| 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-2022-48761: usb: xhci-plat: fix crash when suspend if remote wake enable |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| usb: xhci-plat: fix crash when suspend if remote wake enable |
| |
| Crashed at i.mx8qm platform when suspend if enable remote wakeup |
| |
| Internal error: synchronous external abort: 96000210 [#1] PREEMPT SMP |
| Modules linked in: |
| CPU: 2 PID: 244 Comm: kworker/u12:6 Not tainted 5.15.5-dirty #12 |
| Hardware name: Freescale i.MX8QM MEK (DT) |
| Workqueue: events_unbound async_run_entry_fn |
| pstate: 600000c5 (nZCv daIF -PAN -UAO -TCO -DIT -SSBS BTYPE=--) |
| pc : xhci_disable_hub_port_wake.isra.62+0x60/0xf8 |
| lr : xhci_disable_hub_port_wake.isra.62+0x34/0xf8 |
| sp : ffff80001394bbf0 |
| x29: ffff80001394bbf0 x28: 0000000000000000 x27: ffff00081193b578 |
| x26: ffff00081193b570 x25: 0000000000000000 x24: 0000000000000000 |
| x23: ffff00081193a29c x22: 0000000000020001 x21: 0000000000000001 |
| x20: 0000000000000000 x19: ffff800014e90490 x18: 0000000000000000 |
| x17: 0000000000000000 x16: 0000000000000000 x15: 0000000000000000 |
| x14: 0000000000000000 x13: 0000000000000002 x12: 0000000000000000 |
| x11: 0000000000000000 x10: 0000000000000960 x9 : ffff80001394baa0 |
| x8 : ffff0008145d1780 x7 : ffff0008f95b8e80 x6 : 000000001853b453 |
| x5 : 0000000000000496 x4 : 0000000000000000 x3 : ffff00081193a29c |
| x2 : 0000000000000001 x1 : 0000000000000000 x0 : ffff000814591620 |
| Call trace: |
| xhci_disable_hub_port_wake.isra.62+0x60/0xf8 |
| xhci_suspend+0x58/0x510 |
| xhci_plat_suspend+0x50/0x78 |
| platform_pm_suspend+0x2c/0x78 |
| dpm_run_callback.isra.25+0x50/0xe8 |
| __device_suspend+0x108/0x3c0 |
| |
| The basic flow: |
| 1. run time suspend call xhci_suspend, xhci parent devices gate the clock. |
| 2. echo mem >/sys/power/state, system _device_suspend call xhci_suspend |
| 3. xhci_suspend call xhci_disable_hub_port_wake, which access register, |
| but clock already gated by run time suspend. |
| |
| This problem was hidden by power domain driver, which call run time resume before it. |
| |
| But the below commit remove it and make this issue happen. |
| commit c1df456d0f06e ("PM: domains: Don't runtime resume devices at genpd_prepare()") |
| |
| This patch call run time resume before suspend to make sure clock is on |
| before access register. |
| |
| Testeb-by: Abel Vesa <abel.vesa@nxp.com> |
| |
| The Linux kernel CVE team has assigned CVE-2022-48761 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Fixed in 5.10.96 with commit 20c51a4c52208f98e27308c456a1951778f41fa5 |
| Fixed in 5.15.19 with commit d5755832a1e47f5d8773f0776e211ecd4e02da72 |
| Fixed in 5.16.5 with commit 8b05ad29acb972850ad795fa850e814b2e758b83 |
| Fixed in 5.17 with commit 9df478463d9feb90dae24f183383961cf123a0ec |
| |
| 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-2022-48761 |
| 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/usb/host/xhci-plat.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/20c51a4c52208f98e27308c456a1951778f41fa5 |
| https://git.kernel.org/stable/c/d5755832a1e47f5d8773f0776e211ecd4e02da72 |
| https://git.kernel.org/stable/c/8b05ad29acb972850ad795fa850e814b2e758b83 |
| https://git.kernel.org/stable/c/9df478463d9feb90dae24f183383961cf123a0ec |
