From: Jérôme Glisse <[email protected]> commit a3761c3c91209b58b6f33bf69dd8bb8ec0c9d925 upstream.
When bio_add_pc_page() fails in bio_copy_user_iov() we should free the page we just allocated otherwise we are leaking it. Cc: [email protected] Cc: Linus Torvalds <[email protected]> Cc: [email protected] Reviewed-by: Chaitanya Kulkarni <[email protected]> Signed-off-by: Jérôme Glisse <[email protected]> Signed-off-by: Jens Axboe <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]> --- block/bio.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) --- a/block/bio.c +++ b/block/bio.c @@ -1240,8 +1240,11 @@ struct bio *bio_copy_user_iov(struct req } } - if (bio_add_pc_page(q, bio, page, bytes, offset) < bytes) + if (bio_add_pc_page(q, bio, page, bytes, offset) < bytes) { + if (!map_data) + __free_page(page); break; + } len -= bytes; offset = 0;
