linux-kernel - [PATCH AUTOSEL 4.19 24/55] virtio_net: Remove BUG() to avoid machine dead

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Message-Id: <20210706112638.2065023-24-sashal@kernel.org>
Date:   Tue,  6 Jul 2021 07:26:07 -0400
From:   Sasha Levin <sashal@...nel.org>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:     Xianting Tian <xianting.tian@...ux.alibaba.com>,
        Leon Romanovsky <leonro@...dia.com>,
        "David S . Miller" <davem@...emloft.net>,
        Sasha Levin <sashal@...nel.org>,
        virtualization@...ts.linux-foundation.org, netdev@...r.kernel.org
Subject: [PATCH AUTOSEL 4.19 24/55] virtio_net: Remove BUG() to avoid machine dead

From: Xianting Tian <xianting.tian@...ux.alibaba.com>

[ Upstream commit 85eb1389458d134bdb75dad502cc026c3753a619 ]

We should not directly BUG() when there is hdr error, it is
better to output a print when such error happens. Currently,
the caller of xmit_skb() already did it.

Signed-off-by: Xianting Tian <xianting.tian@...ux.alibaba.com>
Reviewed-by: Leon Romanovsky <leonro@...dia.com>
Signed-off-by: David S. Miller <davem@...emloft.net>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/net/virtio_net.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c
index 0b1c6a8906b9..84a82c4a9535 100644
--- a/drivers/net/virtio_net.c
+++ b/drivers/net/virtio_net.c
@@ -1550,7 +1550,7 @@ static int xmit_skb(struct send_queue *sq, struct sk_buff *skb)
 	if (virtio_net_hdr_from_skb(skb, &hdr->hdr,
 				    virtio_is_little_endian(vi->vdev), false,
 				    0))
-		BUG();
+		return -EPROTO;
 
 	if (vi->mergeable_rx_bufs)
 		hdr->num_buffers = 0;
-- 
2.30.2