linux-kernel - Re: [PATCH] vrf: Fix possible NULL pointer oops when delete nic

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Message-Id: <20191116.125316.1859622454319892445.davem@davemloft.net>
Date:   Sat, 16 Nov 2019 12:53:16 -0800 (PST)
From:   David Miller <davem@...emloft.net>
To:     wangxiaogang3@...wei.com
Cc:     dsahern@...nel.org, shrijeet@...il.com, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org, hujunwei4@...wei.com,
        xuhanbing@...wei.com, ap420073@...il.com
Subject: Re: [PATCH] vrf: Fix possible NULL pointer oops when delete nic

From: "wangxiaogang (F)" <wangxiaogang3@...wei.com>
Date: Fri, 15 Nov 2019 14:22:56 +0800

> From: XiaoGang Wang <wangxiaogang3@...wei.com>
> 
> Recently we get a crash when access illegal address (0xc0),
> which will occasionally appear when deleting a physical NIC with vrf.
> 
> [166603.826737]hinic 0000:43:00.4 eth-s3: Failed to cycle device eth-s3;
> route tables might be wrong!
> .....
> [166603.828018]WARNING: CPU: 135 PID: 15382at net/core/dev.c:6875
> __netdev_adjacent_dev_remove.constprop.40+0x1e0/0x1e8
> ......

Taehee-ssi, please take a look at this.

It is believed that this may be caused by the adjacency fixes you made
recently.

Thank you.