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PCI: Add missing bridge lock to pci_bus_lock()

Type: advisorySource: Official CVE List1 source record

In the Linux kernel, the following vulnerability has been resolved: PCI: Add missing bridge lock to pci_bus_lock() One of the true positives that the cfg_access_lock lockdep effort identified is this sequence: WARNING: CPU: 14 PID: 1 at drivers/pci/pci.c:4886 pci_bridge_secondary_bus_reset+0x5d/0x70 RIP: 0010:pci_bridge_secondary_bus_reset+0x5d/0x70 Call Trace: ? __warn+0x8c/0x190 ? pci_bridge_secondary_bus_reset+0x5d/0x70 ? report_bug+0x1f8/0x200 ? handle_bug+0x3c/0x70 ? exc_invalid_op+0x18/0x70 ? asm_exc_invalid_op+0x1a/0x20 ? pci_bridge_secondary_bus_reset+0x5d/0x70 pci_reset_bus+0x1d8/0x270 vmd_probe+0x778/0xa10 pci_device_probe+0x95/0x120 Where pci_reset_bus() users are triggering unlocked secondary bus resets. Ironically pci_bus_reset(), several calls down from pci_reset_bus(), uses pci_bus_lock() before issuing the reset which locks everything *but* the bridge itself. For the same motivation as adding: bridge = pci_upstream_bridge(dev); if (bridge) pci_dev_lock(bridge); to pci_reset_function() for the "bus" and "cxl_bus" reset cases, add pci_dev_lock() for @bus->self to pci_bus_lock(). [bhelgaas: squash in recursive locking deadlock fix from Keith Busch: https://lore.kernel.org/r/20240711193650.701834-1-kbusch@meta.com]

Announced Source revision 1
Original source ↗

CVE-2024-46750

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: cve:CVE-2024-46750

Linux

Source reference: /containers/cna/affected/0/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Linux

Source reference: /containers/cna/affected/1/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "090a3c5322e900f468b3205b76d0837003ad57b2",
        "lessThan": "0790b89c7e911003b8c50ae50e3ac7645de1fae9",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "090a3c5322e900f468b3205b76d0837003ad57b2",
        "lessThan": "df77a678c33871a6e4ac5b54a71662f1d702335b",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "090a3c5322e900f468b3205b76d0837003ad57b2",
        "lessThan": "e2355d513b89a2cb511b4ded0deb426cdb01acd0",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "090a3c5322e900f468b3205b76d0837003ad57b2",
        "lessThan": "04e85a3285b0e5c5af6fd2c0fd6e95ffecc01945",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "090a3c5322e900f468b3205b76d0837003ad57b2",
        "lessThan": "7253b4fed46471cc247c6cacefac890a8472c083",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "090a3c5322e900f468b3205b76d0837003ad57b2",
        "lessThan": "78c6e39fef5c428960aff742149bba302dd46f5a",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "090a3c5322e900f468b3205b76d0837003ad57b2",
        "lessThan": "81c68e218ab883dfa368460a59b674084c0240da",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "090a3c5322e900f468b3205b76d0837003ad57b2",
        "lessThan": "a4e772898f8bf2e7e1cf661a12c60a5612c4afab",
        "versionType": "git"
      }
    ],
    "programFiles": [
      "drivers/pci/pci.c"
    ],
    "defaultStatus": "unaffected"
  },
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "3.12"
      },
      {
        "status": "unaffected",
        "version": "0",
        "lessThan": "3.12",
        "versionType": "semver"
      },
      {
        "status": "unaffected",
        "version": "4.19.322",
        "versionType": "semver",
        "lessThanOrEqual": "4.19.*"
      },
      {
        "status": "unaffected",
        "version": "5.4.284",
        "versionType": "semver",
        "lessThanOrEqual": "5.4.*"
      },
      {
        "status": "unaffected",
        "version": "5.10.226",
        "versionType": "semver",
        "lessThanOrEqual": "5.10.*"
      },
      {
        "status": "unaffected",
        "version": "5.15.167",
        "versionType": "semver",
        "lessThanOrEqual": "5.15.*"
      },
      {
        "status": "unaffected",
        "version": "6.1.110",
        "versionType": "semver",
        "lessThanOrEqual": "6.1.*"
      },
      {
        "status": "unaffected",
        "version": "6.6.51",
        "versionType": "semver",
        "lessThanOrEqual": "6.6.*"
      },
      {
        "status": "unaffected",
        "version": "6.10.10",
        "versionType": "semver",
        "lessThanOrEqual": "6.10.*"
      },
      {
        "status": "unaffected",
        "version": "6.11",
        "versionType": "original_commit_for_fix",
        "lessThanOrEqual": "*"
      }
    ],
    "programFiles": [
      "drivers/pci/pci.c"
    ],
    "defaultStatus": "affected"
  }
]
Related CVEs
CVE-2024-46750

Source reference: /cveMetadata/cveId

Publisher severity

high

Source reference: /containers/cna/metrics

Event
#26716 · Revision 1
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Publisher date
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