This is a note to let you know that I've just added the patch titled
crypto: chacha20-ssse3 - Align stack pointer to 64 bytes
to the 4.3-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-chacha20-ssse3-align-stack-pointer-to-64-bytes.patch
and it can be found in the queue-4.3 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From cbe09bd51bf23b42c3a94c5fb6815e1397c5fc3f Mon Sep 17 00:00:00 2001
From: Eli Cooper <elicooper@xxxxxxx>
Date: Fri, 22 Jan 2016 00:24:08 +0800
Subject: crypto: chacha20-ssse3 - Align stack pointer to 64 bytes
From: Eli Cooper <elicooper@xxxxxxx>
commit cbe09bd51bf23b42c3a94c5fb6815e1397c5fc3f upstream.
This aligns the stack pointer in chacha20_4block_xor_ssse3 to 64 bytes.
Fixes general protection faults and potential kernel panics.
Signed-off-by: Eli Cooper <elicooper@xxxxxxx>
Acked-by: Martin Willi <martin@xxxxxxxxxxxxxx>
Signed-off-by: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
arch/x86/crypto/chacha20-ssse3-x86_64.S | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
--- a/arch/x86/crypto/chacha20-ssse3-x86_64.S
+++ b/arch/x86/crypto/chacha20-ssse3-x86_64.S
@@ -157,7 +157,9 @@ ENTRY(chacha20_4block_xor_ssse3)
# done with the slightly better performing SSSE3 byte shuffling,
# 7/12-bit word rotation uses traditional shift+OR.
- sub $0x40,%rsp
+ mov %rsp,%r11
+ sub $0x80,%rsp
+ and $~63,%rsp
# x0..15[0-3] = s0..3[0..3]
movq 0x00(%rdi),%xmm1
@@ -620,6 +622,6 @@ ENTRY(chacha20_4block_xor_ssse3)
pxor %xmm1,%xmm15
movdqu %xmm15,0xf0(%rsi)
- add $0x40,%rsp
+ mov %r11,%rsp
ret
ENDPROC(chacha20_4block_xor_ssse3)
Patches currently in stable-queue which might be from elicooper@xxxxxxx are
queue-4.3/crypto-chacha20-ssse3-align-stack-pointer-to-64-bytes.patch
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