Commit f55adad6 authored by Keith Busch's avatar Keith Busch Committed by Jens Axboe
Browse files

block/bio: Do not zero user pages

We don't need to zero fill the bio if not using kernel allocated pages.

Fixes: f3587d76

 ("block: Clear kernel memory before copying to user") # v4.20-rc2
Reported-by: default avatarTodd Aiken <taiken@mvtech.ca>
Cc: Laurence Oberman <loberman@redhat.com>
Cc: stable@vger.kernel.org
Cc: Bart Van Assche <bvanassche@acm.org>
Tested-by: default avatarLaurence Oberman <loberman@redhat.com>
Signed-off-by: default avatarKeith Busch <keith.busch@intel.com>
Signed-off-by: default avatarJens Axboe <axboe@kernel.dk>
parent 8b878ee2
...@@ -1261,7 +1261,8 @@ struct bio *bio_copy_user_iov(struct request_queue *q, ...@@ -1261,7 +1261,8 @@ struct bio *bio_copy_user_iov(struct request_queue *q,
if (ret) if (ret)
goto cleanup; goto cleanup;
} else { } else {
zero_fill_bio(bio); if (bmd->is_our_pages)
zero_fill_bio(bio);
iov_iter_advance(iter, bio->bi_iter.bi_size); iov_iter_advance(iter, bio->bi_iter.bi_size);
} }
......
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