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Groups > linux.kernel > #1583997
| From | SF Markus Elfring <elfring@users.sourceforge.net> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | [PATCH 28/29] IB/mlx5: Less function calls in create_kernel_qp() after error detection |
| Date | 2017-02-18 22:20 +0100 |
| Message-ID | <tckAa-73M-15@gated-at.bofh.it> (permalink) |
| References | <tck77-6Ef-3@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
From: Markus Elfring <elfring@users.sourceforge.net>
Date: Sat, 18 Feb 2017 21:00:50 +0100
The kfree() function was called in up to five cases
by the create_kernel_qp() function during error handling
even if the passed data structure member contained a null pointer.
* Adjust jump targets according to the Linux coding style convention.
* Split a condition check for memory allocation failures so that
each pointer from these function calls will be checked immediately.
See also background information:
Topic "CWE-754: Improper check for unusual or exceptional conditions"
Link: https://cwe.mitre.org/data/definitions/754.html
Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
---
drivers/infiniband/hw/mlx5/qp.c | 43 ++++++++++++++++++++++++++---------------
1 file changed, 27 insertions(+), 16 deletions(-)
diff --git a/drivers/infiniband/hw/mlx5/qp.c b/drivers/infiniband/hw/mlx5/qp.c
index e6e9b468b206..c47afce5fc6a 100644
--- a/drivers/infiniband/hw/mlx5/qp.c
+++ b/drivers/infiniband/hw/mlx5/qp.c
@@ -930,7 +930,7 @@ static int create_kernel_qp(struct mlx5_ib_dev *dev,
*in = mlx5_vzalloc(*inlen);
if (!*in) {
err = -ENOMEM;
- goto err_buf;
+ goto free_buffer;
}
qpc = MLX5_ADDR_OF(create_qp_in, *in, qpc);
@@ -952,45 +952,56 @@ static int create_kernel_qp(struct mlx5_ib_dev *dev,
err = mlx5_db_alloc(dev->mdev, &qp->db);
if (err) {
mlx5_ib_dbg(dev, "err %d\n", err);
- goto err_free;
+ goto vfree_in;
}
qp->sq.wrid = kmalloc_array(qp->sq.wqe_cnt,
sizeof(*qp->sq.wrid),
GFP_KERNEL);
+ if (!qp->sq.wrid)
+ goto free_db;
+
qp->sq.wr_data = kmalloc_array(qp->sq.wqe_cnt,
sizeof(*qp->sq.wr_data),
GFP_KERNEL);
+ if (!qp->sq.wr_data)
+ goto free_sq_wrid;
+
qp->rq.wrid = kmalloc_array(qp->rq.wqe_cnt,
sizeof(*qp->rq.wrid),
GFP_KERNEL);
+ if (!qp->rq.wrid)
+ goto free_sq_wr_data;
+
qp->sq.w_list = kmalloc_array(qp->sq.wqe_cnt,
sizeof(*qp->sq.w_list),
GFP_KERNEL);
+ if (!qp->sq.w_list)
+ goto free_rq_wrid;
+
qp->sq.wqe_head = kmalloc_array(qp->sq.wqe_cnt,
sizeof(*qp->sq.wqe_head),
GFP_KERNEL);
- if (!qp->sq.wrid || !qp->sq.wr_data || !qp->rq.wrid ||
- !qp->sq.w_list || !qp->sq.wqe_head) {
- err = -ENOMEM;
- goto err_wrid;
- }
+ if (!qp->sq.wqe_head)
+ goto free_sq_w_list;
+
qp->create_type = MLX5_QP_KERNEL;
return 0;
-
-err_wrid:
- kfree(qp->sq.wqe_head);
+free_sq_w_list:
kfree(qp->sq.w_list);
- kfree(qp->sq.wrid);
- kfree(qp->sq.wr_data);
+free_rq_wrid:
kfree(qp->rq.wrid);
+free_sq_wr_data:
+ kfree(qp->sq.wr_data);
+free_sq_wrid:
+ kfree(qp->sq.wrid);
+free_db:
mlx5_db_free(dev->mdev, &qp->db);
-
-err_free:
+ err = -ENOMEM;
+vfree_in:
kvfree(*in);
-
-err_buf:
+free_buffer:
mlx5_buf_free(dev->mdev, &qp->buf);
return err;
}
--
2.11.1
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[PATCH 00/29] IB/mlx: Fine-tuning for several function implementations SF Markus Elfring <elfring@users.sourceforge.net> - 2017-02-18 21:50 +0100
[PATCH 04/29] IB/mlx4: Improve another size determination in alloc_pv_object() SF Markus Elfring <elfring@users.sourceforge.net> - 2017-02-18 22:00 +0100
Re: [PATCH 04/29] IB/mlx4: Improve another size determination in alloc_pv_object() Majd Dibbiny <majd@mellanox.com> - 2017-02-19 18:10 +0100
[PATCH 01/29] IB/mlx4: Use kcalloc() in mlx4_ib_alloc_pv_bufs() SF Markus Elfring <elfring@users.sourceforge.net> - 2017-02-18 22:00 +0100
Re: [PATCH 01/29] IB/mlx4: Use kcalloc() in mlx4_ib_alloc_pv_bufs() Majd Dibbiny <majd@mellanox.com> - 2017-02-19 18:10 +0100
[PATCH 09/29] IB/mlx4: Move an assignment out of a check in forward_trap() SF Markus Elfring <elfring@users.sourceforge.net> - 2017-02-18 22:00 +0100
Re: [PATCH 09/29] IB/mlx4: Move an assignment out of a check in forward_trap() Majd Dibbiny <majd@mellanox.com> - 2017-02-19 18:20 +0100
[PATCH 03/29] IB/mlx4: Improve another size determination in mlx4_ib_alloc_demux_ctx() SF Markus Elfring <elfring@users.sourceforge.net> - 2017-02-18 22:00 +0100
Re: [PATCH 03/29] IB/mlx4: Improve another size determination in mlx4_ib_alloc_demux_ctx() Majd Dibbiny <majd@mellanox.com> - 2017-02-19 18:10 +0100
[PATCH 06/29] IB/mlx4: Delete three unnecessary return statements SF Markus Elfring <elfring@users.sourceforge.net> - 2017-02-18 22:00 +0100
Re: [PATCH 06/29] IB/mlx4: Delete three unnecessary return statements Majd Dibbiny <majd@mellanox.com> - 2017-02-19 18:10 +0100
[PATCH 05/29] IB/mlx4: Fix a typo in a comment line SF Markus Elfring <elfring@users.sourceforge.net> - 2017-02-18 22:00 +0100
Re: [PATCH 05/29] IB/mlx4: Fix a typo in a comment line Majd Dibbiny <majd@mellanox.com> - 2017-02-19 18:10 +0100
[PATCH 07/29] IB/mlx4: Split a condition check in handle_slaves_guid_change() SF Markus Elfring <elfring@users.sourceforge.net> - 2017-02-18 22:00 +0100
Re: [PATCH 07/29] IB/mlx4: Split a condition check in handle_slaves_guid_change() Majd Dibbiny <majd@mellanox.com> - 2017-02-19 18:10 +0100
[PATCH 10/29] IB/mlx4: Enclose 15 expressions for the sizeof operator by parentheses SF Markus Elfring <elfring@users.sourceforge.net> - 2017-02-18 22:00 +0100
Re: [PATCH 10/29] IB/mlx4: Enclose 15 expressions for the sizeof operator by parentheses Majd Dibbiny <majd@mellanox.com> - 2017-02-19 18:30 +0100
[PATCH 15/29] IB/mlx4: Delete an unnecessary return statement in do_slave_init() SF Markus Elfring <elfring@users.sourceforge.net> - 2017-02-18 22:10 +0100
Re: [PATCH 15/29] IB/mlx4: Delete an unnecessary return statement in do_slave_init() Majd Dibbiny <majd@mellanox.com> - 2017-02-19 23:40 +0100
[PATCH 11/29] IB/mlx4: Use kmalloc_array() in three functions SF Markus Elfring <elfring@users.sourceforge.net> - 2017-02-18 22:10 +0100
Re: [PATCH 11/29] IB/mlx4: Use kmalloc_array() in three functions Majd Dibbiny <majd@mellanox.com> - 2017-02-19 18:30 +0100
[PATCH 13/29] IB/mlx4: Split a condition check in five functions SF Markus Elfring <elfring@users.sourceforge.net> - 2017-02-18 22:10 +0100
Re: [PATCH 13/29] IB/mlx4: Split a condition check in five functions Majd Dibbiny <majd@mellanox.com> - 2017-02-19 18:30 +0100
[PATCH 12/29] IB/mlx4: Enclose 17 expressions for the sizeof operator by parentheses SF Markus Elfring <elfring@users.sourceforge.net> - 2017-02-18 22:10 +0100
Re: [PATCH 12/29] IB/mlx4: Enclose 17 expressions for the sizeof operator by parentheses Majd Dibbiny <majd@mellanox.com> - 2017-02-19 18:30 +0100
[PATCH 18/29] IB/mlx4: Delete an unnecessary variable initialisation in mlx4_ib_add() SF Markus Elfring <elfring@users.sourceforge.net> - 2017-02-18 22:10 +0100
[PATCH 19/29] IB/mlx4: Delete an unnecessary variable assignment in mlx4_ib_add() SF Markus Elfring <elfring@users.sourceforge.net> - 2017-02-18 22:10 +0100
Re: [PATCH 19/29] IB/mlx4: Delete an unnecessary variable assignment in mlx4_ib_add() Majd Dibbiny <majd@mellanox.com> - 2017-02-19 20:50 +0100
[PATCH 14/29] IB/mlx4: Delete an unnecessary variable in __mlx4_ib_query_gid() SF Markus Elfring <elfring@users.sourceforge.net> - 2017-02-18 22:10 +0100
[PATCH 17/29] IB/mlx4: Improve another size determination in mlx4_ib_add() SF Markus Elfring <elfring@users.sourceforge.net> - 2017-02-18 22:10 +0100
Re: [PATCH 17/29] IB/mlx4: Improve another size determination in mlx4_ib_add() Majd Dibbiny <majd@mellanox.com> - 2017-02-19 18:40 +0100
Re: [PATCH 17/29] IB/mlx4: Improve another size determination in mlx4_ib_add() Majd Dibbiny <majd@mellanox.com> - 2017-02-19 18:40 +0100
[PATCH 22/29] IB/mlx4: Use kmalloc_array() in alloc_proxy_bufs() SF Markus Elfring <elfring@users.sourceforge.net> - 2017-02-18 22:20 +0100
Re: [PATCH 22/29] IB/mlx4: Use kmalloc_array() in alloc_proxy_bufs() Majd Dibbiny <majd@mellanox.com> - 2017-02-19 21:00 +0100
[PATCH 20/29] IB/mlx4: Delete an error message for a failed memory allocation in mlx4_ib_add() SF Markus Elfring <elfring@users.sourceforge.net> - 2017-02-18 22:20 +0100
Re: [PATCH 20/29] IB/mlx4: Delete an error message for a failed memory allocation in mlx4_ib_add() Majd Dibbiny <majd@mellanox.com> - 2017-02-19 20:50 +0100
[PATCH 21/29] IB/mlx4: Delete unnecessary braces in mlx4_ib_add() SF Markus Elfring <elfring@users.sourceforge.net> - 2017-02-18 22:20 +0100
Re: [PATCH 21/29] IB/mlx4: Delete unnecessary braces in mlx4_ib_add() Majd Dibbiny <majd@mellanox.com> - 2017-02-19 21:10 +0100
[PATCH 29/29] IB/mlx5: Use kmalloc_array() in create_srq_kernel() SF Markus Elfring <elfring@users.sourceforge.net> - 2017-02-18 22:20 +0100
[PATCH 24/29] IB/mlx4: Delete unwanted spaces behind usages of the sizeof operator SF Markus Elfring <elfring@users.sourceforge.net> - 2017-02-18 22:20 +0100
[PATCH 28/29] IB/mlx5: Less function calls in create_kernel_qp() after error detection SF Markus Elfring <elfring@users.sourceforge.net> - 2017-02-18 22:20 +0100
[PATCH 27/29] IB/mlx5: Use kmalloc_array() in create_kernel_qp() SF Markus Elfring <elfring@users.sourceforge.net> - 2017-02-18 22:20 +0100
[PATCH 23/29] IB/mlx4: Improve size determinations in create_qp_common() SF Markus Elfring <elfring@users.sourceforge.net> - 2017-02-18 22:20 +0100
Re: [PATCH 23/29] IB/mlx4: Improve size determinations in create_qp_common() Majd Dibbiny <majd@mellanox.com> - 2017-02-19 21:00 +0100
[PATCH 16/29] IB/mlx4: Improve another size determination in do_slave_init() SF Markus Elfring <elfring@users.sourceforge.net> - 2017-02-18 22:20 +0100
[PATCH 08/29] IB/mlx4: Delete an unnecessary check before the function call "kfree" in free_pv_object() SF Markus Elfring <elfring@users.sourceforge.net> - 2017-02-18 22:30 +0100
Re: [PATCH 08/29] IB/mlx4: Delete an unnecessary check before the function call "kfree" in free_pv_object() Majd Dibbiny <majd@mellanox.com> - 2017-02-19 18:20 +0100
[PATCH 26/29] IB/mlx4: Enclose 14 expressions for the sizeof operator by parentheses SF Markus Elfring <elfring@users.sourceforge.net> - 2017-02-18 22:30 +0100
[PATCH 25/29] IB/mlx4: Add spaces for better code readability SF Markus Elfring <elfring@users.sourceforge.net> - 2017-02-18 22:50 +0100
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