tree 16d641a9b40682f8a027f6175bc9efe570a9687d
parent 86f84779d8e92a690b2f281175ea06b884cb6fa4
author Andreas Gruenbacher <agruenba@redhat.com> 1520255905 -0700
committer Bob Peterson <rpeterso@redhat.com> 1520448038 -0700

gfs2: Fixes to "Implement iomap for block_map" (2)

It turns out that commit 3229c18c0d6b2 'Fixes to "Implement iomap for
block_map"' introduced another bug in gfs2_iomap_begin that can cause
gfs2_block_map to set bh->b_size of an actual buffer to 0.  This can
lead to arbitrary incorrect behavior including crashes or disk
corruption.  Revert the incorrect part of that commit.

Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
Signed-off-by: Bob Peterson <rpeterso@redhat.com>