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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 <error27@gmail.com>
Signed-off-by: Or Gerlitz <ogerlitz@voltaire.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
This commit is contained in:
Dan Carpenter 2010-05-06 16:22:21 +03:00 committed by Roland Dreier
parent 39ff05dbbb
commit 9fda1ac5fa
1 changed files with 9 additions and 16 deletions
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25
drivers/infiniband/ulp/iser/iser_verbs.c
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@ -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, &params);
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;
}