1 files changed, 33 insertions, 0 deletions
diff --git a/target/linux/generic/backport-5.4/080-wireguard-0066-crypto-x86-poly1305-add-back-a-needed-assignment.patch b/target/linux/generic/backport-5.4/080-wireguard-0066-crypto-x86-poly1305-add-back-a-needed-assignment.patch
new file mode 100644
index 0000000000..aebedb0282
--- /dev/null
+++ b/target/linux/generic/backport-5.4/080-wireguard-0066-crypto-x86-poly1305-add-back-a-needed-assignment.patch
@@ -0,0 +1,33 @@
+From 4849474f7e021d0d2e33a008abf93cacebf812f4 Mon Sep 17 00:00:00 2001
+From: Eric Biggers <ebiggers@google.com>
+Date: Fri, 23 Oct 2020 15:27:48 -0700
+Subject: [PATCH 066/124] crypto: x86/poly1305 - add back a needed assignment
+
+commit c3a98c3ad5c0dc60a1ac66bf91147a3f39cac96b upstream.
+
+One of the assignments that was removed by commit 4a0c1de64bf9 ("crypto:
+x86/poly1305 - Remove assignments with no effect") is actually needed,
+since it affects the return value.
+
+This fixes the following crypto self-test failure:
+
+    alg: shash: poly1305-simd test failed (wrong result) on test vector 2, cfg="init+update+final aligned buffer"
+
+Fixes: 4a0c1de64bf9 ("crypto: x86/poly1305 - Remove assignments with no effect")
+Signed-off-by: Eric Biggers <ebiggers@google.com>
+Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
+Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
+---
+ arch/x86/crypto/poly1305_glue.c | 1 +
+ 1 file changed, 1 insertion(+)
+
+--- a/arch/x86/crypto/poly1305_glue.c
++++ b/arch/x86/crypto/poly1305_glue.c
+@@ -157,6 +157,7 @@ static unsigned int crypto_poly1305_setd
+ 			dctx->s[1] = get_unaligned_le32(&inp[4]);
+ 			dctx->s[2] = get_unaligned_le32(&inp[8]);
+ 			dctx->s[3] = get_unaligned_le32(&inp[12]);
++			acc += POLY1305_BLOCK_SIZE;
+ 			dctx->sset = true;
+ 		}
+ 	}