From mboxrd@z Thu Jan 1 00:00:00 1970 From: Leon Romanovsky Subject: [PATCH rdma-next V1 3/5] IB/core: Fix a potential array overrun in CMA and SA agent Date: Fri, 6 May 2016 16:07:04 +0300 Message-ID: <1462540026-12012-4-git-send-email-leon@kernel.org> References: <1462540026-12012-1-git-send-email-leon@kernel.org> Return-path: In-Reply-To: <1462540026-12012-1-git-send-email-leon-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org> Sender: linux-rdma-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: dledford-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org Cc: linux-rdma-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, markb-VPRAkNaXOzVWk0Htik3J/w@public.gmane.org, majd-VPRAkNaXOzVWk0Htik3J/w@public.gmane.org, matanb-VPRAkNaXOzVWk0Htik3J/w@public.gmane.org, Leon Romanovsky List-Id: linux-rdma@vger.kernel.org From: Mark Bloch Fix array overrun when going over callback table. In declaration of callback table, the max size isn't provided and in registration phase, it is provided. There is potential scenario where a new operation is added and it is not supported by current client. The acceptance of such operation by ib_netlink will cause to array overrun. Fixes: 809d5fc9bf65 ("infiniband: pass rdma_cm module to netlink_dump_start") Fixes: b493d91d333e ("iwcm: common code for port mapper") Fixes: 2ca546b92a02 ("IB/sa: Route SA pathrecord query through netlink") Signed-off-by: Mark Bloch Reviewed-by: Leon Romanovsky Signed-off-by: Leon Romanovsky --- drivers/infiniband/core/cma.c | 3 ++- drivers/infiniband/core/iwcm.c | 2 +- drivers/infiniband/core/sa_query.c | 2 +- include/uapi/rdma/rdma_netlink.h | 8 +++----- 4 files changed, 7 insertions(+), 8 deletions(-) diff --git a/drivers/infiniband/core/cma.c b/drivers/infiniband/core/cma.c index 93ab0ae..b575bd5 100644 --- a/drivers/infiniband/core/cma.c +++ b/drivers/infiniband/core/cma.c @@ -4294,7 +4294,8 @@ static int __init cma_init(void) if (ret) goto err; - if (ibnl_add_client(RDMA_NL_RDMA_CM, RDMA_NL_RDMA_CM_NUM_OPS, cma_cb_table)) + if (ibnl_add_client(RDMA_NL_RDMA_CM, ARRAY_SIZE(cma_cb_table), + cma_cb_table)) pr_warn("RDMA CMA: failed to add netlink callback\n"); cma_configfs_init(); diff --git a/drivers/infiniband/core/iwcm.c b/drivers/infiniband/core/iwcm.c index e28a160..5011ecf 100644 --- a/drivers/infiniband/core/iwcm.c +++ b/drivers/infiniband/core/iwcm.c @@ -59,7 +59,7 @@ MODULE_AUTHOR("Tom Tucker"); MODULE_DESCRIPTION("iWARP CM"); MODULE_LICENSE("Dual BSD/GPL"); -static struct ibnl_client_cbs iwcm_nl_cb_table[] = { +static struct ibnl_client_cbs iwcm_nl_cb_table[RDMA_NL_IWPM_NUM_OPS] = { [RDMA_NL_IWPM_REG_PID] = {.dump = iwpm_register_pid_cb}, [RDMA_NL_IWPM_ADD_MAPPING] = {.dump = iwpm_add_mapping_cb}, [RDMA_NL_IWPM_QUERY_MAPPING] = {.dump = iwpm_add_and_query_mapping_cb}, diff --git a/drivers/infiniband/core/sa_query.c b/drivers/infiniband/core/sa_query.c index 8a09c0f..1e7c652 100644 --- a/drivers/infiniband/core/sa_query.c +++ b/drivers/infiniband/core/sa_query.c @@ -1820,7 +1820,7 @@ static int __init ib_sa_init(void) goto err3; } - if (ibnl_add_client(RDMA_NL_LS, RDMA_NL_LS_NUM_OPS, + if (ibnl_add_client(RDMA_NL_LS, ARRAY_SIZE(ib_sa_cb_table), ib_sa_cb_table)) { pr_err("Failed to add netlink callback\n"); ret = -EINVAL; diff --git a/include/uapi/rdma/rdma_netlink.h b/include/uapi/rdma/rdma_netlink.h index 6e373d1..acd175d 100644 --- a/include/uapi/rdma/rdma_netlink.h +++ b/include/uapi/rdma/rdma_netlink.h @@ -24,8 +24,7 @@ enum { #define RDMA_NL_GET_TYPE(client, op) ((client << 10) + op) enum { - RDMA_NL_RDMA_CM_ID_STATS = 0, - RDMA_NL_RDMA_CM_NUM_OPS + RDMA_NL_RDMA_CM_ID_STATS }; enum { @@ -137,9 +136,8 @@ enum { * SET_TIMEOUT - The local service requests the client to set the timeout. */ enum { - RDMA_NL_LS_OP_RESOLVE = 0, - RDMA_NL_LS_OP_SET_TIMEOUT, - RDMA_NL_LS_NUM_OPS + RDMA_NL_LS_OP_RESOLVE, + RDMA_NL_LS_OP_SET_TIMEOUT }; /* Local service netlink message flags */ -- 2.1.4 -- To unsubscribe from this list: send the line "unsubscribe linux-rdma" in the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org More majordomo info at http://vger.kernel.org/majordomo-info.html