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authorEric W. Biederman <ebiederm@xmission.com>2011-11-15 03:56:38 +0400
committerEric W. Biederman <ebiederm@xmission.com>2012-05-03 14:27:21 +0400
commitae2975bc3476243b45a1e2344236d7920c268f38 (patch)
treee4b2a8472f6047734b6e7e2bdc994375b2790323 /net/ipv4/ping.c
parent22d917d80e842829d0ca0a561967d728eb1d6303 (diff)
downloadlinux-ae2975bc3476243b45a1e2344236d7920c268f38.tar.xz
userns: Convert group_info values from gid_t to kgid_t.
As a first step to converting struct cred to be all kuid_t and kgid_t values convert the group values stored in group_info to always be kgid_t values. Unless user namespaces are used this change should have no effect. Acked-by: Serge Hallyn <serge.hallyn@canonical.com> Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
Diffstat (limited to 'net/ipv4/ping.c')
-rw-r--r--net/ipv4/ping.c11
1 files changed, 8 insertions, 3 deletions
diff --git a/net/ipv4/ping.c b/net/ipv4/ping.c
index 50009c787bcd..9d3044ff45b9 100644
--- a/net/ipv4/ping.c
+++ b/net/ipv4/ping.c
@@ -205,17 +205,22 @@ static int ping_init_sock(struct sock *sk)
gid_t range[2];
struct group_info *group_info = get_current_groups();
int i, j, count = group_info->ngroups;
+ kgid_t low, high;
inet_get_ping_group_range_net(net, range, range+1);
+ low = make_kgid(&init_user_ns, range[0]);
+ high = make_kgid(&init_user_ns, range[1]);
+ if (!gid_valid(low) || !gid_valid(high) || gid_lt(high, low))
+ return -EACCES;
+
if (range[0] <= group && group <= range[1])
return 0;
for (i = 0; i < group_info->nblocks; i++) {
int cp_count = min_t(int, NGROUPS_PER_BLOCK, count);
-
for (j = 0; j < cp_count; j++) {
- group = group_info->blocks[i][j];
- if (range[0] <= group && group <= range[1])
+ kgid_t gid = group_info->blocks[i][j];
+ if (gid_lte(low, gid) && gid_lte(gid, high))
return 0;
}