From: Andrew Morton <akpm@osdl.org>
To: Matt Mackall <mpm@selenic.com>
Cc: linux-kernel@vger.kernel.org
Subject: Re: [PATCH] [1/2] random: SMP locking
Date: Sat, 2 Aug 2003 12:46:47 -0700 [thread overview]
Message-ID: <20030802124647.62ad775f.akpm@osdl.org> (raw)
In-Reply-To: <20030802193306.GK22824@waste.org>
Matt Mackall <mpm@selenic.com> wrote:
>
> + spin_lock(&random_state->lock);
> + ent_count = random_state->entropy_count;
> + memcpy(tmp, random_state->pool, size * sizeof(__u32));
> + spin_unlock(&random_state->lock);
> +
This needs to be spin_lock_irqsave().
> + if (!copy_to_user(p, tmp, size * sizeof(__u32))) {
> + kfree(tmp);
> + goto fail;
> + }
> +
> + kfree(tmp);
> +
> + if(put_user(ent_count, p++))
> + goto fail;
> +
> return 0;
> + fail:
> + spin_unlock(&random_state->lock);
Double unlock ;)
next prev parent reply other threads:[~2003-08-02 19:45 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-08-02 4:24 [PATCH] [1/2] random: SMP locking Oliver Xymoron
2003-08-02 11:00 ` Andrew Morton
2003-08-02 12:35 ` Zwane Mwaikambo
2003-08-02 14:43 ` Matt Mackall
2003-08-02 15:02 ` Zwane Mwaikambo
2003-08-02 18:39 ` Andrew Morton
2003-08-02 18:42 ` Matt Mackall
2003-08-02 14:32 ` Matt Mackall
2003-08-02 19:00 ` Andrew Morton
2003-08-02 19:33 ` Matt Mackall
2003-08-02 19:46 ` Andrew Morton [this message]
2003-08-02 20:14 ` Matt Mackall
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