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[v2,02/14] bus/fslmc: fix null pointer dereference

Message ID 20200624122701.1369327-3-maxime.coquelin@redhat.com (mailing list archive)
State Superseded, archived
Delegated to: Maxime Coquelin
Headers show
Series vDPA API and framework rework | expand


Context Check Description
ci/checkpatch success coding style OK

Commit Message

Maxime Coquelin June 24, 2020, 12:26 p.m. UTC
This patches fixes a null pointer derefencing 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
Cc: shreyansh.jain@nxp.com

Signed-off-by: Maxime Coquelin <maxime.coquelin@redhat.com>
 drivers/bus/fslmc/fslmc_bus.c | 5 +++++
 1 file changed, 5 insertions(+)
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diff --git a/drivers/bus/fslmc/fslmc_bus.c b/drivers/bus/fslmc/fslmc_bus.c
index afbd82e8db..75c15d6b67 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\n");
+		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);