commit 410fdc72b05afabef3afb51167085799dcc7b3cf
author Darrick J. Wong <darrick.wong@oracle.com> Fri Oct 05 19:04:27 2018 +1000
committer Dave Chinner <david@fromorbit.com> Fri Oct 05 19:04:27 2018 +1000
tree b47c895971b7fd030a4b0ba3e0503fd1f7f8c274
parent 0d41e1d28c2e969094ef7933b8521f1e08d30251

xfs: zero posteof blocks when cloning above eof

When we're reflinking between two files and the destination file range
is well beyond the destination file's EOF marker, zero any posteof
speculative preallocations in the destination file so that we don't
expose stale disk contents.  The previous strategy of trying to clear
the preallocations does not work if the destination file has the
PREALLOC flag set.

Uncovered by shared/010.

Reported-by: Zorro Lang <zlang@redhat.com>
Bugzilla-id: https://bugzilla.kernel.org/show_bug.cgi?id=201259
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Signed-off-by: Dave Chinner <david@fromorbit.com>