From: Pavel Skripkin <paskripkin@gmail.com>
To: Dan Carpenter <dan.carpenter@oracle.com>
Cc: Yanfei Xu <yanfei.xu@windriver.com>,
Bartosz Golaszewski <bgolaszewski@baylibre.com>,
andrew@lunn.ch, hkallweit1@gmail.com, linux@armlinux.org.uk,
davem@davemloft.net, kuba@kernel.org, p.zabel@pengutronix.de,
syzbot+398e7dc692ddbbb4cfec@syzkaller.appspotmail.com,
linux-kernel@vger.kernel.org, netdev@vger.kernel.org,
Dongliang Mu <mudongliangabcd@gmail.com>
Subject: Re: [PATCH] net: mdiobus: Fix memory leak in __mdiobus_register
Date: Tue, 28 Sep 2021 14:04:48 +0300 [thread overview]
Message-ID: <0ff35e57-978a-ed79-d401-cbe3f86835af@gmail.com> (raw)
In-Reply-To: <20210928105522.GK2083@kadam>
On 9/28/21 13:55, Dan Carpenter wrote:
> On Tue, Sep 28, 2021 at 01:46:56PM +0300, Pavel Skripkin wrote:
>> On 9/28/21 13:39, Dan Carpenter wrote:
>> > No, the syzbot link was correct.
>> >
>>
>> Link is correct, but Yanfei's patch does not fix this bug. Syzbot reported
>> leak, that you described below, not the Yanfei one.
>>
>
> I promise you that Yanfei's link was correct. That bug was in
> __devm_mdiobus_register(). It's a totally separate issue.
>
I must be missing something, or we are talking about different links :)
Let me explain why I think, that Yanfei's patch cannot fix leak reported
by syzkaller [1] (I hope, we are talking about this link)
Yanfei has changed this code part:
err = device_register(&bus->dev);
if (err) {
(*) pr_err("mii_bus %s failed to register\n", bus->id);
return -EINVAL;
}
So, if executing gets into this branch we should see error message (*),
right? There is no such message into log file on bug report page [1], so
how is it possible?
[1]
https://syzkaller.appspot.com/bug?id=fa99459691911a0369622248e0f4e3285fcedd97
With regards,
Pavel Skripkin
next prev parent reply other threads:[~2021-09-28 11:04 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-09-26 4:53 [PATCH] net: mdiobus: Fix memory leak in __mdiobus_register Yanfei Xu
2021-09-26 15:34 ` Andrew Lunn
2021-09-27 12:30 ` patchwork-bot+netdevbpf
2021-09-28 8:55 ` Dan Carpenter
2021-09-28 9:26 ` Dan Carpenter
2021-09-28 9:45 ` Pavel Skripkin
2021-09-28 10:39 ` Dan Carpenter
2021-09-28 10:46 ` Pavel Skripkin
2021-09-28 10:55 ` Dan Carpenter
2021-09-28 11:04 ` Pavel Skripkin [this message]
2021-09-28 10:59 ` Dan Carpenter
2021-09-28 11:06 ` Pavel Skripkin
2021-09-28 11:09 ` Pavel Skripkin
2021-09-28 11:30 ` Dan Carpenter
2021-09-28 11:45 ` Pavel Skripkin
2021-09-28 12:23 ` Dan Carpenter
2021-09-28 12:58 ` Russell King (Oracle)
2021-09-28 13:52 ` Dan Carpenter
2021-09-28 15:41 ` Russell King (Oracle)
2021-09-28 15:48 ` Dongliang Mu
2021-09-29 2:05 ` Xu, Yanfei
2021-09-28 13:11 ` Russell King (Oracle)
2021-09-29 21:31 ` Denis Efremov
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