From 94571065757a4f2619c48ab4e36cafdc635028ce Mon Sep 17 00:00:00 2001 From: Florian Westphal Date: Thu, 26 Jul 2007 00:05:07 -0700 Subject: [PATCH] [TIPC]: fix tipc_link_create error handling if printbuf allocation or tipc_node_attach_link() fails, invalid references to the link are left in the associated node and bearer structures. Fix by allocating printbuf early and moving timer initialization and the addition of the new link to the b_ptr->links list after tipc_node_attach_link() succeeded. Signed-off-by: Florian Westphal Signed-off-by: David S. Miller --- net/tipc/link.c | 28 +++++++++++++++------------- 1 file changed, 15 insertions(+), 13 deletions(-) diff --git a/net/tipc/link.c b/net/tipc/link.c index 5adfdfd49d61..1d674e0848fa 100644 --- a/net/tipc/link.c +++ b/net/tipc/link.c @@ -423,6 +423,17 @@ struct link *tipc_link_create(struct bearer *b_ptr, const u32 peer, return NULL; } + if (LINK_LOG_BUF_SIZE) { + char *pb = kmalloc(LINK_LOG_BUF_SIZE, GFP_ATOMIC); + + if (!pb) { + kfree(l_ptr); + warn("Link creation failed, no memory for print buffer\n"); + return NULL; + } + tipc_printbuf_init(&l_ptr->print_buf, pb, LINK_LOG_BUF_SIZE); + } + l_ptr->addr = peer; if_name = strchr(b_ptr->publ.name, ':') + 1; sprintf(l_ptr->name, "%u.%u.%u:%s-%u.%u.%u:", @@ -432,8 +443,6 @@ struct link *tipc_link_create(struct bearer *b_ptr, const u32 peer, tipc_zone(peer), tipc_cluster(peer), tipc_node(peer)); /* note: peer i/f is appended to link name by reset/activate */ memcpy(&l_ptr->media_addr, media_addr, sizeof(*media_addr)); - k_init_timer(&l_ptr->timer, (Handler)link_timeout, (unsigned long)l_ptr); - list_add_tail(&l_ptr->link_list, &b_ptr->links); l_ptr->checkpoint = 1; l_ptr->b_ptr = b_ptr; link_set_supervision_props(l_ptr, b_ptr->media->tolerance); @@ -459,21 +468,14 @@ struct link *tipc_link_create(struct bearer *b_ptr, const u32 peer, l_ptr->owner = tipc_node_attach_link(l_ptr); if (!l_ptr->owner) { + if (LINK_LOG_BUF_SIZE) + kfree(l_ptr->print_buf.buf); kfree(l_ptr); return NULL; } - if (LINK_LOG_BUF_SIZE) { - char *pb = kmalloc(LINK_LOG_BUF_SIZE, GFP_ATOMIC); - - if (!pb) { - kfree(l_ptr); - warn("Link creation failed, no memory for print buffer\n"); - return NULL; - } - tipc_printbuf_init(&l_ptr->print_buf, pb, LINK_LOG_BUF_SIZE); - } - + k_init_timer(&l_ptr->timer, (Handler)link_timeout, (unsigned long)l_ptr); + list_add_tail(&l_ptr->link_list, &b_ptr->links); tipc_k_signal((Handler)tipc_link_start, (unsigned long)l_ptr); dbg("tipc_link_create(): tolerance = %u,cont intv = %u, abort_limit = %u\n",