From 9fda1ac5fa09c49e9148f85be14f55e2bb856c0f Mon Sep 17 00:00:00 2001 From: Dan Carpenter Date: Thu, 6 May 2010 16:22:21 +0300 Subject: [PATCH] IB/iser: Fix error flow in iser_create_ib_conn_res() We shouldn't free things here because we free them later. The call tree looks like this: iser_connect() ==> initiating the connection establishment and later iser_cma_handler() => iser_route_handler() => iser_create_ib_conn_res() if we fail here, eventually iser_conn_release() is called, resulting in a double free. Signed-off-by: Dan Carpenter Signed-off-by: Or Gerlitz Signed-off-by: Roland Dreier --- drivers/infiniband/ulp/iser/iser_verbs.c | 25 +++++++++--------------- 1 file changed, 9 insertions(+), 16 deletions(-) diff --git a/drivers/infiniband/ulp/iser/iser_verbs.c b/drivers/infiniband/ulp/iser/iser_verbs.c index 78fdecacea35..9876865732f7 100644 --- a/drivers/infiniband/ulp/iser/iser_verbs.c +++ b/drivers/infiniband/ulp/iser/iser_verbs.c @@ -163,10 +163,8 @@ static int iser_create_ib_conn_res(struct iser_conn *ib_conn) device = ib_conn->device; ib_conn->login_buf = kmalloc(ISER_RX_LOGIN_SIZE, GFP_KERNEL); - if (!ib_conn->login_buf) { - goto alloc_err; - ret = -ENOMEM; - } + if (!ib_conn->login_buf) + goto out_err; ib_conn->login_dma = ib_dma_map_single(ib_conn->device->ib_device, (void *)ib_conn->login_buf, ISER_RX_LOGIN_SIZE, @@ -175,10 +173,9 @@ static int iser_create_ib_conn_res(struct iser_conn *ib_conn) ib_conn->page_vec = kmalloc(sizeof(struct iser_page_vec) + (sizeof(u64) * (ISCSI_ISER_SG_TABLESIZE +1)), GFP_KERNEL); - if (!ib_conn->page_vec) { - ret = -ENOMEM; - goto alloc_err; - } + if (!ib_conn->page_vec) + goto out_err; + ib_conn->page_vec->pages = (u64 *) (ib_conn->page_vec + 1); params.page_shift = SHIFT_4K; @@ -198,7 +195,8 @@ static int iser_create_ib_conn_res(struct iser_conn *ib_conn) ib_conn->fmr_pool = ib_create_fmr_pool(device->pd, ¶ms); if (IS_ERR(ib_conn->fmr_pool)) { ret = PTR_ERR(ib_conn->fmr_pool); - goto fmr_pool_err; + ib_conn->fmr_pool = NULL; + goto out_err; } memset(&init_attr, 0, sizeof init_attr); @@ -216,7 +214,7 @@ static int iser_create_ib_conn_res(struct iser_conn *ib_conn) ret = rdma_create_qp(ib_conn->cma_id, device->pd, &init_attr); if (ret) - goto qp_err; + goto out_err; ib_conn->qp = ib_conn->cma_id->qp; iser_err("setting conn %p cma_id %p: fmr_pool %p qp %p\n", @@ -224,12 +222,7 @@ static int iser_create_ib_conn_res(struct iser_conn *ib_conn) ib_conn->fmr_pool, ib_conn->cma_id->qp); return ret; -qp_err: - (void)ib_destroy_fmr_pool(ib_conn->fmr_pool); -fmr_pool_err: - kfree(ib_conn->page_vec); - kfree(ib_conn->login_buf); -alloc_err: +out_err: iser_err("unable to alloc mem or create resource, err %d\n", ret); return ret; } -- 2.39.2