Merge tag 'iomap-6.1-merge-1' of git://git.kernel.org/pub/scm/fs/xfs/…

…xfs-linux

Pull iomap updates from Darrick Wong:
 "It's pretty quiet this time around -- a UAF bugfix and a new
  tracepoint so we can watch file writeback:

   - Fix a UAF bug when recording writeback mapping errors

   - Add a tracepoint so that we can monitor writeback mappings"

* tag 'iomap-6.1-merge-1' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux:
  iomap: add a tracepoint for mappings returned by map_blocks
  iomap: iomap: fix memory corruption when recording errors during writeback

fs/iomap/buffered-io.c

@@ -1360,6 +1360,7 @@ iomap_writepage_map(struct iomap_writepage_ctx *wpc,
 		error = wpc->ops->map_blocks(wpc, inode, pos);
 		if (error)
 			break;
+		trace_iomap_writepage_map(inode, &wpc->iomap);
 		if (WARN_ON_ONCE(wpc->iomap.type == IOMAP_INLINE))
 			continue;
 		if (wpc->iomap.type == IOMAP_HOLE)
@@ -1421,7 +1422,7 @@ iomap_writepage_map(struct iomap_writepage_ctx *wpc,
 	if (!count)
 		folio_end_writeback(folio);
 done:
-	mapping_set_error(folio->mapping, error);
+	mapping_set_error(inode->i_mapping, error);
 	return error;
 }
 

fs/iomap/trace.h

@@ -148,6 +148,7 @@ DEFINE_EVENT(iomap_class, name,	\
 	TP_ARGS(inode, iomap))
 DEFINE_IOMAP_EVENT(iomap_iter_dstmap);
 DEFINE_IOMAP_EVENT(iomap_iter_srcmap);
+DEFINE_IOMAP_EVENT(iomap_writepage_map);
 
 TRACE_EVENT(iomap_iter,
 	TP_PROTO(struct iomap_iter *iter, const void *ops,