mwifiex: fix null derefs, mem leaks and trivia
This patch:
- adds kfree() where necessary
- prevents potential null dereferences
- makes use of kfree_skb()
- replaces -1 for failed kzallocs with -ENOMEM
Signed-off-by: Christoph Fritz <chf.fritz@googlemail.com>
Reviewed-by: Kiran Divekar <dkiran@marvell.com>
Tested-by: Amitkumar Karwar <akarwar@marvell.com>
Acked-by: Bing Zhao <bzhao@marvell.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/mwifiex/11n_aggr.c b/drivers/net/wireless/mwifiex/11n_aggr.c
index 12cf424..2b2cca5 100644
--- a/drivers/net/wireless/mwifiex/11n_aggr.c
+++ b/drivers/net/wireless/mwifiex/11n_aggr.c
@@ -318,7 +318,8 @@
else
skb_src = NULL;
- pra_list->total_pkts_size -= skb_src->len;
+ if (skb_src)
+ pra_list->total_pkts_size -= skb_src->len;
spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock,
ra_list_flags);
@@ -373,7 +374,8 @@
(adapter->pps_uapsd_mode) &&
(adapter->tx_lock_flag)) {
priv->adapter->tx_lock_flag = false;
- ptx_pd->flags = 0;
+ if (ptx_pd)
+ ptx_pd->flags = 0;
}
skb_queue_tail(&pra_list->skb_head, skb_aggr);
diff --git a/drivers/net/wireless/mwifiex/cfg80211.c b/drivers/net/wireless/mwifiex/cfg80211.c
index 0c01163..19be887 100644
--- a/drivers/net/wireless/mwifiex/cfg80211.c
+++ b/drivers/net/wireless/mwifiex/cfg80211.c
@@ -1255,8 +1255,10 @@
wdev->wiphy =
wiphy_new(&mwifiex_cfg80211_ops,
sizeof(struct mwifiex_private *));
- if (!wdev->wiphy)
+ if (!wdev->wiphy) {
+ kfree(wdev);
return -ENOMEM;
+ }
wdev->iftype = NL80211_IFTYPE_STATION;
wdev->wiphy->max_scan_ssids = 10;
wdev->wiphy->interface_modes =
@@ -1296,6 +1298,7 @@
dev_err(priv->adapter->dev, "%s: registering cfg80211 device\n",
__func__);
wiphy_free(wdev->wiphy);
+ kfree(wdev);
return ret;
} else {
dev_dbg(priv->adapter->dev,
diff --git a/drivers/net/wireless/mwifiex/cmdevt.c b/drivers/net/wireless/mwifiex/cmdevt.c
index b75cc92..1c8b4f7 100644
--- a/drivers/net/wireless/mwifiex/cmdevt.c
+++ b/drivers/net/wireless/mwifiex/cmdevt.c
@@ -292,7 +292,7 @@
if (!cmd_array) {
dev_err(adapter->dev, "%s: failed to alloc cmd_array\n",
__func__);
- return -1;
+ return -ENOMEM;
}
adapter->cmd_pool = cmd_array;
diff --git a/drivers/net/wireless/mwifiex/init.c b/drivers/net/wireless/mwifiex/init.c
index 27ad72b..6a8fd99 100644
--- a/drivers/net/wireless/mwifiex/init.c
+++ b/drivers/net/wireless/mwifiex/init.c
@@ -41,7 +41,7 @@
if (!bss_prio) {
dev_err(adapter->dev, "%s: failed to alloc bss_prio\n",
__func__);
- return -1;
+ return -ENOMEM;
}
bss_prio->priv = priv;
@@ -161,7 +161,7 @@
if (!temp_scan_table) {
dev_err(adapter->dev, "%s: failed to alloc temp_scan_table\n",
__func__);
- return -1;
+ return -ENOMEM;
}
adapter->scan_table = temp_scan_table;
diff --git a/drivers/net/wireless/mwifiex/main.c b/drivers/net/wireless/mwifiex/main.c
index 38f912b..44957ca 100644
--- a/drivers/net/wireless/mwifiex/main.c
+++ b/drivers/net/wireless/mwifiex/main.c
@@ -69,7 +69,7 @@
adapter = kzalloc(sizeof(struct mwifiex_adapter), GFP_KERNEL);
if (!adapter)
- return -1;
+ return -ENOMEM;
g_adapter = adapter;
adapter->card = card;
@@ -516,13 +516,13 @@
jiffies, priv->bss_index);
if (priv->adapter->surprise_removed) {
- kfree(skb);
+ kfree_skb(skb);
priv->stats.tx_dropped++;
return 0;
}
if (!skb->len || (skb->len > ETH_FRAME_LEN)) {
dev_err(priv->adapter->dev, "Tx: bad skb len %d\n", skb->len);
- kfree(skb);
+ kfree_skb(skb);
priv->stats.tx_dropped++;
return 0;
}
@@ -535,7 +535,7 @@
skb_realloc_headroom(skb, MWIFIEX_MIN_DATA_HEADER_LEN);
if (unlikely(!new_skb)) {
dev_err(priv->adapter->dev, "Tx: cannot alloca new_skb\n");
- kfree(skb);
+ kfree_skb(skb);
priv->stats.tx_dropped++;
return 0;
}
diff --git a/drivers/net/wireless/mwifiex/scan.c b/drivers/net/wireless/mwifiex/scan.c
index 4968974..5c22860 100644
--- a/drivers/net/wireless/mwifiex/scan.c
+++ b/drivers/net/wireless/mwifiex/scan.c
@@ -2283,7 +2283,7 @@
GFP_KERNEL);
if (!scan_cfg_out) {
dev_err(adapter->dev, "failed to alloc scan_cfg_out\n");
- return -1;
+ return -ENOMEM;
}
buf_size = sizeof(struct mwifiex_chan_scan_param_set) *
@@ -2292,7 +2292,7 @@
if (!scan_chan_list) {
dev_err(adapter->dev, "failed to alloc scan_chan_list\n");
kfree(scan_cfg_out);
- return -1;
+ return -ENOMEM;
}
keep_previous_scan = false;
@@ -2491,7 +2491,7 @@
GFP_KERNEL);
if (!bss_new_entry) {
dev_err(adapter->dev, " failed to alloc bss_new_entry\n");
- return -1;
+ return -ENOMEM;
}
for (idx = 0; idx < scan_rsp->number_of_sets && bytes_left; idx++) {
@@ -2881,7 +2881,7 @@
scan_cfg = kzalloc(sizeof(struct mwifiex_user_scan_cfg), GFP_KERNEL);
if (!scan_cfg) {
dev_err(adapter->dev, "failed to alloc scan_cfg\n");
- return -1;
+ return -ENOMEM;
}
memcpy(scan_cfg->ssid_list[0].ssid, req_ssid->ssid,
diff --git a/drivers/net/wireless/mwifiex/sdio.c b/drivers/net/wireless/mwifiex/sdio.c
index 470dbaa..d425dbd 100644
--- a/drivers/net/wireless/mwifiex/sdio.c
+++ b/drivers/net/wireless/mwifiex/sdio.c
@@ -68,6 +68,7 @@
if (ret) {
pr_err("%s: failed to enable function\n", __func__);
+ kfree(card);
return -EIO;
}
@@ -676,7 +677,7 @@
if (!fwbuf) {
dev_err(adapter->dev, "unable to alloc buffer for firmware."
" Terminating download\n");
- return -1;
+ return -ENOMEM;
}
/* Perform firmware data transfer */
@@ -1605,7 +1606,7 @@
card->mp_regs = kzalloc(MAX_MP_REGS, GFP_KERNEL);
if (!card->mp_regs) {
dev_err(adapter->dev, "failed to alloc mp_regs\n");
- return -1;
+ return -ENOMEM;
}
ret = mwifiex_alloc_sdio_mpa_buffers(adapter,
diff --git a/drivers/net/wireless/mwifiex/sta_ioctl.c b/drivers/net/wireless/mwifiex/sta_ioctl.c
index 4585c1b..75bca56 100644
--- a/drivers/net/wireless/mwifiex/sta_ioctl.c
+++ b/drivers/net/wireless/mwifiex/sta_ioctl.c
@@ -895,7 +895,7 @@
if (!buf) {
dev_err(priv->adapter->dev, "%s: failed to alloc cmd buffer\n",
__func__);
- return -1;
+ return -ENOMEM;
}
txp_cfg = (struct host_cmd_ds_txpwr_cfg *) buf;