diff --git a/crypto/hrss/asm/poly_rq_mul.S b/crypto/hrss/asm/poly_rq_mul.S
index 53ce47c..c37d7d0 100644
--- a/crypto/hrss/asm/poly_rq_mul.S
+++ b/crypto/hrss/asm/poly_rq_mul.S
@@ -26,23 +26,6 @@
 # This file was generated by poly_rq_mul.py
 .text
 .align 32
-mask_low9words:
-.word 0xffff
-.word 0xffff
-.word 0xffff
-.word 0xffff
-.word 0xffff
-.word 0xffff
-.word 0xffff
-.word 0xffff
-.word 0xffff
-.word 0x0
-.word 0x0
-.word 0x0
-.word 0x0
-.word 0x0
-.word 0x0
-.word 0x0
 const3:
 .word 3
 .word 3
@@ -746,8 +729,20 @@
 vmovdqu 1120(%rsi), %ymm4
 vmovdqu 1208(%rsi), %ymm5
 vmovdqu 1296(%rsi), %ymm6
-vmovdqu 1384(%rsi), %ymm7
-vpand mask_low9words(%rip), %ymm7, %ymm7
+
+# Only 18 bytes more can be read, but vmovdqu reads 32.
+# Copy 18 bytes to the red zone and zero pad to 32 bytes.
+xor %r9, %r9
+movq %r9, -16(%rsp)
+movq %r9, -8(%rsp)
+movq 1384(%rsi), %r9
+movq %r9, -32(%rsp)
+movq 1384+8(%rsi), %r9
+movq %r9, -24(%rsp)
+movw 1384+16(%rsi), %r9w
+movw %r9w, -16(%rsp)
+vmovdqu -32(%rsp), %ymm7
+
 vmovdqu 416(%rsi), %ymm8
 vmovdqu 504(%rsi), %ymm9
 vmovdqu 592(%rsi), %ymm10
@@ -1341,8 +1336,20 @@
 vmovdqu 1120(%rdx), %ymm4
 vmovdqu 1208(%rdx), %ymm5
 vmovdqu 1296(%rdx), %ymm6
-vmovdqu 1384(%rdx), %ymm7
-vpand mask_low9words(%rip), %ymm7, %ymm7
+
+# Only 18 bytes more can be read, but vmovdqu reads 32.
+# Copy 18 bytes to the red zone and zero pad to 32 bytes.
+xor %r9, %r9
+movq %r9, -16(%rsp)
+movq %r9, -8(%rsp)
+movq 1384(%rdx), %r9
+movq %r9, -32(%rsp)
+movq 1384+8(%rdx), %r9
+movq %r9, -24(%rsp)
+movw 1384+16(%rdx), %r9w
+movw %r9w, -16(%rsp)
+vmovdqu -32(%rsp), %ymm7
+
 vmovdqu 416(%rdx), %ymm8
 vmovdqu 504(%rdx), %ymm9
 vmovdqu 592(%rdx), %ymm10
@@ -8295,7 +8302,20 @@
 vmovdqa %ymm8, 2880(%r8)
 vmovdqu 680(%rdi), %ymm8
 vmovdqu 1032(%rdi), %ymm10
-vmovdqu 1384(%rdi), %ymm2
+
+# Only 18 bytes can be read at 1384, but vmovdqu reads 32.
+# Copy 18 bytes to the red zone and zero pad to 32 bytes.
+xor %r9, %r9
+movq %r9, -16(%rsp)
+movq %r9, -8(%rsp)
+movq 1384(%rdi), %r9
+movq %r9, -32(%rsp)
+movq 1384+8(%rdi), %r9
+movq %r9, -24(%rsp)
+movw 1384+16(%rdi), %r9w
+movw %r9w, -16(%rsp)
+vmovdqu -32(%rsp), %ymm2
+
 vpaddw %ymm5, %ymm8, %ymm5
 vpaddw %ymm6, %ymm10, %ymm6
 vpaddw %ymm4, %ymm2, %ymm4