[PATCH 04/16] squashfs: unmap the current page when a readahead fragment copy fails

[Tal Zussman]

If copying the fragment into the readahead pages fails,
squashfs_readahead_fragment() frees the page actor while the current
page is still mapped with kmap_local_page() and never unmaps it.

Call squashfs_finish_page() before freeing the actor, like the success
path does through squashfs_next_page().

Fixes: b09a7a036d20 ("squashfs: support reading fragments in readahead call")
Cc: stable@xxxxxxxxxxxxxxx
Signed-off-by: Tal Zussman <tz2294@xxxxxxxxxxxx>
---
 fs/squashfs/file.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/fs/squashfs/file.c b/fs/squashfs/file.c
index 12263ec8494b..39142c4e08c4 100644
--- a/fs/squashfs/file.c
+++ b/fs/squashfs/file.c
@@ -565,6 +565,7 @@ static int squashfs_readahead_fragment(struct inode *inode, struct page **page,
 	return 0;
 
 failed:
+	squashfs_finish_page(actor);
 	squashfs_page_actor_free(actor);
 
 out:

-- 
2.39.5