CVE-2024-40977 wifi: mt76: mt7921s: fix potential hung tasks during chip recovery

2024-07-1212:32:13

Linux

www.cve.org

cve-2024-40977

wifi

mt76

mt7921s

chip recovery

EPSS

Percentile

5.1%

JSON

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

wifi: mt76: mt7921s: fix potential hung tasks during chip recovery

During chip recovery (e.g. chip reset), there is a possible situation that
kernel worker reset_work is holding the lock and waiting for kernel thread
stat_worker to be parked, while stat_worker is waiting for the release of
the same lock.
It causes a deadlock resulting in the dumping of hung tasks messages and
possible rebooting of the device.

This patch prevents the execution of stat_worker during the chip recovery.

CNA Affected

[
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "unaffected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "drivers/net/wireless/mediatek/mt76/mt7921/mac.c",
      "drivers/net/wireless/mediatek/mt76/mt7921/pci_mac.c",
      "drivers/net/wireless/mediatek/mt76/mt7921/sdio_mac.c",
      "drivers/net/wireless/mediatek/mt76/sdio.c"
    ],
    "versions": [
      {
        "version": "1da177e4c3f4",
        "lessThan": "0b81faa05b0b",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "1da177e4c3f4",
        "lessThan": "85edd783f453",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "1da177e4c3f4",
        "lessThan": "e974dd4c22a2",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "1da177e4c3f4",
        "lessThan": "ecf0b2b8a37c",
        "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/net/wireless/mediatek/mt76/mt7921/mac.c",
      "drivers/net/wireless/mediatek/mt76/mt7921/pci_mac.c",
      "drivers/net/wireless/mediatek/mt76/mt7921/sdio_mac.c",
      "drivers/net/wireless/mediatek/mt76/sdio.c"
    ],
    "versions": [
      {
        "version": "6.1.96",
        "lessThanOrEqual": "6.1.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.6.36",
        "lessThanOrEqual": "6.6.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.9.7",
        "lessThanOrEqual": "6.9.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.10",
        "lessThanOrEqual": "*",
        "status": "unaffected",
        "versionType": "original_commit_for_fix"
      }
    ]
  }
]