CVE-2024-42290 irqchip/imx-irqsteer: Handle runtime power management correctly

2024-08-1709:08:59

Linux

www.cve.org

linux kernel

vulnerability

irqchip/imx-irqsteer

runtime power management

scheduling while atomic bug

device probing

irq_bus_lock

sync_unlock

interrupt chip

non-atomic context

EPSS

Percentile

10.8%

JSON

In the Linux kernel, the following vulnerability has been resolved:

irqchip/imx-irqsteer: Handle runtime power management correctly

The power domain is automatically activated from clk_prepare(). However, on
certain platforms like i.MX8QM and i.MX8QXP, the power-on handling invokes
sleeping functions, which triggers the ‘scheduling while atomic’ bug in the
context switch path during device probing:

BUG: scheduling while atomic: kworker/u13:1/48/0x00000002
Call trace:
__schedule_bug+0x54/0x6c
__schedule+0x7f0/0xa94
schedule+0x5c/0xc4
schedule_preempt_disabled+0x24/0x40
__mutex_lock.constprop.0+0x2c0/0x540
__mutex_lock_slowpath+0x14/0x20
mutex_lock+0x48/0x54
clk_prepare_lock+0x44/0xa0
clk_prepare+0x20/0x44
imx_irqsteer_resume+0x28/0xe0
pm_generic_runtime_resume+0x2c/0x44
__genpd_runtime_resume+0x30/0x80
genpd_runtime_resume+0xc8/0x2c0
__rpm_callback+0x48/0x1d8
rpm_callback+0x6c/0x78
rpm_resume+0x490/0x6b4
__pm_runtime_resume+0x50/0x94
irq_chip_pm_get+0x2c/0xa0
__irq_do_set_handler+0x178/0x24c
irq_set_chained_handler_and_data+0x60/0xa4
mxc_gpio_probe+0x160/0x4b0

Cure this by implementing the irq_bus_lock/sync_unlock() interrupt chip
callbacks and handle power management in them as they are invoked from
non-atomic context.

[ tglx: Rewrote change log, added Fixes tag ]

CNA Affected

[
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "unaffected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "drivers/irqchip/irq-imx-irqsteer.c"
    ],
    "versions": [
      {
        "version": "0136afa08967",
        "lessThan": "a590e8dea3df",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "0136afa08967",
        "lessThan": "3a2884a44e5c",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "0136afa08967",
        "lessThan": "fa1803401e1c",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "0136afa08967",
        "lessThan": "58c56735facb",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "0136afa08967",
        "lessThan": "21bd3f9e7f92",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "0136afa08967",
        "lessThan": "f8ae38f1dfe6",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "0136afa08967",
        "lessThan": "33b1c47d1fc0",
        "status": "affected",
        "versionType": "git"
      }
    ]
  },
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "affected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "drivers/irqchip/irq-imx-irqsteer.c"
    ],
    "versions": [
      {
        "version": "5.0",
        "status": "affected"
      },
      {
        "version": "0",
        "lessThan": "5.0",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "5.4.282",
        "lessThanOrEqual": "5.4.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "5.10.224",
        "lessThanOrEqual": "5.10.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "5.15.165",
        "lessThanOrEqual": "5.15.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.1.103",
        "lessThanOrEqual": "6.1.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.6.44",
        "lessThanOrEqual": "6.6.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.10.3",
        "lessThanOrEqual": "6.10.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.11",
        "lessThanOrEqual": "*",
        "status": "unaffected",
        "versionType": "original_commit_for_fix"
      }
    ]
  }
]