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This is an NFC LLCP fix for 3.7 and contains only one patch.

Browse Source 
It fixes a potential crash when receiving an LLCP HDLC frame acking a frame
 that is not the last sent one. In that case we may dereference an already
 freed pointer.
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Merge tag 'nfc-fixes-3.7-2' of git://git.kernel.org/pub/scm/linux/kernel/git/sameo/nfc-3.0

This is an NFC LLCP fix for 3.7 and contains only one patch.

It fixes a potential crash when receiving an LLCP HDLC frame acking a frame
that is not the last sent one. In that case we may dereference an already
freed pointer.
This commit is contained in:
John W. Linville 2012-12-06 14:55:57 -05:00
commit 55cb0797fa
3 changed files with 10 additions and 9 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

12
drivers/net/wireless/iwlwifi/dvm/rxon.c
View File

@ -1012,12 +1012,12 @@ static void iwl_calc_basic_rates(struct iwl_priv *priv,
* As a consequence, it's not as complicated as it sounds, just add
* any lower rates to the ACK rate bitmap.
*/
if (IWL_RATE_11M_INDEX < lowest_present_ofdm)
ofdm |= IWL_RATE_11M_MASK >> IWL_FIRST_CCK_RATE;
if (IWL_RATE_5M_INDEX < lowest_present_ofdm)
ofdm |= IWL_RATE_5M_MASK >> IWL_FIRST_CCK_RATE;
if (IWL_RATE_2M_INDEX < lowest_present_ofdm)
ofdm |= IWL_RATE_2M_MASK >> IWL_FIRST_CCK_RATE;
if (IWL_RATE_11M_INDEX < lowest_present_cck)
cck |= IWL_RATE_11M_MASK >> IWL_FIRST_CCK_RATE;
if (IWL_RATE_5M_INDEX < lowest_present_cck)
cck |= IWL_RATE_5M_MASK >> IWL_FIRST_CCK_RATE;
if (IWL_RATE_2M_INDEX < lowest_present_cck)
cck |= IWL_RATE_2M_MASK >> IWL_FIRST_CCK_RATE;
/* 1M already there or needed so always add */
cck |= IWL_RATE_1M_MASK >> IWL_FIRST_CCK_RATE;

2
net/mac80211/offchannel.c
View File

@ -462,8 +462,6 @@ void ieee80211_roc_purge(struct ieee80211_sub_if_data *sdata)
list_move_tail(&roc->list, &tmp_list);
roc->abort = true;
}
ieee80211_start_next_roc(local);
mutex_unlock(&local->mtx);
list_for_each_entry_safe(roc, tmp, &tmp_list, list) {

5
net/nfc/llcp/llcp.c
View File

@ -985,15 +985,18 @@ static void nfc_llcp_recv_hdlc(struct nfc_llcp_local *local,
/* Remove skbs from the pending queue */
if (llcp_sock->send_ack_n != nr) {
struct sk_buff *s, *tmp;
u8 n;
llcp_sock->send_ack_n = nr;
/* Remove and free all skbs until ns == nr */
skb_queue_walk_safe(&llcp_sock->tx_pending_queue, s, tmp) {
n = nfc_llcp_ns(s);
skb_unlink(s, &llcp_sock->tx_pending_queue);
kfree_skb(s);
if (nfc_llcp_ns(s) == nr)
if (n == nr)
break;
}