From: Maxime Coquelin <maxime.coquelin@redhat.com>
Date: Fri, 26 Jun 2020 14:04:29 +0000 (+0200)
Subject: bus/fslmc: fix iterating on a class type
X-Git-Url: http://git.droids-corp.org/?a=commitdiff_plain;h=44255245433b3b4394474db100d478341aeb08fc;p=dpdk.git

bus/fslmc: 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: e67a61614d0b ("bus/fslmc: support device iteration")
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/fslmc/fslmc_bus.c b/drivers/bus/fslmc/fslmc_bus.c
index afbd82e8db..ac46eb4fe8 100644
--- a/drivers/bus/fslmc/fslmc_bus.c
+++ b/drivers/bus/fslmc/fslmc_bus.c
@@ -603,6 +603,11 @@ fslmc_bus_dev_iterate(const void *start, const char *str,
 	struct rte_dpaa2_device *dev;
 	char *dup, *dev_name = NULL;
 
+	if (str == NULL) {
+		DPAA2_BUS_DEBUG("No device string");
+		return NULL;
+	}
+
 	/* Expectation is that device would be name=device_name */
 	if (strncmp(str, "name=", 5) != 0) {
 		DPAA2_BUS_DEBUG("Invalid device string (%s)\n", str);