| 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-2022-49175: PM: core: keep irq flags in device_pm_check_callbacks() |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| PM: core: keep irq flags in device_pm_check_callbacks() |
| |
| The function device_pm_check_callbacks() can be called under the spin |
| lock (in the reported case it happens from genpd_add_device() -> |
| dev_pm_domain_set(), when the genpd uses spinlocks rather than mutexes. |
| |
| However this function uncoditionally uses spin_lock_irq() / |
| spin_unlock_irq(), thus not preserving the CPU flags. Use the |
| irqsave/irqrestore instead. |
| |
| The backtrace for the reference: |
| [ 2.752010] ------------[ cut here ]------------ |
| [ 2.756769] raw_local_irq_restore() called with IRQs enabled |
| [ 2.762596] WARNING: CPU: 4 PID: 1 at kernel/locking/irqflag-debug.c:10 warn_bogus_irq_restore+0x34/0x50 |
| [ 2.772338] Modules linked in: |
| [ 2.775487] CPU: 4 PID: 1 Comm: swapper/0 Tainted: G S 5.17.0-rc6-00384-ge330d0d82eff-dirty #684 |
| [ 2.781384] Freeing initrd memory: 46024K |
| [ 2.785839] pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) |
| [ 2.785841] pc : warn_bogus_irq_restore+0x34/0x50 |
| [ 2.785844] lr : warn_bogus_irq_restore+0x34/0x50 |
| [ 2.785846] sp : ffff80000805b7d0 |
| [ 2.785847] x29: ffff80000805b7d0 x28: 0000000000000000 x27: 0000000000000002 |
| [ 2.785850] x26: ffffd40e80930b18 x25: ffff7ee2329192b8 x24: ffff7edfc9f60800 |
| [ 2.785853] x23: ffffd40e80930b18 x22: ffffd40e80930d30 x21: ffff7edfc0dffa00 |
| [ 2.785856] x20: ffff7edfc09e3768 x19: 0000000000000000 x18: ffffffffffffffff |
| [ 2.845775] x17: 6572206f74206465 x16: 6c696166203a3030 x15: ffff80008805b4f7 |
| [ 2.853108] x14: 0000000000000000 x13: ffffd40e809550b0 x12: 00000000000003d8 |
| [ 2.860441] x11: 0000000000000148 x10: ffffd40e809550b0 x9 : ffffd40e809550b0 |
| [ 2.867774] x8 : 00000000ffffefff x7 : ffffd40e809ad0b0 x6 : ffffd40e809ad0b0 |
| [ 2.875107] x5 : 000000000000bff4 x4 : 0000000000000000 x3 : 0000000000000000 |
| [ 2.882440] x2 : 0000000000000000 x1 : 0000000000000000 x0 : ffff7edfc03a8000 |
| [ 2.889774] Call trace: |
| [ 2.892290] warn_bogus_irq_restore+0x34/0x50 |
| [ 2.896770] _raw_spin_unlock_irqrestore+0x94/0xa0 |
| [ 2.901690] genpd_unlock_spin+0x20/0x30 |
| [ 2.905724] genpd_add_device+0x100/0x2d0 |
| [ 2.909850] __genpd_dev_pm_attach+0xa8/0x23c |
| [ 2.914329] genpd_dev_pm_attach_by_id+0xc4/0x190 |
| [ 2.919167] genpd_dev_pm_attach_by_name+0x3c/0xd0 |
| [ 2.924086] dev_pm_domain_attach_by_name+0x24/0x30 |
| [ 2.929102] psci_dt_attach_cpu+0x24/0x90 |
| [ 2.933230] psci_cpuidle_probe+0x2d4/0x46c |
| [ 2.937534] platform_probe+0x68/0xe0 |
| [ 2.941304] really_probe.part.0+0x9c/0x2fc |
| [ 2.945605] __driver_probe_device+0x98/0x144 |
| [ 2.950085] driver_probe_device+0x44/0x15c |
| [ 2.954385] __device_attach_driver+0xb8/0x120 |
| [ 2.958950] bus_for_each_drv+0x78/0xd0 |
| [ 2.962896] __device_attach+0xd8/0x180 |
| [ 2.966843] device_initial_probe+0x14/0x20 |
| [ 2.971144] bus_probe_device+0x9c/0xa4 |
| [ 2.975092] device_add+0x380/0x88c |
| [ 2.978679] platform_device_add+0x114/0x234 |
| [ 2.983067] platform_device_register_full+0x100/0x190 |
| [ 2.988344] psci_idle_init+0x6c/0xb0 |
| [ 2.992113] do_one_initcall+0x74/0x3a0 |
| [ 2.996060] kernel_init_freeable+0x2fc/0x384 |
| [ 3.000543] kernel_init+0x28/0x130 |
| [ 3.004132] ret_from_fork+0x10/0x20 |
| [ 3.007817] irq event stamp: 319826 |
| [ 3.011404] hardirqs last enabled at (319825): [<ffffd40e7eda0268>] __up_console_sem+0x78/0x84 |
| [ 3.020332] hardirqs last disabled at (319826): [<ffffd40e7fd6d9d8>] el1_dbg+0x24/0x8c |
| [ 3.028458] softirqs last enabled at (318312): [<ffffd40e7ec90410>] _stext+0x410/0x588 |
| [ 3.036678] softirqs last disabled at (318299): [<ffffd40e7ed1bf68>] __irq_exit_rcu+0x158/0x174 |
| [ 3.045607] ---[ end trace 0000000000000000 ]--- |
| |
| The Linux kernel CVE team has assigned CVE-2022-49175 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Fixed in 4.9.311 with commit 3ec80d52b9b74b9e691997632a543c73eddfeba0 |
| Fixed in 4.14.276 with commit 78c4d68b952f5f537788dbd454031ea9bf50f642 |
| Fixed in 4.19.238 with commit be8bc05f38d667eda1e820bc6f69234795be7809 |
| Fixed in 5.4.189 with commit 0cccf9d4fb45f1acbc0bbf6d7e4d8d0fb7a10416 |
| Fixed in 5.10.110 with commit ede1ef1a7de973321699736ef96d01a4b9a6fe9e |
| Fixed in 5.15.33 with commit c29642ba72f87c0a3d7449f7db5d6d76a7ed53c3 |
| Fixed in 5.16.19 with commit 2add538e57a2825c61d639260386f385c75e4166 |
| Fixed in 5.17.2 with commit c7c0ec5a1dcc3eaa1e85c804c2ccf46e457788a3 |
| Fixed in 5.18 with commit 524bb1da785a7ae43dd413cd392b5071c6c367f8 |
| |
| 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-2022-49175 |
| 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/base/power/main.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/3ec80d52b9b74b9e691997632a543c73eddfeba0 |
| https://git.kernel.org/stable/c/78c4d68b952f5f537788dbd454031ea9bf50f642 |
| https://git.kernel.org/stable/c/be8bc05f38d667eda1e820bc6f69234795be7809 |
| https://git.kernel.org/stable/c/0cccf9d4fb45f1acbc0bbf6d7e4d8d0fb7a10416 |
| https://git.kernel.org/stable/c/ede1ef1a7de973321699736ef96d01a4b9a6fe9e |
| https://git.kernel.org/stable/c/c29642ba72f87c0a3d7449f7db5d6d76a7ed53c3 |
| https://git.kernel.org/stable/c/2add538e57a2825c61d639260386f385c75e4166 |
| https://git.kernel.org/stable/c/c7c0ec5a1dcc3eaa1e85c804c2ccf46e457788a3 |
| https://git.kernel.org/stable/c/524bb1da785a7ae43dd413cd392b5071c6c367f8 |
