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Subject[PATCH 2/3, v3] kernel: Move groups_sort to the caller of set_groups.
Date
The responsibility for calling groups_sort is now on the caller
of set_groups.

Signed-off-by: Thiago Rafael Becker <thiago.becker@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 740b67d..94e2ac0 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
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