From: Alan Cox <alan@lxorguk.ukuu.org.uk>
To: Jesper Juhl <juhl-lkml@dif.dk>
Cc: Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
Gadi Oxman <gadio@netvision.net.il>, Jens Axboe <axboe@suse.de>,
Andrew Morton <akpm@osdl.org>
Subject: Re: [PATCH][2/2] ide-tape: small cleanups - handle copy_to|from_user() failures
Date: Sun, 28 Nov 2004 17:34:28 +0000 [thread overview]
Message-ID: <1101663266.16761.43.camel@localhost.localdomain> (raw)
In-Reply-To: <Pine.LNX.4.61.0411281731050.3389@dragon.hygekrogen.localhost>
On Sul, 2004-11-28 at 16:32, Jesper Juhl wrote:
> #endif /* IDETAPE_DEBUG_BUGS */
> count = min((unsigned int)(bh->b_size - atomic_read(&bh->b_count)), (unsigned int)n);
> - copy_from_user(bh->b_data + atomic_read(&bh->b_count), buf, count);
> + if (copy_from_user(bh->b_data + atomic_read(&bh->b_count), buf, count))
> + return -EFAULT;
> n -= count;
> atomic_add(count, &bh->b_count);
> buf += count;
If you do this then you don't fix up tape->bh for further operations.
Have you tested these changes including the I/O errors ?
next prev parent reply other threads:[~2004-11-28 18:37 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-11-28 16:32 Jesper Juhl
2004-11-28 17:34 ` Alan Cox [this message]
2004-11-28 19:39 ` Jesper Juhl
2004-11-28 21:16 ` Jesper Juhl
2004-11-29 22:47 ` Bill Davidsen
2004-11-29 23:23 ` Jesper Juhl
2004-11-30 12:03 ` Alan Cox
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