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Re: [PATCH] block/io: fix bdrv_co_do_copy_on_readv

From: Stefan Hajnoczi
Subject: Re: [PATCH] block/io: fix bdrv_co_do_copy_on_readv
Date: Mon, 16 Mar 2020 11:46:46 +0000

On Thu, Mar 12, 2020 at 11:19:49AM +0300, Vladimir Sementsov-Ogievskiy wrote:
> Prior to 1143ec5ebf4 it was OK to qemu_iovec_from_buf() from aligned-up
> buffer to original qiov, as qemu_iovec_from_buf() will stop at qiov end
> anyway.
> But after 1143ec5ebf4 we assume that bdrv_co_do_copy_on_readv works on
> part of original qiov, defined by qiov_offset and bytes. So we must not
> touch qiov behind qiov_offset+bytes bound. Fix it.
> Cc: address@hidden # v4.2
> Fixes: 1143ec5ebf4
> Signed-off-by: Vladimir Sementsov-Ogievskiy <address@hidden>
> ---
>  block/io.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)

Thanks, applied to my block tree:


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