From: Gao feng Date: Wed, 4 Jul 2012 23:28:40 +0000 (+0000) Subject: cgroup: fix panic in netprio_cgroup X-Git-Tag: v3.5~24^2~28 X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=b761c9b1f4f69eb53fb6147547a1ab25237a93b3;p=pandora-kernel.git cgroup: fix panic in netprio_cgroup we set max_prioidx to the first zero bit index of prioidx_map in function get_prioidx. So when we delete the low index netprio cgroup and adding a new netprio cgroup again,the max_prioidx will be set to the low index. when we set the high index cgroup's net_prio.ifpriomap,the function write_priomap will call update_netdev_tables to alloc memory which size is sizeof(struct netprio_map) + sizeof(u32) * (max_prioidx + 1), so the size of array that map->priomap point to is max_prioidx +1, which is low than what we actually need. fix this by adding check in get_prioidx,only set max_prioidx when max_prioidx low than the new prioidx. Signed-off-by: Gao feng Acked-by: Neil Horman Signed-off-by: David S. Miller --- Reading git-diff-tree failed