[PATCH 2/3, V2] kernel: Move groups_sort to the caller of set_groups.

[Thiago Rafael Becker]

The responsibility for calling groups_sort is now on the caller
of set_groups.

Signed-off-by: Thiago Rafael Becker <thiago.bec...@gmail.com>
---
 kernel/groups.c           | 1 +
 kernel/uid16.c            | 1 +
 net/sunrpc/svcauth_unix.c | 7 +++++++
 3 files changed, 9 insertions(+)

diff --git a/kernel/groups.c b/kernel/groups.c
index 4c9c9ed..17073a9 100644
--- a/kernel/groups.c
+++ b/kernel/groups.c
@@ -208,6 +208,7 @@ SYSCALL_DEFINE2(setgroups, int, gidsetsize, gid_t __user *, 
grouplist)
                return retval;
        }
 
+       groups_sort(group_info);
        retval = set_current_groups(group_info);
        put_group_info(group_info);
 
diff --git a/kernel/uid16.c b/kernel/uid16.c
index ce74a49..ef1da2a 100644
--- a/kernel/uid16.c
+++ b/kernel/uid16.c
@@ -192,6 +192,7 @@ SYSCALL_DEFINE2(setgroups16, int, gidsetsize, old_gid_t 
__user *, grouplist)
                return retval;
        }
 
+       groups_sort(group_info);
        retval = set_current_groups(group_info);
        put_group_info(group_info);
 
diff --git a/net/sunrpc/svcauth_unix.c b/net/sunrpc/svcauth_unix.c
index f81eaa8..91e3d34 100644
--- a/net/sunrpc/svcauth_unix.c
+++ b/net/sunrpc/svcauth_unix.c
@@ -20,6 +20,7 @@
 
 
 #include "netns.h"
+void groups_sort(struct group_info *group_info);
 
 /*
  * AUTHUNIX and AUTHNULL credentials are both handled here.
@@ -520,6 +521,12 @@ static int unix_gid_parse(struct cache_detail *cd,
                ug.gi->gid[i] = kgid;
        }
 
+       /* Sort the groups before inserting this entry
+        * into the cache to avoid future corrutpions
+        * by multiple simultaneous attempts to sort this
+        * entry.
+        */
+       groups_sort(ug.gi);
        ugp = unix_gid_lookup(cd, uid);
        if (ugp) {
                struct cache_head *ch;
-- 
2.9.5