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Date: Tue, 20 May 2014 15:16:22 +0200
From: Stefan Hajnoczi <stefanha@redhat.com>
Message-ID: <20140520131622.GA22753@stefanha-thinkpad.redhat.com>
References: <1400551247-4798-1-git-send-email-famz@redhat.com>
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In-Reply-To: <1400551247-4798-1-git-send-email-famz@redhat.com>
Subject: Re: [Qemu-devel] [PATCH v2] aio: Fix use-after-free in cancellation
	path
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To: Fam Zheng <famz@redhat.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>, qemu-devel@nongnu.org, uobergfe@redhat.com

On Tue, May 20, 2014 at 10:00:47AM +0800, Fam Zheng wrote:
> diff --git a/thread-pool.c b/thread-pool.c
> index fbdd3ff..d4984ba 100644
> --- a/thread-pool.c
> +++ b/thread-pool.c
> @@ -223,6 +223,7 @@ static void thread_pool_cancel(BlockDriverAIOCB *acb)
>          }
>          pool->pending_cancellations--;
>      }
> +    event_notifier_ready(&pool->notifier);
>      qemu_mutex_unlock(&pool->lock);
>  }

event_notifier_ready() doesn't need pool->lock.  Can you call it outside
the lock or am I missing something?

Stefan