cifs: Fix smbencrypt() to stop pointing a scatterlist at the stack

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smbencrypt() points a scatterlist to the stack, which is breaks if
CONFIG_VMAP_STACK=y.

Fix it by switching to crypto_cipher_encrypt_one().  The new code
should be considerably faster as an added benefit.

This code is nearly identical to some code that Eric Biggers
suggested.

Cc: stable@vger.kernel.org # 4.9 only
Reported-by: Eric Biggers <ebiggers3@gmail.com>
Signed-off-by: Andy Lutomirski <luto@kernel.org>
Acked-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steve French <smfrench@gmail.com>

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Andy Lutomirski 2016-12-12 12:54:37 -08:00 • committed by Steve French

parent 96a988ffeb

commit 06deeec77a

1 changed files with 8 additions and 32 deletions

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fs/cifs/smbencrypt.c

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