linux-kernel - Re: [PATCH] USB: core: remove the move buf action

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Message-ID: <tencent_E396DE36C64AA675ED76D1675E3C3D378609@qq.com>
Date: Wed, 10 Sep 2025 19:00:11 +0800
From: Edward Adam Davis <eadavis@...com>
To: dakr@...nel.org
Cc: eadavis@...com,
	gregkh@...uxfoundation.org,
	linux-fsdevel@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	rafael@...nel.org,
	syzbot+b6445765657b5855e869@...kaller.appspotmail.com,
	syzkaller-bugs@...glegroups.com
Subject: Re: [PATCH] USB: core: remove the move buf action

On Wed, 10 Sep 2025 12:09:38 +0200, Danilo Krummrich wrote:
>> On Wed, Sep 10, 2025 at 03:58:47PM +0800, Edward Adam Davis wrote:
>>> The buffer size of sysfs is fixed at PAGE_SIZE, and the page offset
>>> of the buf parameter of sysfs_emit_at() must be 0, there is no need
>>> to manually manage the buf pointer offset.
>>>
>>> Fixes: 711d41ab4a0e ("usb: core: Use sysfs_emit_at() when showing dynamic IDs")
>>> Reported-by: syzbot+b6445765657b5855e869@...kaller.appspotmail.com
>>> Closes: https://syzkaller.appspot.com/bug?extid=b6445765657b5855e869
>>> Tested-by: syzbot+b6445765657b5855e869@...kaller.appspotmail.com
>>> Signed-off-by: Edward Adam Davis <eadavis@...com>
>>> ---
>>>  drivers/usb/core/driver.c | 4 ++--
>>>  1 file changed, 2 insertions(+), 2 deletions(-)
>>
>> While this fix looks correct, your cc: list is very odd as this is a
>> linux-usb bug, not a driver core issue, right?
>
>I think Edward derived the Cc: list from the recipients of the syzbot report
>in [1].
You understand me.