[PATCH 1/1] firmware: smci: possible NULL dereference

[Heinrich Schuchardt]

sandbox_scmi_devices_ctx() may return NULL. We should not dereference this
value in sandbox_scmi_devices_remove().

The problem was indicated by 'gcc-11 -fanalyzer'.

Signed-off-by: Heinrich Schuchardt <xypron.glpk at gmx.de>
---
 drivers/firmware/scmi/sandbox-scmi_devices.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/firmware/scmi/sandbox-scmi_devices.c b/drivers/firmware/scmi/sandbox-scmi_devices.c
index 414da6f4df..1a6fafbf53 100644
--- a/drivers/firmware/scmi/sandbox-scmi_devices.c
+++ b/drivers/firmware/scmi/sandbox-scmi_devices.c
@@ -50,6 +50,9 @@ static int sandbox_scmi_devices_remove(struct udevice *dev)
 	int ret = 0;
 	size_t n;

+	if (!devices)
+		return 0;
+
 	for (n = 0; n < SCMI_TEST_DEVICES_RD_COUNT; n++) {
 		int ret2 = reset_free(devices->reset + n);

--
2.29.2