From: Akinobu Mita Date: Tue, 29 Aug 2006 09:15:24 +0000 (-0700) Subject: [NETLINK]: Call panic if nl_table allocation fails X-Git-Tag: MMI-PSA29.97-13-9~47780^2~2 X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=fab2caf62ed03d83bd3a3598b859c3c345a8e8b5;p=GitHub%2FMotorolaMobilityLLC%2Fkernel-slsi.git [NETLINK]: Call panic if nl_table allocation fails This patch makes crash happen if initialization of nl_table fails in initcalls. It is better than getting use after free crash later. Signed-off-by: Akinobu Mita Signed-off-by: David S. Miller --- diff --git a/net/netlink/af_netlink.c b/net/netlink/af_netlink.c index b85c1f9f1288..8b85036ba8e3 100644 --- a/net/netlink/af_netlink.c +++ b/net/netlink/af_netlink.c @@ -1273,8 +1273,7 @@ netlink_kernel_create(int unit, unsigned int groups, struct netlink_sock *nlk; unsigned long *listeners = NULL; - if (!nl_table) - return NULL; + BUG_ON(!nl_table); if (unit<0 || unit>=MAX_LINKS) return NULL; @@ -1745,11 +1744,8 @@ static int __init netlink_proto_init(void) netlink_skb_parms_too_large(); nl_table = kcalloc(MAX_LINKS, sizeof(*nl_table), GFP_KERNEL); - if (!nl_table) { -enomem: - printk(KERN_CRIT "netlink_init: Cannot allocate nl_table\n"); - return -ENOMEM; - } + if (!nl_table) + goto panic; if (num_physpages >= (128 * 1024)) max = num_physpages >> (21 - PAGE_SHIFT); @@ -1769,7 +1765,7 @@ enomem: nl_pid_hash_free(nl_table[i].hash.table, 1 * sizeof(*hash->table)); kfree(nl_table); - goto enomem; + goto panic; } memset(hash->table, 0, 1 * sizeof(*hash->table)); hash->max_shift = order; @@ -1786,6 +1782,8 @@ enomem: rtnetlink_init(); out: return err; +panic: + panic("netlink_init: Cannot allocate nl_table\n"); } core_initcall(netlink_proto_init);