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-rw-r--r--src/vnet/devices/virtio/vhost-user.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/src/vnet/devices/virtio/vhost-user.c b/src/vnet/devices/virtio/vhost-user.c
index 9b8c18882ca..c627dec2aa5 100644
--- a/src/vnet/devices/virtio/vhost-user.c
+++ b/src/vnet/devices/virtio/vhost-user.c
@@ -237,7 +237,8 @@ map_guest_mem (vhost_user_intf_t * vui, uword addr, u32 * hint)
r = _mm_blend_epi16 (r, _mm_and_si128 (rl, rh), 0x88);
r = _mm_shuffle_epi8 (r, _mm_set_epi64x (0, 0x0e060c040a020800));
- i = __builtin_ctzll (_mm_movemask_epi8 (r));
+ i = __builtin_ctzll (_mm_movemask_epi8 (r) |
+ (1 << VHOST_MEMORY_MAX_NREGIONS));
if (i < vui->nregions)
{