gfs2: Truncate address space when flipping GFS2_DIF_JDATA flag

commit 7c9d9223802fbed4dee1ae301661bf346964c9d2 upstream.

Truncate an inode's address space when flipping the GFS2_DIF_JDATA flag:
depending on that flag, the pages in the address space will either use
buffer heads or iomap_folio_state structs, and we cannot mix the two.

Reported-by: Kun Hu <huk23@m.fudan.edu.cn>, Jiaji Qin <jjtan24@m.fudan.edu.cn>
Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/fs/gfs2/file.c b/fs/gfs2/file.c
index e93185d804e0aae84d742d4699b8df7b20c87048..744eb526254e0aa14d5d9810320741b55e8d022d 100644 (file)
--- a/fs/gfs2/file.c
+++ b/fs/gfs2/file.c
@@ -257,6 +257,7 @@ static int do_gfs2_set_flags(struct inode *inode, u32 reqflags, u32 mask,
                error = filemap_fdatawait(inode->i_mapping);
                if (error)
                        goto out;
+               truncate_inode_pages(inode->i_mapping, 0);
                if (new_flags & GFS2_DIF_JDATA)
                        gfs2_ordered_del_inode(ip);
        }