diff options
| author | Jérôme Glisse <jglisse@redhat.com> | 2019-04-10 16:23:53 -0400 |
|---|---|---|
| committer | Jérôme Glisse <jglisse@redhat.com> | 2019-04-10 17:05:57 -0400 |
| commit | 5f67db69fd9f95d12987d2a030a82bc390e05a71 (patch) | |
| tree | 03cec431e17c1f8c379ee1806151a15782901c41 | |
| parent | 6d4a63b438ac6efde8fdac1599d4690ac76f1168 (diff) | |
block: do not leak memory in bio_copy_user_iov()
When bio_add_pc_page() fails in bio_copy_user_iov() we should free
the page we just allocated otherwise we are leaking it.
Signed-off-by: Jérôme Glisse <jglisse@redhat.com>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: linux-block@vger.kernel.org
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: stable@vger.kernel.org
| -rw-r--r-- | block/bio.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/block/bio.c b/block/bio.c index b64cedc7f87c..716510ecd7ff 100644 --- a/block/bio.c +++ b/block/bio.c @@ -1298,8 +1298,11 @@ struct bio *bio_copy_user_iov(struct request_queue *q, } } - 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; |