| 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-2024-26892: wifi: mt76: mt7921e: fix use-after-free in free_irq() |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| wifi: mt76: mt7921e: fix use-after-free in free_irq() |
| |
| From commit a304e1b82808 ("[PATCH] Debug shared irqs"), there is a test |
| to make sure the shared irq handler should be able to handle the unexpected |
| event after deregistration. For this case, let's apply MT76_REMOVED flag to |
| indicate the device was removed and do not run into the resource access |
| anymore. |
| |
| BUG: KASAN: use-after-free in mt7921_irq_handler+0xd8/0x100 [mt7921e] |
| Read of size 8 at addr ffff88824a7d3b78 by task rmmod/11115 |
| CPU: 28 PID: 11115 Comm: rmmod Tainted: G W L 5.17.0 #10 |
| Hardware name: Micro-Star International Co., Ltd. MS-7D73/MPG B650I |
| EDGE WIFI (MS-7D73), BIOS 1.81 01/05/2024 |
| Call Trace: |
| <TASK> |
| dump_stack_lvl+0x6f/0xa0 |
| print_address_description.constprop.0+0x1f/0x190 |
| ? mt7921_irq_handler+0xd8/0x100 [mt7921e] |
| ? mt7921_irq_handler+0xd8/0x100 [mt7921e] |
| kasan_report.cold+0x7f/0x11b |
| ? mt7921_irq_handler+0xd8/0x100 [mt7921e] |
| mt7921_irq_handler+0xd8/0x100 [mt7921e] |
| free_irq+0x627/0xaa0 |
| devm_free_irq+0x94/0xd0 |
| ? devm_request_any_context_irq+0x160/0x160 |
| ? kobject_put+0x18d/0x4a0 |
| mt7921_pci_remove+0x153/0x190 [mt7921e] |
| pci_device_remove+0xa2/0x1d0 |
| __device_release_driver+0x346/0x6e0 |
| driver_detach+0x1ef/0x2c0 |
| bus_remove_driver+0xe7/0x2d0 |
| ? __check_object_size+0x57/0x310 |
| pci_unregister_driver+0x26/0x250 |
| __do_sys_delete_module+0x307/0x510 |
| ? free_module+0x6a0/0x6a0 |
| ? fpregs_assert_state_consistent+0x4b/0xb0 |
| ? rcu_read_lock_sched_held+0x10/0x70 |
| ? syscall_enter_from_user_mode+0x20/0x70 |
| ? trace_hardirqs_on+0x1c/0x130 |
| do_syscall_64+0x5c/0x80 |
| ? trace_hardirqs_on_prepare+0x72/0x160 |
| ? do_syscall_64+0x68/0x80 |
| ? trace_hardirqs_on_prepare+0x72/0x160 |
| entry_SYSCALL_64_after_hwframe+0x44/0xae |
| |
| The Linux kernel CVE team has assigned CVE-2024-26892 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 6.4 with commit 9270270d62191b7549296721e8d5f3dc0df01563 and fixed in 6.6.23 with commit c7dd42fbebcfb02bef070fd48f774d6412d0b49d |
| Issue introduced in 6.4 with commit 9270270d62191b7549296721e8d5f3dc0df01563 and fixed in 6.7.11 with commit bfe1adf1606f76c180324e53b130f0e76d5cc6c3 |
| Issue introduced in 6.4 with commit 9270270d62191b7549296721e8d5f3dc0df01563 and fixed in 6.8.2 with commit bfeaef901194c5923ce3330272786eff2fac513a |
| Issue introduced in 6.4 with commit 9270270d62191b7549296721e8d5f3dc0df01563 and fixed in 6.9 with commit c957280ef6ab6bdf559a91ae693a6b34310697e3 |
| Issue introduced in 6.2.15 with commit a76eaaaafd8b408238d7865bbbbd311f08988f3d |
| Issue introduced in 6.3.2 with commit 95e41ac30a0d0b3637f0b3c93235a7a107a2fb7f |
| |
| 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-2024-26892 |
| 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/wireless/mediatek/mt76/mt7921/pci.c |
| drivers/net/wireless/mediatek/mt76/mt792x_dma.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/c7dd42fbebcfb02bef070fd48f774d6412d0b49d |
| https://git.kernel.org/stable/c/bfe1adf1606f76c180324e53b130f0e76d5cc6c3 |
| https://git.kernel.org/stable/c/bfeaef901194c5923ce3330272786eff2fac513a |
| https://git.kernel.org/stable/c/c957280ef6ab6bdf559a91ae693a6b34310697e3 |
