diff options
| author | Larry Finger <Larry.Finger@lwfinger.net> | 2012-01-07 20:46:40 -0600 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2012-04-02 10:31:42 -0700 |
| commit | b41c92b278bca642b12be17e4e01359dfd84dec5 (patch) | |
| tree | 0e8bddb7cd8bb660f2ec28d417e990124dbf1ea3 | |
| parent | 9702690fb8cbb98b3a590d15a6d7111f0e822fde (diff) | |
rtlwifi: rtl8192c_common: rtl8192de: Check for allocation failures
commit 76a92be537f1c8c259e393632301446257ca3ea9 upstream.
In https://bugzilla.redhat.com/show_bug.cgi?id=771656, a kernel bug was
triggered due to a failed skb allocation that was not checked. This event
lead to an audit of all memory allocations in the complete rtlwifi family
of drivers. This patch fixes the rest.
Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/net/wireless/rtlwifi/pci.c | 2 | ||||
| -rw-r--r-- | drivers/net/wireless/rtlwifi/rtl8192c/fw_common.c | 2 | ||||
| -rw-r--r-- | drivers/net/wireless/rtlwifi/rtl8192de/fw.c | 14 | ||||
| -rw-r--r-- | drivers/net/wireless/rtlwifi/usb.c | 12 |
4 files changed, 20 insertions, 10 deletions
diff --git a/drivers/net/wireless/rtlwifi/pci.c b/drivers/net/wireless/rtlwifi/pci.c index 9245d882c06..9ec2c46297e 100644 --- a/drivers/net/wireless/rtlwifi/pci.c +++ b/drivers/net/wireless/rtlwifi/pci.c @@ -657,6 +657,8 @@ static void _rtl_receive_one(struct ieee80211_hw *hw, struct sk_buff *skb, return; uskb = dev_alloc_skb(skb->len + 128); + if (!uskb) + return; /* exit if allocation failed */ memcpy(IEEE80211_SKB_RXCB(uskb), &rx_status, sizeof(rx_status)); pdata = (u8 *)skb_put(uskb, skb->len); memcpy(pdata, skb->data, skb->len); diff --git a/drivers/net/wireless/rtlwifi/rtl8192c/fw_common.c b/drivers/net/wireless/rtlwifi/rtl8192c/fw_common.c index 931d97979b0..d2ed6a36845 100644 --- a/drivers/net/wireless/rtlwifi/rtl8192c/fw_common.c +++ b/drivers/net/wireless/rtlwifi/rtl8192c/fw_common.c @@ -788,6 +788,8 @@ void rtl92c_set_fw_rsvdpagepkt(struct ieee80211_hw *hw, bool dl_finished) skb = dev_alloc_skb(totalpacketlen); + if (!skb) + return; memcpy((u8 *) skb_put(skb, totalpacketlen), &reserved_page_packet, totalpacketlen); diff --git a/drivers/net/wireless/rtlwifi/rtl8192de/fw.c b/drivers/net/wireless/rtlwifi/rtl8192de/fw.c index 82f060bdbc0..c44757f3138 100644 --- a/drivers/net/wireless/rtlwifi/rtl8192de/fw.c +++ b/drivers/net/wireless/rtlwifi/rtl8192de/fw.c @@ -763,12 +763,16 @@ void rtl92d_set_fw_rsvdpagepkt(struct ieee80211_hw *hw, bool dl_finished) "rtl92d_set_fw_rsvdpagepkt(): HW_VAR_SET_TX_CMD: ALL\n", u1RsvdPageLoc, 3); skb = dev_alloc_skb(totalpacketlen); - memcpy((u8 *) skb_put(skb, totalpacketlen), &reserved_page_packet, - totalpacketlen); - rtstatus = _rtl92d_cmd_send_packet(hw, skb); + if (!skb) { + dlok = false; + } else { + memcpy((u8 *) skb_put(skb, totalpacketlen), + &reserved_page_packet, totalpacketlen); + rtstatus = _rtl92d_cmd_send_packet(hw, skb); - if (rtstatus) - dlok = true; + if (rtstatus) + dlok = true; + } if (dlok) { RT_TRACE(rtlpriv, COMP_POWER, DBG_LOUD, ("Set RSVD page location to Fw.\n")); diff --git a/drivers/net/wireless/rtlwifi/usb.c b/drivers/net/wireless/rtlwifi/usb.c index e956fa71d04..5d3a789876d 100644 --- a/drivers/net/wireless/rtlwifi/usb.c +++ b/drivers/net/wireless/rtlwifi/usb.c @@ -520,12 +520,14 @@ static void _rtl_usb_rx_process_noagg(struct ieee80211_hw *hw, u8 *pdata; uskb = dev_alloc_skb(skb->len + 128); - memcpy(IEEE80211_SKB_RXCB(uskb), &rx_status, - sizeof(rx_status)); - pdata = (u8 *)skb_put(uskb, skb->len); - memcpy(pdata, skb->data, skb->len); + if (uskb) { /* drop packet on allocation failure */ + memcpy(IEEE80211_SKB_RXCB(uskb), &rx_status, + sizeof(rx_status)); + pdata = (u8 *)skb_put(uskb, skb->len); + memcpy(pdata, skb->data, skb->len); + ieee80211_rx_irqsafe(hw, uskb); + } dev_kfree_skb_any(skb); - ieee80211_rx_irqsafe(hw, uskb); } else { dev_kfree_skb_any(skb); } |