linux-kernel - [PATCH 5.10 0/1] net/mlx5e: Fix nullptr in mlx5e_tc_add_fdb

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Date:   Mon, 26 Dec 2022 10:09:49 -0800
From:   Nikita Zhandarovich <n.zhandarovich@...tech.ru>
To:     <stable@...r.kernel.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>
CC:     Nikita Zhandarovich <n.zhandarovich@...tech.ru>,
        Dima·Chumak· <dchumak@...dia.com>,
        Saeed Mahameed <saeedm@...dia.com>,
        Leon Romanovsky <leon@...nel.org>,
        "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>, <netdev@...r.kernel.org>,
        <linux-rdma@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <lvc-project@...uxtesting.org>
Subject: [PATCH 5.10 0/1] net/mlx5e: Fix nullptr in mlx5e_tc_add_fdb_flow()

The result of __dev_get_by_index() is not checked for NULL, which then
passed to mlx5e_attach_encap() and gets dereferenced.

This patch backports commit <fe7738e> to correct the issue in 5.10 branch.

Found by Linux Verification Center (linuxtesting.org) with SVACE.