Replace the static NGROUPS=NGROUPS_MAX+1=1024 with a dynamic

kern.ngroups+1.  kern.ngroups can range from NGROUPS_MAX=1023 to
INT_MAX-1.  Given that the Windows group limit is 1024, this range
should be sufficient for most applications.

MFC after:	1 month

3 files changed, 3 insertions, 3 deletions

diff --git a/sys/compat/linux/linux_misc.c b/sys/compat/linux/linux_misc.c
index 1d5eaf8..7ea1243 100644
--- a/sys/compat/linux/linux_misc.c
+++ b/sys/compat/linux/linux_misc.c
@@ -1138,7 +1138,7 @@ linux_setgroups(struct thread *td, struct linux_setgroups_args *args)
 	struct proc *p;
 
 	ngrp = args->gidsetsize;
-	if (ngrp < 0 || ngrp >= NGROUPS)
+	if (ngrp < 0 || ngrp > ngroups_max)
 		return (EINVAL);
 	linux_gidset = malloc(ngrp * sizeof(*linux_gidset), M_TEMP, M_WAITOK);
 	error = copyin(args->grouplist, linux_gidset, ngrp * sizeof(l_gid_t));
diff --git a/sys/compat/linux/linux_uid16.c b/sys/compat/linux/linux_uid16.c
index b49bf78..7bbfc8d 100644
--- a/sys/compat/linux/linux_uid16.c
+++ b/sys/compat/linux/linux_uid16.c
@@ -109,7 +109,7 @@ linux_setgroups16(struct thread *td, struct linux_setgroups16_args *args)
 #endif
 
 	ngrp = args->gidsetsize;
-	if (ngrp < 0 || ngrp >= NGROUPS)
+	if (ngrp < 0 || ngrp > ngroups_max)
 		return (EINVAL);
 	linux_gidset = malloc(ngrp * sizeof(*linux_gidset), M_TEMP, M_WAITOK);
 	error = copyin(args->gidset, linux_gidset, ngrp * sizeof(l_gid16_t));
diff --git a/sys/compat/svr4/svr4_misc.c b/sys/compat/svr4/svr4_misc.c
index 62bd010..6f80fe6 100644
--- a/sys/compat/svr4/svr4_misc.c
+++ b/sys/compat/svr4/svr4_misc.c
@@ -708,7 +708,7 @@ svr4_sys_sysconfig(td, uap)
 
 	switch (uap->name) {
 	case SVR4_CONFIG_NGROUPS:
-		*retval = NGROUPS_MAX;
+		*retval = ngroups_max;
 		break;
 	case SVR4_CONFIG_CHILD_MAX:
 		*retval = maxproc;