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authorAndy Polyakov <appro@openssl.org>2016-11-06 18:33:17 +0100
committerMatt Caswell <matt@openssl.org>2016-11-10 10:33:21 +0000
commit2fac86d9abeaa643677d1ffd0a139239fdf9406a (patch)
tree4ad5fe3df2298d086f1f631c5f6f576ad6452c9e
parentdca2e0ee1745ed2d9cba8c29f334f881a58f85dc (diff)
bn/asm/x86_64-mont.pl: fix for CVE-2016-7055 (Low severity).
Reviewed-by: Rich Salz <rsalz@openssl.org>
-rwxr-xr-xcrypto/bn/asm/x86_64-mont.pl5
1 files changed, 2 insertions, 3 deletions
diff --git a/crypto/bn/asm/x86_64-mont.pl b/crypto/bn/asm/x86_64-mont.pl
index 0451fef12e..df4cca5bfe 100755
--- a/crypto/bn/asm/x86_64-mont.pl
+++ b/crypto/bn/asm/x86_64-mont.pl
@@ -1157,18 +1157,17 @@ $code.=<<___;
mulx 2*8($aptr),%r15,%r13 # ...
adox -3*8($tptr),%r11
adcx %r15,%r12
- adox $zero,%r12
+ adox -2*8($tptr),%r12
adcx $zero,%r13
+ adox $zero,%r13
mov $bptr,8(%rsp) # off-load &b[i]
- .byte 0x67
mov $mi,%r15
imulq 24(%rsp),$mi # "t[0]"*n0
xor %ebp,%ebp # xor $zero,$zero # cf=0, of=0
mulx 3*8($aptr),%rax,%r14
mov $mi,%rdx
- adox -2*8($tptr),%r12
adcx %rax,%r13
adox -1*8($tptr),%r13
adcx $zero,%r14