From b04c46190219a4f845e46a459e3102137b7f6cac Mon Sep 17 00:00:00 2001 From: "Wang, Xiaoming" Date: Mon, 14 Apr 2014 12:30:45 -0400 Subject: [PATCH] net: ipv4: current group_info should be put after using. Plug a group_info refcount leak in ping_init. group_info is only needed during initialization and the code failed to release the reference on exit. While here move grabbing the reference to a place where it is actually needed. Signed-off-by: Chuansheng Liu Signed-off-by: Zhang Dongxing Signed-off-by: xiaoming wang Signed-off-by: David S. Miller --- net/ipv4/ping.c | 15 +++++++++++---- 1 file changed, 11 insertions(+), 4 deletions(-) diff --git a/net/ipv4/ping.c b/net/ipv4/ping.c index f4b19e5dde54..8210964a9f19 100644 --- a/net/ipv4/ping.c +++ b/net/ipv4/ping.c @@ -252,26 +252,33 @@ int ping_init_sock(struct sock *sk) { struct net *net = sock_net(sk); kgid_t group = current_egid(); - struct group_info *group_info = get_current_groups(); - int i, j, count = group_info->ngroups; + struct group_info *group_info; + int i, j, count; kgid_t low, high; + int ret = 0; inet_get_ping_group_range_net(net, &low, &high); if (gid_lte(low, group) && gid_lte(group, high)) return 0; + group_info = get_current_groups(); + count = group_info->ngroups; 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++) { kgid_t gid = group_info->blocks[i][j]; if (gid_lte(low, gid) && gid_lte(gid, high)) - return 0; + goto out_release_group; } count -= cp_count; } - return -EACCES; + ret = -EACCES; + +out_release_group: + put_group_info(group_info); + return ret; } EXPORT_SYMBOL_GPL(ping_init_sock); -- 2.30.2