CVE-2024-35819 soc: fsl: qbman: Use raw spinlock for cgr_lock

2024-05-1713:23:23

Linux

github.com

linux kernel

vulnerability

resolution

non-sleeping task

hard irq context

fsl

qbman

cve-2024-35819

6.7 Medium

AI Score

Confidence

Low

0.0004 Low

EPSS

Percentile

13.1%

JSON

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

soc: fsl: qbman: Use raw spinlock for cgr_lock

smp_call_function always runs its callback in hard IRQ context, even on
PREEMPT_RT, where spinlocks can sleep. So we need to use a raw spinlock
for cgr_lock to ensure we aren’t waiting on a sleeping task.

Although this bug has existed for a while, it was not apparent until
commit ef2a8d5478b9 (“net: dpaa: Adjust queue depth on rate change”)
which invokes smp_call_function_single via qman_update_cgr_safe every
time a link goes up or down.

CNA Affected

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    "vendor": "Linux",
    "product": "Linux",
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        "version": "96f413f47677",
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    ],
    "programFiles": [
      "drivers/soc/fsl/qbman/qman.c"
    ],
    "defaultStatus": "unaffected"
  },
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
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    ],
    "programFiles": [
      "drivers/soc/fsl/qbman/qman.c"
    ],
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]