diff options
| author | Russ Gorby <russ.gorby@intel.com> | 2012-08-13 13:45:30 +0100 |
|---|---|---|
| committer | Ben Hutchings <ben@decadent.org.uk> | 2012-10-17 03:48:18 +0100 |
| commit | f11829e7da3cd59400fe60287a3c3a11a6ddb2ac (patch) | |
| tree | 6928fb247bae361481d92e0554a6aa848f9c4c73 /drivers/tty | |
| parent | 0afc4d3b3b1320437cdcc8a290ba9dd9dabe35c0 (diff) | |
n_gsm: memory leak in uplink error path
commit 88ed2a60610974443335c924d7cb8e5dcf9dbdc1 upstream.
Uplink (TX) network data will go through gsm_dlci_data_output_framed
there is a bug where if memory allocation fails, the skb which
has already been pulled off the list will be lost.
In addition TX skbs were being processed in LIFO order
Fixed the memory leak, and changed to FIFO order processing
Signed-off-by: Russ Gorby <russ.gorby@intel.com>
Tested-by: Kappel, LaurentX <laurentx.kappel@intel.com>
Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Diffstat (limited to 'drivers/tty')
| -rw-r--r-- | drivers/tty/n_gsm.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/drivers/tty/n_gsm.c b/drivers/tty/n_gsm.c index d603ca32e19a..d1902696e272 100644 --- a/drivers/tty/n_gsm.c +++ b/drivers/tty/n_gsm.c @@ -868,7 +868,7 @@ static int gsm_dlci_data_output_framed(struct gsm_mux *gsm, /* dlci->skb is locked by tx_lock */ if (dlci->skb == NULL) { - dlci->skb = skb_dequeue(&dlci->skb_list); + dlci->skb = skb_dequeue_tail(&dlci->skb_list); if (dlci->skb == NULL) return 0; first = 1; @@ -892,8 +892,11 @@ static int gsm_dlci_data_output_framed(struct gsm_mux *gsm, /* FIXME: need a timer or something to kick this so it can't get stuck with no work outstanding and no buffer free */ - if (msg == NULL) + if (msg == NULL) { + skb_queue_tail(&dlci->skb_list, dlci->skb); + dlci->skb = NULL; return -ENOMEM; + } dp = msg->data; if (dlci->adaption == 4) { /* Interruptible framed (Packetised Data) */ |