This code calls folio_put() on an error pointer which will lead to a
crash. Check for both error pointers and NULL pointers before calling
folio_put().
Fixes: 5eea586b47f0 ("ext4: convert bd_buddy_page to bd_buddy_folio")
Signed-off-by: Dan Carpenter <dan.carpenter@linaro.org>
Link: https://lore.kernel.org/r/eaafa1d9-a61c-4af4-9f97-d3ad72c60200@moroto.mountain
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
return 0;
err:
- if (folio)
+ if (!IS_ERR_OR_NULL(folio))
folio_put(folio);
if (e4b->bd_bitmap_folio)
folio_put(e4b->bd_bitmap_folio);