linux-kernel - Re: [PATCH] net-sysfs: fix error handling in netdev_register

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <Z9Ke3moM5BVSsPax@smile.fi.intel.com>
Date: Thu, 13 Mar 2025 11:01:18 +0200
From: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To: Ma Ke <make24@...as.ac.cn>
Cc: davem@...emloft.net, edumazet@...gle.com, kuba@...nel.org,
	pabeni@...hat.com, horms@...nel.org, jdamato@...tly.com,
	aleksander.lobakin@...el.com, quic_zijuhu@...cinc.com,
	wanghai26@...wei.com, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org, stable@...r.kernel.org
Subject: Re: [PATCH] net-sysfs: fix error handling in
 netdev_register_kobject()

On Thu, Mar 13, 2025 at 03:55:28PM +0800, Ma Ke wrote:
> Once device_add() failed, we should call put_device() to decrement
> reference count for cleanup. Or it could cause memory leak.
> 
> As comment of device_add() says, 'if device_add() succeeds, you should
> call device_del() when you want to get rid of it. If device_add() has
> not succeeded, use only put_device() to drop the reference count'.

Okay, have you read the history of this?
6b70fc94afd1 ("net-sysfs: Fix memory leak in netdev_register_kobject")
8ed633b9baf9 ("Revert "net-sysfs: Fix memory leak in netdev_register_kobject"")
https://syzkaller.appspot.com/x/log.txt?x=1737671b200000

TL;DR: next time provide a better changelog and clean syzkaller report.

-- 
With Best Regards,
Andy Shevchenko