diff options
Diffstat (limited to 'net/ipv4/ping.c')
| -rw-r--r-- | net/ipv4/ping.c | 11 |
1 files changed, 8 insertions, 3 deletions
diff --git a/net/ipv4/ping.c b/net/ipv4/ping.c index 6e930c7174d..2c00e8bf684 100644 --- a/net/ipv4/ping.c +++ b/net/ipv4/ping.c @@ -207,17 +207,22 @@ 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; } |