On Mon, Jun 15, 2020 at 10:30:24PM +0200, gregkh@xxxxxxxxxxxxxxxxxxx wrote:
The patch below does not apply to the 5.4-stable tree.
If someone wants it applied there, or to any other stable or longterm
tree, then please email the backport, including the original git commit
id to <stable@xxxxxxxxxxxxxxx>.
thanks,
greg k-h
------------------ original commit in Linus's tree ------------------
From d90ca42012db2863a9a30b564a2ace6016594bda Mon Sep 17 00:00:00 2001
From: "Longpeng(Mike)" <longpeng2@xxxxxxxxxx>
Date: Tue, 2 Jun 2020 15:05:01 +0800
Subject: [PATCH] crypto: virtio: Fix dest length calculation in
__virtio_crypto_skcipher_do_req()
The src/dst length is not aligned with AES_BLOCK_SIZE(which is 16) in some
testcases in tcrypto.ko.
For example, the src/dst length of one of cts(cbc(aes))'s testcase is 17, the
crypto_virtio driver will set @src_data_len=16 but @dst_data_len=17 in this
case and get a wrong at then end.
SRC: pp pp pp pp pp pp pp pp pp pp pp pp pp pp pp pp pp (17 bytes)
EXP: cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc pp (17 bytes)
DST: cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc 00 (pollute the last bytes)
(pp: plaintext cc:ciphertext)
Fix this issue by limit the length of dest buffer.
Fixes: dbaf0624ffa5 ("crypto: add virtio-crypto driver")
Cc: Gonglei <arei.gonglei@xxxxxxxxxx>
Cc: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx>
Cc: "Michael S. Tsirkin" <mst@xxxxxxxxxx>
Cc: Jason Wang <jasowang@xxxxxxxxxx>
Cc: "David S. Miller" <davem@xxxxxxxxxxxxx>
Cc: virtualization@xxxxxxxxxxxxxxxxxxxxxxxxxx
Cc: linux-kernel@xxxxxxxxxxxxxxx
Cc: stable@xxxxxxxxxxxxxxx
Signed-off-by: Longpeng(Mike) <longpeng2@xxxxxxxxxx>
Link: https://lore.kernel.org/r/20200602070501.2023-4-longpeng2@xxxxxxxxxx
Signed-off-by: Michael S. Tsirkin <mst@xxxxxxxxxx>
Conflict due to missing eee1d6fca0a0 ("crypto: virtio - switch to
skcipher API"). I've fixed it and queued up for 5.4, 4.19, and 4.14.
--
Thanks,
Sasha
