CVE-2024-42140 riscv: kexec: Avoid deadlock in kexec crash path

2024-07-3007:46:34

Linux

www.cve.org

linux kernel

vulnerability

resolved

riscv

kexec

deadlock

interrupt

irqdesc

spinlock

irqchip

arm64

irq_eoi

irq_set_irqchip_state.

EPSS

Percentile

5.0%

JSON

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

riscv: kexec: Avoid deadlock in kexec crash path

If the kexec crash code is called in the interrupt context, the
machine_kexec_mask_interrupts() function will trigger a deadlock while
trying to acquire the irqdesc spinlock and then deactivate irqchip in
irq_set_irqchip_state() function.

Unlike arm64, riscv only requires irq_eoi handler to complete EOI and
keeping irq_set_irqchip_state() will only leave this possible deadlock
without any use. So we simply remove it.

CNA Affected

[
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "unaffected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "arch/riscv/kernel/machine_kexec.c"
    ],
    "versions": [
      {
        "version": "12f237200c16",
        "lessThan": "bb80a7911218",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "b17d19a5314a",
        "lessThan": "653deee48a46",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "b17d19a5314a",
        "lessThan": "7692c9b6baac",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "b17d19a5314a",
        "lessThan": "484dd545271d",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "b17d19a5314a",
        "lessThan": "c562ba719df5",
        "status": "affected",
        "versionType": "git"
      }
    ]
  },
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "affected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "arch/riscv/kernel/machine_kexec.c"
    ],
    "versions": [
      {
        "version": "6.1",
        "status": "affected"
      },
      {
        "version": "0",
        "lessThan": "6.1",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "5.15.163",
        "lessThanOrEqual": "5.15.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.1.98",
        "lessThanOrEqual": "6.1.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.6.39",
        "lessThanOrEqual": "6.6.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.9.9",
        "lessThanOrEqual": "6.9.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.10",
        "lessThanOrEqual": "*",
        "status": "unaffected",
        "versionType": "original_commit_for_fix"
      }
    ]
  }
]