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Message-ID: <2025050216-CVE-2023-53079-448b@gregkh> Date: Fri, 2 May 2025 17:55:44 +0200 From: Greg Kroah-Hartman <gregkh@...uxfoundation.org> To: linux-cve-announce@...r.kernel.org Cc: Greg Kroah-Hartman <gregkh@...nel.org> Subject: CVE-2023-53079: net/mlx5: Fix steering rules cleanup From: Greg Kroah-Hartman <gregkh@...nel.org> Description =========== In the Linux kernel, the following vulnerability has been resolved: net/mlx5: Fix steering rules cleanup vport's mc, uc and multicast rules are not deleted in teardown path when EEH happens. Since the vport's promisc settings(uc, mc and all) in firmware are reset after EEH, mlx5 driver will try to delete the above rules in the initialization path. This cause kernel crash because these software rules are no longer valid. Fix by nullifying these rules right after delete to avoid accessing any dangling pointers. Call Trace: __list_del_entry_valid+0xcc/0x100 (unreliable) tree_put_node+0xf4/0x1b0 [mlx5_core] tree_remove_node+0x30/0x70 [mlx5_core] mlx5_del_flow_rules+0x14c/0x1f0 [mlx5_core] esw_apply_vport_rx_mode+0x10c/0x200 [mlx5_core] esw_update_vport_rx_mode+0xb4/0x180 [mlx5_core] esw_vport_change_handle_locked+0x1ec/0x230 [mlx5_core] esw_enable_vport+0x130/0x260 [mlx5_core] mlx5_eswitch_enable_sriov+0x2a0/0x2f0 [mlx5_core] mlx5_device_enable_sriov+0x74/0x440 [mlx5_core] mlx5_load_one+0x114c/0x1550 [mlx5_core] mlx5_pci_resume+0x68/0xf0 [mlx5_core] eeh_report_resume+0x1a4/0x230 eeh_pe_dev_traverse+0x98/0x170 eeh_handle_normal_event+0x3e4/0x640 eeh_handle_event+0x4c/0x370 eeh_event_handler+0x14c/0x210 kthread+0x168/0x1b0 ret_from_kernel_thread+0x5c/0x84 The Linux kernel CVE team has assigned CVE-2023-53079 to this issue. Affected and fixed versions =========================== Issue introduced in 4.7 with commit a35f71f27a614aff106cc89b86168962bce2725f and fixed in 5.10.177 with commit 18cead61e437f4c7898acca0a5f3df12f801d97f Issue introduced in 4.7 with commit a35f71f27a614aff106cc89b86168962bce2725f and fixed in 5.15.105 with commit 4df1f2d36bdc9a368650bf14b9097c555e95f71d Issue introduced in 4.7 with commit a35f71f27a614aff106cc89b86168962bce2725f and fixed in 6.1.22 with commit 63546395a0e6ac264f78f65218086ce6014b4494 Issue introduced in 4.7 with commit a35f71f27a614aff106cc89b86168962bce2725f and fixed in 6.2.9 with commit 6f5780536181d1d0d09a11a1bc92f22e143447e2 Issue introduced in 4.7 with commit a35f71f27a614aff106cc89b86168962bce2725f and fixed in 6.3 with commit 922f56e9a795d6f3dd72d3428ebdd7ee040fa855 Please see https://www.kernel.org for a full list of currently supported kernel versions by the kernel community. Unaffected versions might change over time as fixes are backported to older supported kernel versions. The official CVE entry at https://cve.org/CVERecord/?id=CVE-2023-53079 will be updated if fixes are backported, please check that for the most up to date information about this issue. Affected files ============== The file(s) affected by this issue are: drivers/net/ethernet/mellanox/mlx5/core/eswitch.c Mitigation ========== The Linux kernel CVE team recommends that you update to the latest stable kernel version for this, and many other bugfixes. Individual changes are never tested alone, but rather are part of a larger kernel release. Cherry-picking individual commits is not recommended or supported by the Linux kernel community at all. If however, updating to the latest release is impossible, the individual changes to resolve this issue can be found at these commits: https://git.kernel.org/stable/c/18cead61e437f4c7898acca0a5f3df12f801d97f https://git.kernel.org/stable/c/4df1f2d36bdc9a368650bf14b9097c555e95f71d https://git.kernel.org/stable/c/63546395a0e6ac264f78f65218086ce6014b4494 https://git.kernel.org/stable/c/6f5780536181d1d0d09a11a1bc92f22e143447e2 https://git.kernel.org/stable/c/922f56e9a795d6f3dd72d3428ebdd7ee040fa855
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