Commit f3587d76 authored by Keith Busch's avatar Keith Busch Committed by Jens Axboe

block: Clear kernel memory before copying to user

If the kernel allocates a bounce buffer for user read data, this memory
needs to be cleared before copying it to the user, otherwise it may leak
kernel memory to user space.

Laurence Oberman <[email protected]>
Signed-off-by: Keith Busch's avatarKeith Busch <[email protected]>
Signed-off-by: default avatarJens Axboe <[email protected]>
parent e31d36b0
......@@ -1260,6 +1260,7 @@ struct bio *bio_copy_user_iov(struct request_queue *q,
if (ret)
goto cleanup;
} else {
zero_fill_bio(bio);
iov_iter_advance(iter, bio->bi_iter.bi_size);
}
......
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