| 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-2022-48745: net/mlx5: Use del_timer_sync in fw reset flow of halting poll |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| net/mlx5: Use del_timer_sync in fw reset flow of halting poll |
| |
| Substitute del_timer() with del_timer_sync() in fw reset polling |
| deactivation flow, in order to prevent a race condition which occurs |
| when del_timer() is called and timer is deactivated while another |
| process is handling the timer interrupt. A situation that led to |
| the following call trace: |
| RIP: 0010:run_timer_softirq+0x137/0x420 |
| <IRQ> |
| recalibrate_cpu_khz+0x10/0x10 |
| ktime_get+0x3e/0xa0 |
| ? sched_clock_cpu+0xb/0xc0 |
| __do_softirq+0xf5/0x2ea |
| irq_exit_rcu+0xc1/0xf0 |
| sysvec_apic_timer_interrupt+0x9e/0xc0 |
| asm_sysvec_apic_timer_interrupt+0x12/0x20 |
| </IRQ> |
| |
| The Linux kernel CVE team has assigned CVE-2022-48745 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 5.10 with commit 38b9f903f22b9baa5c4b9bfb07c8bbc49f5efbba and fixed in 5.10.97 with commit 502c37b033fab7cde3e95a570af4f073306be45e |
| Issue introduced in 5.10 with commit 38b9f903f22b9baa5c4b9bfb07c8bbc49f5efbba and fixed in 5.15.20 with commit f895ebeb44d09d02674cfdd0cfc2bf687603918c |
| Issue introduced in 5.10 with commit 38b9f903f22b9baa5c4b9bfb07c8bbc49f5efbba and fixed in 5.16.6 with commit 2a038dd1d942f8fbc495c58fa592ff24af05f1c2 |
| Issue introduced in 5.10 with commit 38b9f903f22b9baa5c4b9bfb07c8bbc49f5efbba and fixed in 5.17 with commit 3c5193a87b0fea090aa3f769d020337662d87b5e |
| |
| 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-2022-48745 |
| 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/fw_reset.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/502c37b033fab7cde3e95a570af4f073306be45e |
| https://git.kernel.org/stable/c/f895ebeb44d09d02674cfdd0cfc2bf687603918c |
| https://git.kernel.org/stable/c/2a038dd1d942f8fbc495c58fa592ff24af05f1c2 |
| https://git.kernel.org/stable/c/3c5193a87b0fea090aa3f769d020337662d87b5e |
