1 files changed, 7 insertions, 0 deletions

diff --git a/drivers/md/dm-crypt.c b/drivers/md/dm-crypt.c
index eedba67b0e3e..d609566c19b0 100644
--- a/drivers/md/dm-crypt.c
+++ b/drivers/md/dm-crypt.c
@@ -1924,6 +1924,13 @@ static int crypt_map(struct dm_target *ti, struct bio *bio)
                 return DM_MAPIO_REMAPPED;
         }
 
+        /*
+         * Check if bio is too large, split as needed.
+         */
+        if (unlikely(bio->bi_iter.bi_size > (BIO_MAX_PAGES << PAGE_SHIFT)) &&
+            bio_data_dir(bio) == WRITE)
+                dm_accept_partial_bio(bio, ((BIO_MAX_PAGES << PAGE_SHIFT) >> SECTOR_SHIFT));
+
         io = dm_per_bio_data(bio, cc->per_bio_data_size);
         crypt_io_init(io, cc, bio, dm_target_offset(ti, bio->bi_iter.bi_sector));
         io->ctx.req = (struct skcipher_request *)(io + 1);