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New code for 6.1:

Browse source 
- Fix a UAF bug when recording writeback mapping errors.
  - Add a tracepoint so that we can monitor writeback mappings.
 
 Signed-off-by: Darrick J. Wong <djwong@kernel.org>
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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
This commit is contained in:
Linus Torvalds 2022-10-06 17:57:50 -07:00
parent bc32a6330f adc9c2e5a7
commit 4c86114194
2 changed files with 3 additions and 1 deletions
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3
fs/iomap/buffered-io.c
View file

@ -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;
}

1
fs/iomap/trace.h
View file

@ -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,