cve-2021-47416
Vulnerability from cvelistv5
Published
2024-05-21 15:04
Modified
2024-12-19 07:41
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: phy: mdio: fix memory leak Syzbot reported memory leak in MDIO bus interface, the problem was in wrong state logic. MDIOBUS_ALLOCATED indicates 2 states: 1. Bus is only allocated 2. Bus allocated and __mdiobus_register() fails, but device_register() was called In case of device_register() has been called we should call put_device() to correctly free the memory allocated for this device, but mdiobus_free() calls just kfree(dev) in case of MDIOBUS_ALLOCATED state To avoid this behaviour we need to set bus->state to MDIOBUS_UNREGISTERED _before_ calling device_register(), because put_device() should be called even in case of device_register() failure.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/064c2616234a7394867c924b5c1303974f3a4f4dPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/0d2dd40a7be61b89a7c99dae8ee96389d27b413aPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/2250392d930bd0d989f24d355d6355b0150256e7Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/2397b9e118721292429fea8807a698e71b94795fPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/25e9f88c7e3cc35f5e3d3db199660d28a15df639Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/414bb4ead1362ef2c8592db723c017258f213988Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/ca6e11c337daf7925ff8a2aac8e84490a8691905Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/f4f502a04ee1e543825af78f47eb7785015cd9f6Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/064c2616234a7394867c924b5c1303974f3a4f4dPatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/0d2dd40a7be61b89a7c99dae8ee96389d27b413aPatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/2250392d930bd0d989f24d355d6355b0150256e7Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/2397b9e118721292429fea8807a698e71b94795fPatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/25e9f88c7e3cc35f5e3d3db199660d28a15df639Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/414bb4ead1362ef2c8592db723c017258f213988Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/ca6e11c337daf7925ff8a2aac8e84490a8691905Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/f4f502a04ee1e543825af78f47eb7785015cd9f6Patch
Impacted products
Vendor Product Version
Linux Linux Version: 46abc02175b3c246dd5141d878f565a8725060c9
Version: 46abc02175b3c246dd5141d878f565a8725060c9
Version: 46abc02175b3c246dd5141d878f565a8725060c9
Version: 46abc02175b3c246dd5141d878f565a8725060c9
Version: 46abc02175b3c246dd5141d878f565a8725060c9
Version: 46abc02175b3c246dd5141d878f565a8725060c9
Version: 46abc02175b3c246dd5141d878f565a8725060c9
Version: 46abc02175b3c246dd5141d878f565a8725060c9
 Create a notification for this product.
   Linux Linux Version: 2.6.28
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      "containers": "{\"adp\": [{\"title\": \"CVE Program Container\", \"references\": [{\"url\": \"https://git.kernel.org/stable/c/25e9f88c7e3cc35f5e3d3db199660d28a15df639\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/2250392d930bd0d989f24d355d6355b0150256e7\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/f4f502a04ee1e543825af78f47eb7785015cd9f6\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/2397b9e118721292429fea8807a698e71b94795f\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/414bb4ead1362ef2c8592db723c017258f213988\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/0d2dd40a7be61b89a7c99dae8ee96389d27b413a\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/064c2616234a7394867c924b5c1303974f3a4f4d\", \"tags\": [\"x_transferred\"]}, {\"url\": 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\"unaffected\", \"version\": \"4.14.251\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"4.14.*\"}, {\"status\": \"unaffected\", \"version\": \"4.19.211\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"4.19.*\"}, {\"status\": \"unaffected\", \"version\": \"5.4.153\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.4.*\"}, {\"status\": \"unaffected\", \"version\": \"5.10.73\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.10.*\"}, {\"status\": \"unaffected\", \"version\": \"5.14.12\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.14.*\"}, {\"status\": \"unaffected\", \"version\": \"5.15\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"drivers/net/phy/mdio_bus.c\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/25e9f88c7e3cc35f5e3d3db199660d28a15df639\"}, {\"url\": \"https://git.kernel.org/stable/c/2250392d930bd0d989f24d355d6355b0150256e7\"}, {\"url\": 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Bus is only allocated\\n\\t2. Bus allocated and __mdiobus_register() fails, but\\n\\t   device_register() was called\\n\\nIn case of device_register() has been called we should call put_device()\\nto correctly free the memory allocated for this device, but mdiobus_free()\\ncalls just kfree(dev) in case of MDIOBUS_ALLOCATED state\\n\\nTo avoid this behaviour we need to set bus-\u003estate to MDIOBUS_UNREGISTERED\\n_before_ calling device_register(), because put_device() should be\\ncalled even in case of device_register() failure.\"}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2024-12-19T07:41:34.016Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2021-47416\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2024-12-19T07:41:34.016Z\", \"dateReserved\": \"2024-05-21T14:58:30.818Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-05-21T15:04:06.042Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.1"
    }
  }
}


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