From: Maxime Coquelin <maxime.coquelin@redhat.com>
Date: Fri, 26 Jun 2020 14:04:28 +0000 (+0200)
Subject: bus/dpaa: fix iterating on a class type
X-Git-Url: http://git.droids-corp.org/?p=dpdk.git;a=commitdiff_plain;h=be2ee360fe86cf041d1a07577919160e6557c679

bus/dpaa: fix iterating on a class type

This patches fixes a null pointer dereferencing that happens
when the device string passed to the iterator is NULL. This
situation can happen when iterating on a class type.
For example:

RTE_DEV_FOREACH(dev, "class=eth", &dev_iter) {
    ...
}

Fixes: e79df833d3f6 ("bus/dpaa: support hotplug ops")
Cc: stable@dpdk.org

Signed-off-by: Maxime Coquelin <maxime.coquelin@redhat.com>
Acked-by: Adrián Moreno <amorenoz@redhat.com>
---

diff --git a/drivers/bus/dpaa/dpaa_bus.c b/drivers/bus/dpaa/dpaa_bus.c
index d53fe6083a..591e28c1e7 100644
--- a/drivers/bus/dpaa/dpaa_bus.c
+++ b/drivers/bus/dpaa/dpaa_bus.c
@@ -703,6 +703,11 @@ dpaa_bus_dev_iterate(const void *start, const char *str,
 	struct rte_dpaa_device *dev;
 	char *dup, *dev_name = NULL;
 
+	if (str == NULL) {
+		DPAA_BUS_DEBUG("No device string");
+		return NULL;
+	}
+
 	/* Expectation is that device would be name=device_name */
 	if (strncmp(str, "name=", 5) != 0) {
 		DPAA_BUS_DEBUG("Invalid device string (%s)\n", str);