From: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
To: Al Viro <viro@ZenIV.linux.org.uk>
Cc: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>,
Jens Axboe <axboe@kernel.dk>,
Andrew Morton <akpm@linux-foundation.org>,
Kay Sievers <kay.sievers@vrfy.org>,
Namhyung Kim <namhyung@gmail.com>,
Lukas Czerner <lczerner@redhat.com>,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH] loop: fput() called in loop_clr_fd() may cause bd_mutex recursive locking
Date: Sun, 18 Dec 2011 02:47:30 +0300 [thread overview]
Message-ID: <20111217234730.GE3313@swordfish> (raw)
In-Reply-To: <20111217233857.GD2203@ZenIV.linux.org.uk>
On (12/17/11 23:38), Al Viro wrote:
> On Sun, Dec 18, 2011 at 02:20:53AM +0300, Sergey Senozhatsky wrote:
>
> > > IOW, we have to prevent such setups anyway and not just because of
> > > problems on close() - they would be deadly on read() and write()...
> > >
> >
> > Preventing recursion in the first place? For example, in lo_open()?
>
> Uh? No, in loop_set_fd(), where we decide what loop devices will be
> backed by what - the code I quoted to you upthread.
>
Oops, sorry. Long day at work . Need to sleep.
Sergey
prev parent reply other threads:[~2011-12-17 23:50 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-12-17 21:53 [PATCH] loop: fput() called in loop_clr_fd() may cause bd_mutex recursive locking Sergey Senozhatsky
2011-12-17 22:12 ` Al Viro
2011-12-17 22:19 ` Sergey Senozhatsky
2011-12-17 22:30 ` Al Viro
2011-12-17 22:37 ` Sergey Senozhatsky
2011-12-17 22:58 ` Al Viro
2011-12-17 23:20 ` Sergey Senozhatsky
2011-12-17 23:38 ` Al Viro
2011-12-17 23:47 ` Sergey Senozhatsky [this message]
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