Hi, 'pages' retrived by __bio_iov_iter_get_pages() may point to same page, and finally they can be merged to same page too in bio_add_page(), then page leak can be caused.
Fixes this issue by dropping the extra page ref. Ming Lei (2): block: introduce 'enum bvec_merge_flags' for __bio_try_merge_page block: fix page leak in case of merging to same page block/bio.c | 34 ++++++++++++++++++++++++---------- fs/iomap.c | 3 ++- fs/xfs/xfs_aops.c | 3 ++- include/linux/bio.h | 9 ++++++++- 4 files changed, 36 insertions(+), 13 deletions(-) Cc: David Gibson <[email protected]> Cc: "Darrick J. Wong" <[email protected]> Cc: [email protected] Cc: Alexander Viro <[email protected]> Cc: Christoph Hellwig <[email protected]> -- 2.20.1
