* [dpdk-stable] [PATCH] virtio: fix buffer leak on vlan insert
@ 2019-04-05 0:03 Stephen Hemminger
2019-04-05 7:43 ` [dpdk-stable] [dpdk-dev] " Jens Freimann
[not found] ` <20190405163115.5068-1-stephen@networkplumber.org>
0 siblings, 2 replies; 3+ messages in thread
From: Stephen Hemminger @ 2019-04-05 0:03 UTC (permalink / raw)
To: maxime.coquelin; +Cc: dev, stable, Stephen Hemminger
The function rte_vlan_insert may allocate a new buffer for the
vlan header and return a different mbuf than originally passed.
In this case, the stored mbuf in txm[] array could point to wrong
buffer.
Fixes: dd856dfcb9e7 ("virtio: use any layout on Tx")
Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
---
drivers/net/virtio/virtio_rxtx.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/net/virtio/virtio_rxtx.c b/drivers/net/virtio/virtio_rxtx.c
index e6f3706d6fe1..2ae4232c181d 100644
--- a/drivers/net/virtio/virtio_rxtx.c
+++ b/drivers/net/virtio/virtio_rxtx.c
@@ -2003,6 +2003,8 @@ virtio_xmit_pkts_packed(void *tx_queue, struct rte_mbuf **tx_pkts,
rte_pktmbuf_free(txm);
continue;
}
+ /* vlan_insert may add a header mbuf */
+ tx_pkts[nb_tx] = txm;
}
/* optimize ring usage */
--
2.17.1
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: [dpdk-stable] [dpdk-dev] [PATCH] virtio: fix buffer leak on vlan insert
2019-04-05 0:03 [dpdk-stable] [PATCH] virtio: fix buffer leak on vlan insert Stephen Hemminger
@ 2019-04-05 7:43 ` Jens Freimann
[not found] ` <20190405163115.5068-1-stephen@networkplumber.org>
1 sibling, 0 replies; 3+ messages in thread
From: Jens Freimann @ 2019-04-05 7:43 UTC (permalink / raw)
To: Stephen Hemminger; +Cc: maxime.coquelin, dev, stable
On Thu, Apr 04, 2019 at 05:03:43PM -0700, Stephen Hemminger wrote:
>The function rte_vlan_insert may allocate a new buffer for the
>vlan header and return a different mbuf than originally passed.
>In this case, the stored mbuf in txm[] array could point to wrong
>buffer.
>
>Fixes: dd856dfcb9e7 ("virtio: use any layout on Tx")
>Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
>---
> drivers/net/virtio/virtio_rxtx.c | 2 ++
> 1 file changed, 2 insertions(+)
>
>diff --git a/drivers/net/virtio/virtio_rxtx.c b/drivers/net/virtio/virtio_rxtx.c
>index e6f3706d6fe1..2ae4232c181d 100644
>--- a/drivers/net/virtio/virtio_rxtx.c
>+++ b/drivers/net/virtio/virtio_rxtx.c
>@@ -2003,6 +2003,8 @@ virtio_xmit_pkts_packed(void *tx_queue, struct rte_mbuf **tx_pkts,
> rte_pktmbuf_free(txm);
> continue;
> }
>+ /* vlan_insert may add a header mbuf */
>+ tx_pkts[nb_tx] = txm;
> }
>
> /* optimize ring usage */
Good catch. I think we have the same bug in virtio_xmit_pkts() and
virtio_xmit_pkts_inorder() and should fix these as well.
Thanks!
regards,
Jens
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: [dpdk-stable] [dpdk-dev] [PATCH v2] virtio: fix buffer leak on vlan insert
[not found] ` <20190405163115.5068-1-stephen@networkplumber.org>
@ 2019-04-08 9:21 ` Jens Freimann
0 siblings, 0 replies; 3+ messages in thread
From: Jens Freimann @ 2019-04-08 9:21 UTC (permalink / raw)
To: Stephen Hemminger; +Cc: dev, stable, maxime.coquelin
On Fri, Apr 05, 2019 at 09:31:15AM -0700, Stephen Hemminger wrote:
>The function rte_vlan_insert may allocate a new buffer for the
>vlan header and return a different mbuf than originally passed.
>In this case, the stored mbuf in txm[] array could point to wrong
>buffer.
>
>Fixes: dd856dfcb9e7 ("virtio: use any layout on Tx")
>Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
>---
>v2 - catch a couple more places.
> The virtio code needs some refactoring to not have 3 copies of same
> loop...
>
> drivers/net/virtio/virtio_rxtx.c | 6 ++++++
> 1 file changed, 6 insertions(+)
>
Added stable@ back to Cc list as it was for v1.
Reviewed-by: Jens Freimann <jfreimann@redhat.com>
^ permalink raw reply [flat|nested] 3+ messages in thread
end of thread, other threads:[~2019-04-08 9:22 UTC | newest]
Thread overview: 3+ messages (download: mbox.gz / follow: Atom feed)
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2019-04-05 0:03 [dpdk-stable] [PATCH] virtio: fix buffer leak on vlan insert Stephen Hemminger
2019-04-05 7:43 ` [dpdk-stable] [dpdk-dev] " Jens Freimann
[not found] ` <20190405163115.5068-1-stephen@networkplumber.org>
2019-04-08 9:21 ` [dpdk-stable] [dpdk-dev] [PATCH v2] " Jens Freimann
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