Patch "RDMA/mlx5: Add check for srq max_sge attribute" has been added to the 5.10-stable tree

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This is a note to let you know that I've just added the patch titled

    RDMA/mlx5: Add check for srq max_sge attribute

to the 5.10-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     rdma-mlx5-add-check-for-srq-max_sge-attribute.patch
and it can be found in the queue-5.10 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.



commit 1ad882bf8ff7529850cc920ebf7ea361db55dd9d
Author: Patrisious Haddad <phaddad@xxxxxxxxxx>
Date:   Tue May 28 15:52:56 2024 +0300

    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.
    
    Fixes: e126ba97dba9 ("mlx5: Add driver for Mellanox Connect-IB adapters")
    Signed-off-by: Patrisious Haddad <phaddad@xxxxxxxxxx>
    Link: https://lore.kernel.org/r/277ccc29e8d57bfd53ddeb2ac633f2760cf8cdd0.1716900410.git.leon@xxxxxxxxxx
    Signed-off-by: Leon Romanovsky <leon@xxxxxxxxxx>
    Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>

diff --git a/drivers/infiniband/hw/mlx5/srq.c b/drivers/infiniband/hw/mlx5/srq.c
index 12d485872e771..7df3f32cc6434 100644
--- a/drivers/infiniband/hw/mlx5/srq.c
+++ b/drivers/infiniband/hw/mlx5/srq.c
@@ -225,17 +225,20 @@ 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);
 
 	if (init_attr->srq_type != IB_SRQT_BASIC &&
 	    init_attr->srq_type != IB_SRQT_XRC &&
 	    init_attr->srq_type != IB_SRQT_TM)
 		return -EOPNOTSUPP;
 
-	/* 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;
 	}
 




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