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RDMA/mlx5: Add check for srq max_sge attribute 

[ Upstream commit 36ab7ada64caf08f10ee5a114d39964d1f91e81d ]

max_sge attribute is passed by the user, and is inserted and used
unchecked, so verify that the value doesn't exceed maximum allowed value
before using it.

This fixes CVE-2024-40990

Fixes: e126ba97db ("mlx5: Add driver for Mellanox Connect-IB adapters")
Signed-off-by: Patrisious Haddad <phaddad@nvidia.com>
Link: https://lore.kernel.org/r/277ccc29e8d57bfd53ddeb2ac633f2760cf8cdd0.1716900410.git.leon@kernel.org
Signed-off-by: Leon Romanovsky <leon@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Huang Cun <cunhuang@tencent.com>
Signed-off-by: Jianping Liu <frankjpliu@tencent.com>
This commit is contained in:
Patrisious Haddad 2024-05-28 15:52:56 +03:00 committed by Jianping Liu
parent 7ff783861e
commit 0e351cba92
1 changed files with 8 additions and 5 deletions
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13
drivers/infiniband/hw/mlx5/srq.c
View File

@ -225,12 +225,15 @@ int mlx5_ib_create_srq(struct ib_srq *ib_srq,
int err;
struct mlx5_srq_attr in = {};
__u32 max_srq_wqes = 1 << MLX5_CAP_GEN(dev->mdev, log_max_srq_sz);
__u32 max_sge_sz = MLX5_CAP_GEN(dev->mdev, max_wqe_sz_rq) /
sizeof(struct mlx5_wqe_data_seg);
/* Sanity check SRQ size before proceeding */
if (init_attr->attr.max_wr >= max_srq_wqes) {
mlx5_ib_dbg(dev, "max_wr %d, cap %d\n",
init_attr->attr.max_wr,
max_srq_wqes);
/* Sanity check SRQ and sge size before proceeding */
if (init_attr->attr.max_wr >= max_srq_wqes ||
init_attr->attr.max_sge > max_sge_sz) {
mlx5_ib_dbg(dev, "max_wr %d,wr_cap %d,max_sge %d, sge_cap:%d\n",
init_attr->attr.max_wr, max_srq_wqes,
init_attr->attr.max_sge, max_sge_sz);
return -EINVAL;
}