From 134b7dec6ec2d90616d7986afb3b3b7ca7a4c383 Mon Sep 17 00:00:00 2001 From: Max Reitz Date: Tue, 28 Jul 2020 14:08:04 +0200 Subject: block: Fix bdrv_aligned_p*v() for qiov_offset != 0 Since these functions take a @qiov_offset, they must always take it into account when working with @qiov. There are a couple of places where they do not, but they should. Fixes: 65cd4424b9df03bb5195351c33e04cbbecc0705c ("block/io: bdrv_aligned_preadv: use and support qiov_offset") Fixes: 28c4da28695bdbe04b336b2c9c463876cc3aaa6d ("block/io: bdrv_aligned_pwritev: use and support qiov_offset") Reported-by: Claudio Fontana Reported-by: Bruce Rogers Cc: qemu-stable@nongnu.org Signed-off-by: Max Reitz Message-Id: <20200728120806.265916-2-mreitz@redhat.com> Reviewed-by: Vladimir Sementsov-Ogievskiy Tested-by: Claudio Fontana Tested-by: Bruce Rogers --- block/io.c | 10 ++++++---- 1 file changed, 6 insertions(+), 4 deletions(-) (limited to 'block') diff --git a/block/io.c b/block/io.c index b6564e3..ad3a51e 100644 --- a/block/io.c +++ b/block/io.c @@ -1524,12 +1524,13 @@ static int coroutine_fn bdrv_aligned_preadv(BdrvChild *child, assert(num); ret = bdrv_driver_preadv(bs, offset + bytes - bytes_remaining, - num, qiov, bytes - bytes_remaining, 0); + num, qiov, + qiov_offset + bytes - bytes_remaining, 0); max_bytes -= num; } else { num = bytes_remaining; - ret = qemu_iovec_memset(qiov, bytes - bytes_remaining, 0, - bytes_remaining); + ret = qemu_iovec_memset(qiov, qiov_offset + bytes - bytes_remaining, + 0, bytes_remaining); } if (ret < 0) { goto out; @@ -2032,7 +2033,8 @@ static int coroutine_fn bdrv_aligned_pwritev(BdrvChild *child, } ret = bdrv_driver_pwritev(bs, offset + bytes - bytes_remaining, - num, qiov, bytes - bytes_remaining, + num, qiov, + qiov_offset + bytes - bytes_remaining, local_flags); if (ret < 0) { break; -- cgit v1.1