From: Oleg Sviridov <oleg.sviri...@red-soft.ru>
Pointer, returned from function 'spapr_vio_find_by_reg',
may be NULL and is dereferenced immediately after.
Found by Linux Verification Center (linuxtesting.org) with SVACE.
Signed-off-by: Oleg Sviridov <oleg.sviri...@red-soft.ru>
Message-ID: <20240531073636.3779559-1-oleg.sviri...@red-soft.ru>
Signed-off-by: Philippe Mathieu-Daudé <phi...@linaro.org>
---
hw/net/spapr_llan.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/hw/net/spapr_llan.c b/hw/net/spapr_llan.c
index ecb30b7c76..8af33d91b6 100644
--- a/hw/net/spapr_llan.c
+++ b/hw/net/spapr_llan.c
@@ -770,6 +770,12 @@ static target_ulong h_change_logical_lan_mac(PowerPCCPU
*cpu,
SpaprVioVlan *dev = VIO_SPAPR_VLAN_DEVICE(sdev);
int i;
+ if (!dev) {
+ hcall_dprintf("H_CHANGE_LOGICAL_LAN_MAC called when "
+ "no NIC is present\n");
+ return H_PARAMETER;
+ }
+
for (i = 0; i < ETH_ALEN; i++) {
dev->nicconf.macaddr.a[ETH_ALEN - i - 1] = macaddr & 0xff;
macaddr >>= 8;
--
2.41.0
