From: Daniel Jurgens <danielj@nvidia.com>
To: <netdev@vger.kernel.org>
Cc: <mst@redhat.com>, <jasowang@redhat.com>,
<xuanzhuo@linux.alibaba.com>, <virtualization@lists.linux.dev>,
<davem@davemloft.net>, <edumazet@google.com>, <kuba@kernel.org>,
<pabeni@redhat.com>, <jiri@nvidia.com>,
Daniel Jurgens <danielj@nvidia.com>,
Eric Dumazet <edumaset@google.com>
Subject: [PATCH] virtio_net: Fix missed rtnl_unlock
Date: Wed, 15 May 2024 09:31:20 -0500 [thread overview]
Message-ID: <20240515143120.563700-1-danielj@nvidia.com> (raw)
The rtnl_lock would stay locked if allocating promisc_allmulti failed.
Reported-by: Eric Dumazet <edumaset@google.com>
Link: https://lore.kernel.org/netdev/CANn89iLazVaUCvhPm6RPJJ0owra_oFnx7Fhc8d60gV-65ad3WQ@mail.gmail.com/
Signed-off-by: Daniel Jurgens <danielj@nvidia.com>
---
drivers/net/virtio_net.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c
index 19a9b50646c7..e2b7488f375e 100644
--- a/drivers/net/virtio_net.c
+++ b/drivers/net/virtio_net.c
@@ -2902,14 +2902,14 @@ static void virtnet_rx_mode_work(struct work_struct *work)
if (!virtio_has_feature(vi->vdev, VIRTIO_NET_F_CTRL_RX))
return;
- rtnl_lock();
-
promisc_allmulti = kzalloc(sizeof(*promisc_allmulti), GFP_ATOMIC);
if (!promisc_allmulti) {
dev_warn(&dev->dev, "Failed to set RX mode, no memory.\n");
return;
}
+ rtnl_lock();
+
*promisc_allmulti = !!(dev->flags & IFF_PROMISC);
sg_init_one(sg, promisc_allmulti, sizeof(*promisc_allmulti));
--
2.45.0
next reply other threads:[~2024-05-15 14:31 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-05-15 14:31 Daniel Jurgens [this message]
2024-05-15 15:07 ` [PATCH] virtio_net: Fix missed rtnl_unlock Michael S. Tsirkin
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