This is a note to let you know that I've just added the patch titled
virtio_net: fix memory leak inside XPD_TX with mergeable
to the 5.15-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
virtio_net-fix-memory-leak-inside-xpd_tx-with-mergeable.patch
and it can be found in the queue-5.15 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 7a542bee27c6a57e45c33cbbdc963325fd6493af Mon Sep 17 00:00:00 2001
From: Xuan Zhuo <xuanzhuo@xxxxxxxxxxxxxxxxx>
Date: Thu, 4 Aug 2022 14:32:48 +0800
Subject: virtio_net: fix memory leak inside XPD_TX with mergeable
From: Xuan Zhuo <xuanzhuo@xxxxxxxxxxxxxxxxx>
commit 7a542bee27c6a57e45c33cbbdc963325fd6493af upstream.
When we call xdp_convert_buff_to_frame() to get xdpf, if it returns
NULL, we should check if xdp_page was allocated by xdp_linearize_page().
If it is newly allocated, it should be freed here alone. Just like any
other "goto err_xdp".
Fixes: 44fa2dbd4759 ("xdp: transition into using xdp_frame for ndo_xdp_xmit")
Signed-off-by: Xuan Zhuo <xuanzhuo@xxxxxxxxxxxxxxxxx>
Acked-by: Jason Wang <jasowang@xxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/net/virtio_net.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
--- a/drivers/net/virtio_net.c
+++ b/drivers/net/virtio_net.c
@@ -1017,8 +1017,11 @@ static struct sk_buff *receive_mergeable
case XDP_TX:
stats->xdp_tx++;
xdpf = xdp_convert_buff_to_frame(&xdp);
- if (unlikely(!xdpf))
+ if (unlikely(!xdpf)) {
+ if (unlikely(xdp_page != page))
+ put_page(xdp_page);
goto err_xdp;
+ }
err = virtnet_xdp_xmit(dev, 1, &xdpf, 0);
if (unlikely(!err)) {
xdp_return_frame_rx_napi(xdpf);
Patches currently in stable-queue which might be from xuanzhuo@xxxxxxxxxxxxxxxxx are
queue-5.15/virtio_net-fix-memory-leak-inside-xpd_tx-with-mergeable.patch
