This is a note to let you know that I've just added the patch titled
crypto: aesni - xts_crypt() return if walk.nbytes is 0
to the 5.14-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
crypto-aesni-xts_crypt-return-if-walk.nbytes-is-0.patch
and it can be found in the queue-5.14 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 72ff2bf04db2a48840df93a461b7115900f46c05 Mon Sep 17 00:00:00 2001
From: Shreyansh Chouhan <chouhan.shreyansh630@xxxxxxxxx>
Date: Sun, 22 Aug 2021 09:15:14 +0530
Subject: crypto: aesni - xts_crypt() return if walk.nbytes is 0
From: Shreyansh Chouhan <chouhan.shreyansh630@xxxxxxxxx>
commit 72ff2bf04db2a48840df93a461b7115900f46c05 upstream.
xts_crypt() code doesn't call kernel_fpu_end() after calling
kernel_fpu_begin() if walk.nbytes is 0. The correct behavior should be
not calling kernel_fpu_begin() if walk.nbytes is 0.
Reported-by: syzbot+20191dc583eff8602d2d@xxxxxxxxxxxxxxxxxxxxxxxxx
Signed-off-by: Shreyansh Chouhan <chouhan.shreyansh630@xxxxxxxxx>
Signed-off-by: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
arch/x86/crypto/aesni-intel_glue.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/arch/x86/crypto/aesni-intel_glue.c
+++ b/arch/x86/crypto/aesni-intel_glue.c
@@ -849,7 +849,7 @@ static int xts_crypt(struct skcipher_req
return -EINVAL;
err = skcipher_walk_virt(&walk, req, false);
- if (err)
+ if (!walk.nbytes)
return err;
if (unlikely(tail > 0 && walk.nbytes < walk.total)) {
Patches currently in stable-queue which might be from chouhan.shreyansh630@xxxxxxxxx are
queue-5.14/crypto-aesni-xts_crypt-return-if-walk.nbytes-is-0.patch
