wl12xx: Validate FEM index from ini file and FW

Check for out of bound FEM index to prevent reading beyond ini
memory end.

Signed-off-by: Pontus Fuchs <pontus.fuchs@gmail.com>
Cc: stable@kernel.org
Reviewed-by: Luciano Coelho <coelho@ti.com>
Signed-off-by: Luciano Coelho <coelho@ti.com>

1 files changed, 22 insertions, 0 deletions

diff --git a/drivers/net/wireless/wl12xx/cmd.c b/drivers/net/wireless/wl12xx/cmd.c
index afd597387e7..e0d21797948 100644
--- a/drivers/net/wireless/wl12xx/cmd.c
+++ b/drivers/net/wireless/wl12xx/cmd.c
@@ -121,6 +121,11 @@ int wl1271_cmd_general_parms(struct wl1271 *wl)
         if (!wl->nvs)
                 return -ENODEV;
 
+        if (gp->tx_bip_fem_manufacturer >= WL1271_INI_FEM_MODULE_COUNT) {
+                wl1271_warning("FEM index from INI out of bounds");
+                return -EINVAL;
+        }
+
         gen_parms = kzalloc(sizeof(*gen_parms), GFP_KERNEL);
         if (!gen_parms)
                 return -ENOMEM;
@@ -144,6 +149,12 @@ int wl1271_cmd_general_parms(struct wl1271 *wl)
         gp->tx_bip_fem_manufacturer =
                 gen_parms->general_params.tx_bip_fem_manufacturer;
 
+        if (gp->tx_bip_fem_manufacturer >= WL1271_INI_FEM_MODULE_COUNT) {
+                wl1271_warning("FEM index from FW out of bounds");
+                ret = -EINVAL;
+                goto out;
+        }
+
         wl1271_debug(DEBUG_CMD, "FEM autodetect: %s, manufacturer: %d\n",
                      answer ? "auto" : "manual", gp->tx_bip_fem_manufacturer);
 
@@ -163,6 +174,11 @@ int wl128x_cmd_general_parms(struct wl1271 *wl)
         if (!wl->nvs)
                 return -ENODEV;
 
+        if (gp->tx_bip_fem_manufacturer >= WL1271_INI_FEM_MODULE_COUNT) {
+                wl1271_warning("FEM index from ini out of bounds");
+                return -EINVAL;
+        }
+
         gen_parms = kzalloc(sizeof(*gen_parms), GFP_KERNEL);
         if (!gen_parms)
                 return -ENOMEM;
@@ -187,6 +203,12 @@ int wl128x_cmd_general_parms(struct wl1271 *wl)
         gp->tx_bip_fem_manufacturer =
                 gen_parms->general_params.tx_bip_fem_manufacturer;
 
+        if (gp->tx_bip_fem_manufacturer >= WL1271_INI_FEM_MODULE_COUNT) {
+                wl1271_warning("FEM index from FW out of bounds");
+                ret = -EINVAL;
+                goto out;
+        }
+
         wl1271_debug(DEBUG_CMD, "FEM autodetect: %s, manufacturer: %d\n",
                      answer ? "auto" : "manual", gp->tx_bip_fem_manufacturer);