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diff --git a/sys/kern/kern_prot.c b/sys/kern/kern_prot.c
--- a/sys/kern/kern_prot.c
+++ b/sys/kern/kern_prot.c
@@ -2181,11 +2181,6 @@
bcopy(&src->cr_startcopy, &dest->cr_startcopy,
(unsigned)((caddr_t)&src->cr_endcopy -
(caddr_t)&src->cr_startcopy));
- /*
- * Avoid an assertion in crsetgroups() -> crextend(). To be removed as
- * 'cr_ngroups' is moved out of the bcopied area.
- */
- dest->cr_ngroups = 0;
dest->cr_flags = src->cr_flags;
crsetgroups(dest, src->cr_ngroups, src->cr_groups);
uihold(dest->cr_uidinfo);
diff --git a/sys/sys/ucred.h b/sys/sys/ucred.h
--- a/sys/sys/ucred.h
+++ b/sys/sys/ucred.h
@@ -72,20 +72,22 @@
u_int cr_users; /* (c) proc + thread using this cred */
u_int cr_flags; /* credential flags */
struct auditinfo_addr cr_audit; /* Audit properties. */
-#define cr_startcopy cr_uid
+#define cr_startcopy cr_ispare
+ u_int cr_ispare; /* spare integer */
+ gid_t cr_rgid; /* real group id */
+ gid_t cr_svgid; /* saved group id */
uid_t cr_uid; /* effective user id */
uid_t cr_ruid; /* real user id */
uid_t cr_svuid; /* saved user id */
- int cr_ngroups; /* number of groups */
- gid_t cr_rgid; /* real group id */
- gid_t cr_svgid; /* saved group id */
struct uidinfo *cr_uidinfo; /* per euid resource consumption */
struct uidinfo *cr_ruidinfo; /* per ruid resource consumption */
struct prison *cr_prison; /* jail(2) */
struct loginclass *cr_loginclass; /* login class */
- void *cr_pspare2[2]; /* general use 2 */
+ void *cr_pspare[1]; /* spare pointer */
#define cr_endcopy cr_label
struct label *cr_label; /* MAC label */
+ u_int cr_ispare2; /* spare integer */
+ int cr_ngroups; /* number of groups */
gid_t *cr_groups; /* groups */
int cr_agroups; /* Available groups */
/* storage for small groups */

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