gfs2: Truncate address space when flipping GFS2_DIF_JDATA flag

commit 7c9d922 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 <[email protected]>, Jiaji Qin <[email protected]> Signed-off-by: Andreas Gruenbacher <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]>
sirdarckcat · Feb 1, 2025 · 8c41abc · 8c41abc
1 parent 09f6986
commit 8c41abc
Showing 1 changed file with 1 addition and 0 deletions.
diff --git a/fs/gfs2/file.c b/fs/gfs2/file.c
@@ -271,6 +271,7 @@ static int do_gfs2_set_flags(struct file *filp, 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);
 	}