/tests/system-dpdk.at
@@ -88,6 +88,11 @@ ADD_VHOST_USER_CLIENT_PORT([br10], [dpdkvhostuserclient0],
[$OVS_RUNDIR/dpdkvhos
AT_CHECK([ovs-vsctl show], [], [stdout])
sleep 2
+dnl Check that no mempool was allocated.
+AT_CHECK([ovs-appctl netdev-dpdk/get-mempool-info dpdkvhostuserclient0], [0],
[dnl
+ Not allocated
+])
+
dnl Clean up
AT_CHECK([ovs-vsctl del-port br10 dpdkvhostuserclient0], [], [stdout],
[stderr])
OVS_DPDK_STOP_VSWITCHD(["dnl
--
2.39.3
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