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crypto: chacha20-ssse3 - Align stack pointer to 64 bytes

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commit cbe09bd51b 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@gmx.com>
Acked-by: Martin Willi <martin@strongswan.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Eli Cooper 2016-01-22 00:24:08 +08:00 committed by Greg Kroah-Hartman
parent 2a6c3d5457
commit 936a322b57
1 changed files with 4 additions and 2 deletions
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6
arch/x86/crypto/chacha20-ssse3-x86_64.S
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@ -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)