linux-kernel - Re: [PATCH 1/1] USB: inode.c: fix unbalanced spin_lock in ep0

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Message-ID: <CALpNUzzXf9F3ec4rd0AGtftargVMZRK7T8_QssRe7Z0G_2j+bA@mail.gmail.com>
Date:	Fri, 11 Dec 2015 22:12:31 +0100
From:	David Eccher <d.eccher@...il.com>
To:	Al Viro <viro@...iv.linux.org.uk>
Cc:	Felipe Balbi <balbi@...com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/1] USB: inode.c: fix unbalanced spin_lock in ep0_write

On Fri, Dec 11, 2015 at 9:11 PM, Al Viro <viro@...iv.linux.org.uk> wrote:
>
> On Fri, Dec 11, 2015 at 08:56:26PM +0100, David Eccher wrote:
> > Fix bad unlock balance: ep0_write enter with the locks locked from inode.c:1769,
> > hence it must exit with spinlock held to avoid double unlock in dev_config.
>
> *Ugh*
>
> Just take that spinlock before the if (retval < 0) and don't drop it after
> clear_req(), then...

Oh, yeah good point, I'll send a v2...and test the patch thru
checkpatch.pl, sorry



-- 
David Eccher
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