diff options
| author | Stefan Raspl <raspl@linux.vnet.ibm.com> | 2013-06-24 13:21:51 +0200 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2013-06-25 16:10:14 -0700 |
| commit | ede88671664128b811e7c709bead39f5b3f3abcf (patch) | |
| tree | d7084cf30706985a3b640c7806e7d89a04517073 /drivers/s390/net | |
| parent | a0c98523d7d71e0276f3cb127bc0c6d4fc85907a (diff) | |
| download | linux-ede88671664128b811e7c709bead39f5b3f3abcf.tar.bz2 | |
qeth: Fix crash on initial MTU size change
When the initial MTU size is changed prior to any activity on the device
(e.g. by attaching a z/VM vNIC already configured in Linux to a guestLAN),
we call dev_kfree_skb_irq(NULL) which results in a kernel panic.
Adding a proper check for NULL pointers to address this issue.
Signed-off-by: Stefan Raspl <raspl@linux.vnet.ibm.com>
Signed-off-by: Frank Blaschka <blaschka@linux.vnet.ibm.com>
Reviewed-by: Ursula Braun <braunu@de.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/s390/net')
| -rw-r--r-- | drivers/s390/net/qeth_core_main.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/drivers/s390/net/qeth_core_main.c b/drivers/s390/net/qeth_core_main.c index d7d036bf8715..e4ca70475190 100644 --- a/drivers/s390/net/qeth_core_main.c +++ b/drivers/s390/net/qeth_core_main.c @@ -1282,8 +1282,10 @@ static void qeth_free_qdio_buffers(struct qeth_card *card) qeth_free_cq(card); cancel_delayed_work_sync(&card->buffer_reclaim_work); - for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; ++j) - dev_kfree_skb_any(card->qdio.in_q->bufs[j].rx_skb); + for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; ++j) { + if (card->qdio.in_q->bufs[j].rx_skb) + dev_kfree_skb_any(card->qdio.in_q->bufs[j].rx_skb); + } kfree(card->qdio.in_q); card->qdio.in_q = NULL; /* inbound buffer pool */ |