From: Jérôme Glisse jglisse@redhat.com
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: linux-block@vger.kernel.org Cc: Linus Torvalds torvalds@linux-foundation.org Cc: stable@vger.kernel.org Reviewed-by: Chaitanya Kulkarni chaitanya.kulkarni@wdc.com Signed-off-by: Jérôme Glisse jglisse@redhat.com Signed-off-by: Jens Axboe axboe@kernel.dk Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- block/bio.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-)
--- a/block/bio.c +++ b/block/bio.c @@ -1238,8 +1238,11 @@ 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;