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Re: [Qemu-stable] [PATCH v7] virtio-blk: fix reference a pointer which m
From: |
Paolo Bonzini |
Subject: |
Re: [Qemu-stable] [PATCH v7] virtio-blk: fix reference a pointer which might be freed |
Date: |
Mon, 18 Aug 2014 10:08:36 +0200 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:24.0) Gecko/20100101 Thunderbird/24.7.0 |
Il 18/08/2014 09:42, zhanghailiang ha scritto:
> In function virtio_blk_handle_request, it may freed memory pointed by req,
> So do not access member of req after calling this function.
>
> Reviewed-by: Michael S. Tsirkin <address@hidden>
> Reviewed-by: Stefan Hajnoczi <address@hidden>
> Signed-off-by: zhanghailiang <address@hidden>
> ---
> hw/block/virtio-blk.c | 3 ++-
> 1 file changed, 2 insertions(+), 1 deletion(-)
>
> diff --git a/hw/block/virtio-blk.c b/hw/block/virtio-blk.c
> index c241c50..0e3925b 100644
> --- a/hw/block/virtio-blk.c
> +++ b/hw/block/virtio-blk.c
> @@ -469,8 +469,9 @@ static void virtio_blk_dma_restart_bh(void *opaque)
> s->rq = NULL;
>
> while (req) {
> + VirtIOBlockReq *next = req->next;
> virtio_blk_handle_request(req, &mrb);
> - req = req->next;
> + req = next;
> }
>
> virtio_submit_multiwrite(s->bs, &mrb);
>
Cc: address@hidden
- Re: [Qemu-stable] [PATCH v7] virtio-blk: fix reference a pointer which might be freed,
Paolo Bonzini <=