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

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Message-Id: <DCP1E4UJ385D.JEXXJV4PPLJS@kernel.org>
Date: Wed, 10 Sep 2025 12:09:38 +0200
From: "Danilo Krummrich" <dakr@...nel.org>
To: "Greg KH" <gregkh@...uxfoundation.org>
Cc: "Edward Adam Davis" <eadavis@...com>,
 <syzbot+b6445765657b5855e869@...kaller.appspotmail.com>,
 <linux-fsdevel@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
 <rafael@...nel.org>, <syzkaller-bugs@...glegroups.com>
Subject: Re: [PATCH] USB: core: remove the move buf action

On Wed Sep 10, 2025 at 11:00 AM CEST, Greg KH 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].

Not sure how syzbot figures out the relevant recipients to send the report to
though. :)

[1] https://lore.kernel.org/all/68c118e8.a70a0220.3543fc.000e.GAE@google.com/