From: Shiyang Ruan Date: Fri, 30 Jun 2023 00:40:30 +0000 (-0700) Subject: xfs: fix the calculation for "end" and "length" X-Git-Tag: v6.6.17~4399^2~3 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=5cf32f63b0f4c520460c1a5dd915dc4f09085f29;p=platform%2Fkernel%2Flinux-rpi.git xfs: fix the calculation for "end" and "length" The value of "end" should be "start + length - 1". Signed-off-by: Shiyang Ruan Reviewed-by: Darrick J. Wong Signed-off-by: Darrick J. Wong --- diff --git a/fs/xfs/xfs_notify_failure.c b/fs/xfs/xfs_notify_failure.c index c4078d0..4a9bbd3 100644 --- a/fs/xfs/xfs_notify_failure.c +++ b/fs/xfs/xfs_notify_failure.c @@ -114,7 +114,8 @@ xfs_dax_notify_ddev_failure( int error = 0; xfs_fsblock_t fsbno = XFS_DADDR_TO_FSB(mp, daddr); xfs_agnumber_t agno = XFS_FSB_TO_AGNO(mp, fsbno); - xfs_fsblock_t end_fsbno = XFS_DADDR_TO_FSB(mp, daddr + bblen); + xfs_fsblock_t end_fsbno = XFS_DADDR_TO_FSB(mp, + daddr + bblen - 1); xfs_agnumber_t end_agno = XFS_FSB_TO_AGNO(mp, end_fsbno); error = xfs_trans_alloc_empty(mp, &tp); @@ -210,7 +211,7 @@ xfs_dax_notify_failure( ddev_end = ddev_start + bdev_nr_bytes(mp->m_ddev_targp->bt_bdev) - 1; /* Ignore the range out of filesystem area */ - if (offset + len < ddev_start) + if (offset + len - 1 < ddev_start) return -ENXIO; if (offset > ddev_end) return -ENXIO; @@ -222,8 +223,8 @@ xfs_dax_notify_failure( len -= ddev_start - offset; offset = 0; } - if (offset + len > ddev_end) - len -= ddev_end - offset; + if (offset + len - 1 > ddev_end) + len = ddev_end - offset + 1; return xfs_dax_notify_ddev_failure(mp, BTOBB(offset), BTOBB(len), mf_flags);