| From bippy-5f407fcff5a0 Mon Sep 17 00:00:00 2001 |
| From: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
| To: <linux-cve-announce@vger.kernel.org> |
| Reply-to: <cve@kernel.org>, <linux-kernel@vger.kernel.org> |
| Subject: CVE-2024-50136: net/mlx5: Unregister notifier on eswitch init failure |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| net/mlx5: Unregister notifier on eswitch init failure |
| |
| It otherwise remains registered and a subsequent attempt at eswitch |
| enabling might trigger warnings of the sort: |
| |
| [ 682.589148] ------------[ cut here ]------------ |
| [ 682.590204] notifier callback eswitch_vport_event [mlx5_core] already registered |
| [ 682.590256] WARNING: CPU: 13 PID: 2660 at kernel/notifier.c:31 notifier_chain_register+0x3e/0x90 |
| [...snipped] |
| [ 682.610052] Call Trace: |
| [ 682.610369] <TASK> |
| [ 682.610663] ? __warn+0x7c/0x110 |
| [ 682.611050] ? notifier_chain_register+0x3e/0x90 |
| [ 682.611556] ? report_bug+0x148/0x170 |
| [ 682.611977] ? handle_bug+0x36/0x70 |
| [ 682.612384] ? exc_invalid_op+0x13/0x60 |
| [ 682.612817] ? asm_exc_invalid_op+0x16/0x20 |
| [ 682.613284] ? notifier_chain_register+0x3e/0x90 |
| [ 682.613789] atomic_notifier_chain_register+0x25/0x40 |
| [ 682.614322] mlx5_eswitch_enable_locked+0x1d4/0x3b0 [mlx5_core] |
| [ 682.614965] mlx5_eswitch_enable+0xc9/0x100 [mlx5_core] |
| [ 682.615551] mlx5_device_enable_sriov+0x25/0x340 [mlx5_core] |
| [ 682.616170] mlx5_core_sriov_configure+0x50/0x170 [mlx5_core] |
| [ 682.616789] sriov_numvfs_store+0xb0/0x1b0 |
| [ 682.617248] kernfs_fop_write_iter+0x117/0x1a0 |
| [ 682.617734] vfs_write+0x231/0x3f0 |
| [ 682.618138] ksys_write+0x63/0xe0 |
| [ 682.618536] do_syscall_64+0x4c/0x100 |
| [ 682.618958] entry_SYSCALL_64_after_hwframe+0x4b/0x53 |
| |
| The Linux kernel CVE team has assigned CVE-2024-50136 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 6.1.60 with commit 0aa1e83a20f12e9eaad32f72212ebc7fe0c29c95 and fixed in 6.1.115 with commit e58fb7ddbab6635191c26dea1af26b91cce00866 |
| Issue introduced in 6.6 with commit 7624e58a8b3a251e3e5108b32f2183b34453db32 and fixed in 6.6.59 with commit 9f2ccb6f3888bec45c00121ee43e4e72423b12c1 |
| Issue introduced in 6.6 with commit 7624e58a8b3a251e3e5108b32f2183b34453db32 and fixed in 6.11.6 with commit 599147722c5778c96292e2fbff4103abbdb45b1f |
| Issue introduced in 6.6 with commit 7624e58a8b3a251e3e5108b32f2183b34453db32 and fixed in 6.12 with commit 1da9cfd6c41c2e6bbe624d0568644e1521c33e12 |
| Issue introduced in 6.5.9 with commit dc426bd9d813aa5754ce35adaa6f97f0585c06fc |
| |
| 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-2024-50136 |
| 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/e58fb7ddbab6635191c26dea1af26b91cce00866 |
| https://git.kernel.org/stable/c/9f2ccb6f3888bec45c00121ee43e4e72423b12c1 |
| https://git.kernel.org/stable/c/599147722c5778c96292e2fbff4103abbdb45b1f |
| https://git.kernel.org/stable/c/1da9cfd6c41c2e6bbe624d0568644e1521c33e12 |
