1 files changed, 26 insertions, 6 deletions

diff --git a/hw/s390x/css.c b/hw/s390x/css.c
index 04ec5cc970..f92b046cd3 100644
--- a/hw/s390x/css.c
+++ b/hw/s390x/css.c
@@ -1290,9 +1290,19 @@ void copy_scsw_to_guest(SCSW *dest, const SCSW *src)
 static void copy_schib_to_guest(SCHIB *dest, const SCHIB *src)
 {
     int i;
-
-    copy_pmcw_to_guest(&dest->pmcw, &src->pmcw);
-    copy_scsw_to_guest(&dest->scsw, &src->scsw);
+    /*
+     * We copy the PMCW and SCSW in and out of local variables to
+     * avoid taking the address of members of a packed struct.
+     */
+    PMCW src_pmcw, dest_pmcw;
+    SCSW src_scsw, dest_scsw;
+
+    src_pmcw = src->pmcw;
+    copy_pmcw_to_guest(&dest_pmcw, &src_pmcw);
+    dest->pmcw = dest_pmcw;
+    src_scsw = src->scsw;
+    copy_scsw_to_guest(&dest_scsw, &src_scsw);
+    dest->scsw = dest_scsw;
     dest->mba = cpu_to_be64(src->mba);
     for (i = 0; i < ARRAY_SIZE(dest->mda); i++) {
         dest->mda[i] = src->mda[i];
@@ -1339,9 +1349,19 @@ static void copy_scsw_from_guest(SCSW *dest, const SCSW *src)
 static void copy_schib_from_guest(SCHIB *dest, const SCHIB *src)
 {
     int i;
-
-    copy_pmcw_from_guest(&dest->pmcw, &src->pmcw);
-    copy_scsw_from_guest(&dest->scsw, &src->scsw);
+    /*
+     * We copy the PMCW and SCSW in and out of local variables to
+     * avoid taking the address of members of a packed struct.
+     */
+    PMCW src_pmcw, dest_pmcw;
+    SCSW src_scsw, dest_scsw;
+
+    src_pmcw = src->pmcw;
+    copy_pmcw_from_guest(&dest_pmcw, &src_pmcw);
+    dest->pmcw = dest_pmcw;
+    src_scsw = src->scsw;
+    copy_scsw_from_guest(&dest_scsw, &src_scsw);
+    dest->scsw = dest_scsw;
     dest->mba = be64_to_cpu(src->mba);
     for (i = 0; i < ARRAY_SIZE(dest->mda); i++) {
         dest->mda[i] = src->mda[i];