This is a note to let you know that I've just added the patch titled xfs: bad assertion for delalloc an extent that start at i_size to the 3.18-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: xfs-bad-assertion-for-delalloc-an-extent-that-start-at-i_size.patch and it can be found in the queue-3.18 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. >From 892d2a5f705723b2cb488bfb38bcbdcf83273184 Mon Sep 17 00:00:00 2001 From: Zorro Lang <zlang@xxxxxxxxxx> Date: Mon, 15 May 2017 08:40:02 -0700 Subject: xfs: bad assertion for delalloc an extent that start at i_size From: Zorro Lang <zlang@xxxxxxxxxx> commit 892d2a5f705723b2cb488bfb38bcbdcf83273184 upstream. By run fsstress long enough time enough in RHEL-7, I find an assertion failure (harder to reproduce on linux-4.11, but problem is still there): XFS: Assertion failed: (iflags & BMV_IF_DELALLOC) != 0, file: fs/xfs/xfs_bmap_util.c The assertion is in xfs_getbmap() funciton: if (map[i].br_startblock == DELAYSTARTBLOCK && --> map[i].br_startoff <= XFS_B_TO_FSB(mp, XFS_ISIZE(ip))) ASSERT((iflags & BMV_IF_DELALLOC) != 0); When map[i].br_startoff == XFS_B_TO_FSB(mp, XFS_ISIZE(ip)), the startoff is just at EOF. But we only need to make sure delalloc extents that are within EOF, not include EOF. Signed-off-by: Zorro Lang <zlang@xxxxxxxxxx> Reviewed-by: Brian Foster <bfoster@xxxxxxxxxx> Reviewed-by: Darrick J. Wong <darrick.wong@xxxxxxxxxx> Signed-off-by: Darrick J. Wong <darrick.wong@xxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- fs/xfs/xfs_bmap_util.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/fs/xfs/xfs_bmap_util.c +++ b/fs/xfs/xfs_bmap_util.c @@ -659,7 +659,7 @@ xfs_getbmap( * extents. */ if (map[i].br_startblock == DELAYSTARTBLOCK && - map[i].br_startoff <= XFS_B_TO_FSB(mp, XFS_ISIZE(ip))) + map[i].br_startoff < XFS_B_TO_FSB(mp, XFS_ISIZE(ip))) ASSERT((iflags & BMV_IF_DELALLOC) != 0); if (map[i].br_startblock == HOLESTARTBLOCK && Patches currently in stable-queue which might be from zlang@xxxxxxxxxx are queue-3.18/xfs-bad-assertion-for-delalloc-an-extent-that-start-at-i_size.patch