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author | Or Har-Toov <ohartoov@nvidia.com> | 2022-11-28 13:52:45 +0200 |
---|---|---|
committer | Leon Romanovsky <leon@kernel.org> | 2022-11-30 10:33:12 +0200 |
commit | 67e6272d53386f9708f91c4d0015c4a1c470eef5 (patch) | |
tree | 669df735b6f176c2cea198458e0beebd3db2b4d0 /drivers/infiniband/core | |
parent | 2d6c66f5253e7d168a76048d18e1209c52f98a2b (diff) | |
download | linux-67e6272d53386f9708f91c4d0015c4a1c470eef5.tar.gz linux-67e6272d53386f9708f91c4d0015c4a1c470eef5.tar.bz2 linux-67e6272d53386f9708f91c4d0015c4a1c470eef5.zip |
RDMA/nldev: Add NULL check to silence false warnings
Using nlmsg_put causes static analysis tools to many
false positives of not checking the return value of nlmsg_put.
In all uses in nldev.c, payload parameter is 0 so NULL will never
be returned. So let's add useless checks to silence the warnings.
Signed-off-by: Or Har-Toov <ohartoov@nvidia.com>
Reviewed-by: Michael Guralnik <michaelgur@nvidia.com>
Link: https://lore.kernel.org/r/bd924da89d5b4f5291a4a01d9b5ae47c0a9b6a3f.1669636336.git.leonro@nvidia.com
Signed-off-by: Leon Romanovsky <leon@kernel.org>
Diffstat (limited to 'drivers/infiniband/core')
-rw-r--r-- | drivers/infiniband/core/nldev.c | 44 |
1 files changed, 36 insertions, 8 deletions
diff --git a/drivers/infiniband/core/nldev.c b/drivers/infiniband/core/nldev.c index ca0ed7d14326..b4716cda65d8 100644 --- a/drivers/infiniband/core/nldev.c +++ b/drivers/infiniband/core/nldev.c @@ -1043,6 +1043,10 @@ static int nldev_get_doit(struct sk_buff *skb, struct nlmsghdr *nlh, nlh = nlmsg_put(msg, NETLINK_CB(skb).portid, nlh->nlmsg_seq, RDMA_NL_GET_TYPE(RDMA_NL_NLDEV, RDMA_NLDEV_CMD_GET), 0, 0); + if (!nlh) { + err = -EMSGSIZE; + goto err_free; + } err = fill_dev_info(msg, device); if (err) @@ -1128,7 +1132,7 @@ static int _nldev_get_dumpit(struct ib_device *device, RDMA_NL_GET_TYPE(RDMA_NL_NLDEV, RDMA_NLDEV_CMD_GET), 0, NLM_F_MULTI); - if (fill_dev_info(skb, device)) { + if (!nlh || fill_dev_info(skb, device)) { nlmsg_cancel(skb, nlh); goto out; } @@ -1187,6 +1191,10 @@ static int nldev_port_get_doit(struct sk_buff *skb, struct nlmsghdr *nlh, nlh = nlmsg_put(msg, NETLINK_CB(skb).portid, nlh->nlmsg_seq, RDMA_NL_GET_TYPE(RDMA_NL_NLDEV, RDMA_NLDEV_CMD_GET), 0, 0); + if (!nlh) { + err = -EMSGSIZE; + goto err_free; + } err = fill_port_info(msg, device, port, sock_net(skb->sk)); if (err) @@ -1248,7 +1256,7 @@ static int nldev_port_get_dumpit(struct sk_buff *skb, RDMA_NLDEV_CMD_PORT_GET), 0, NLM_F_MULTI); - if (fill_port_info(skb, device, p, sock_net(skb->sk))) { + if (!nlh || fill_port_info(skb, device, p, sock_net(skb->sk))) { nlmsg_cancel(skb, nlh); goto out; } @@ -1290,6 +1298,10 @@ static int nldev_res_get_doit(struct sk_buff *skb, struct nlmsghdr *nlh, nlh = nlmsg_put(msg, NETLINK_CB(skb).portid, nlh->nlmsg_seq, RDMA_NL_GET_TYPE(RDMA_NL_NLDEV, RDMA_NLDEV_CMD_RES_GET), 0, 0); + if (!nlh) { + ret = -EMSGSIZE; + goto err_free; + } ret = fill_res_info(msg, device); if (ret) @@ -1321,7 +1333,7 @@ static int _nldev_res_get_dumpit(struct ib_device *device, RDMA_NL_GET_TYPE(RDMA_NL_NLDEV, RDMA_NLDEV_CMD_RES_GET), 0, NLM_F_MULTI); - if (fill_res_info(skb, device)) { + if (!nlh || fill_res_info(skb, device)) { nlmsg_cancel(skb, nlh); goto out; } @@ -1456,7 +1468,7 @@ static int res_get_common_doit(struct sk_buff *skb, struct nlmsghdr *nlh, RDMA_NL_GET_OP(nlh->nlmsg_type)), 0, 0); - if (fill_nldev_handle(msg, device)) { + if (!nlh || fill_nldev_handle(msg, device)) { ret = -EMSGSIZE; goto err_free; } @@ -1535,7 +1547,7 @@ static int res_get_common_dumpit(struct sk_buff *skb, RDMA_NL_GET_OP(cb->nlh->nlmsg_type)), 0, NLM_F_MULTI); - if (fill_nldev_handle(skb, device)) { + if (!nlh || fill_nldev_handle(skb, device)) { ret = -EMSGSIZE; goto err; } @@ -1797,6 +1809,10 @@ static int nldev_get_chardev(struct sk_buff *skb, struct nlmsghdr *nlh, RDMA_NL_GET_TYPE(RDMA_NL_NLDEV, RDMA_NLDEV_CMD_GET_CHARDEV), 0, 0); + if (!nlh) { + err = -EMSGSIZE; + goto out_nlmsg; + } data.nl_msg = msg; err = ib_get_client_nl_info(ibdev, client_name, &data); @@ -1854,6 +1870,10 @@ static int nldev_sys_get_doit(struct sk_buff *skb, struct nlmsghdr *nlh, RDMA_NL_GET_TYPE(RDMA_NL_NLDEV, RDMA_NLDEV_CMD_SYS_GET), 0, 0); + if (!nlh) { + nlmsg_free(msg); + return -EMSGSIZE; + } err = nla_put_u8(msg, RDMA_NLDEV_SYS_ATTR_NETNS_MODE, (u8)ib_devices_shared_netns); @@ -2034,7 +2054,7 @@ static int nldev_stat_set_doit(struct sk_buff *skb, struct nlmsghdr *nlh, RDMA_NL_GET_TYPE(RDMA_NL_NLDEV, RDMA_NLDEV_CMD_STAT_SET), 0, 0); - if (fill_nldev_handle(msg, device) || + if (!nlh || fill_nldev_handle(msg, device) || nla_put_u32(msg, RDMA_NLDEV_ATTR_PORT_INDEX, port)) { ret = -EMSGSIZE; goto err_free_msg; @@ -2103,6 +2123,10 @@ static int nldev_stat_del_doit(struct sk_buff *skb, struct nlmsghdr *nlh, RDMA_NL_GET_TYPE(RDMA_NL_NLDEV, RDMA_NLDEV_CMD_STAT_SET), 0, 0); + if (!nlh) { + ret = -EMSGSIZE; + goto err_fill; + } cntn = nla_get_u32(tb[RDMA_NLDEV_ATTR_STAT_COUNTER_ID]); qpn = nla_get_u32(tb[RDMA_NLDEV_ATTR_RES_LQPN]); @@ -2173,7 +2197,7 @@ static int stat_get_doit_default_counter(struct sk_buff *skb, RDMA_NLDEV_CMD_STAT_GET), 0, 0); - if (fill_nldev_handle(msg, device) || + if (!nlh || fill_nldev_handle(msg, device) || nla_put_u32(msg, RDMA_NLDEV_ATTR_PORT_INDEX, port)) { ret = -EMSGSIZE; goto err_msg; @@ -2261,6 +2285,10 @@ static int stat_get_doit_qp(struct sk_buff *skb, struct nlmsghdr *nlh, RDMA_NL_GET_TYPE(RDMA_NL_NLDEV, RDMA_NLDEV_CMD_STAT_GET), 0, 0); + if (!nlh) { + ret = -EMSGSIZE; + goto err_msg; + } ret = rdma_counter_get_mode(device, port, &mode, &mask); if (ret) @@ -2393,7 +2421,7 @@ static int nldev_stat_get_counter_status_doit(struct sk_buff *skb, 0, 0); ret = -EMSGSIZE; - if (fill_nldev_handle(msg, device) || + if (!nlh || fill_nldev_handle(msg, device) || nla_put_u32(msg, RDMA_NLDEV_ATTR_PORT_INDEX, port)) goto err_msg; |