cve-2024-26899
Vulnerability from cvelistv5
Published
2024-04-17 10:27
Modified
2024-08-02 00:21
Severity
Summary
block: fix deadlock between bd_link_disk_holder and partition scan
References
SourceURLTags
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/03f12122b20b6e6028e9ed69030a49f9cffcbb75Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/1e5c5b0abaee7b62a10b9707a62083b71ad21f62Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/5a87c1f7993bc8ac358a3766bac5dc7126e01e98Patch
Impacted products
VendorProduct
LinuxLinux
LinuxLinux
Show details on NVD website

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                "timestamp": "2024-06-12T16:21:25.318881Z",
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nblock: fix deadlock between bd_link_disk_holder and partition scan\n\n\u0027open_mutex\u0027 of gendisk is used to protect open/close block devices. But\nin bd_link_disk_holder(), it is used to protect the creation of symlink\nbetween holding disk and slave bdev, which introduces some issues.\n\nWhen bd_link_disk_holder() is called, the driver is usually in the process\nof initialization/modification and may suspend submitting io. At this\ntime, any io hold \u0027open_mutex\u0027, such as scanning partitions, can cause\ndeadlocks. For example, in raid:\n\nT1                              T2\nbdev_open_by_dev\n lock open_mutex [1]\n ...\n  efi_partition\n  ...\n   md_submit_bio\n\t\t\t\tmd_ioctl mddev_syspend\n\t\t\t\t  -\u003e suspend all io\n\t\t\t\t md_add_new_disk\n\t\t\t\t  bind_rdev_to_array\n\t\t\t\t   bd_link_disk_holder\n\t\t\t\t    try lock open_mutex [2]\n    md_handle_request\n     -\u003e wait mddev_resume\n\nT1 scan partition, T2 add a new device to raid. T1 waits for T2 to resume\nmddev, but T2 waits for open_mutex held by T1. Deadlock occurs.\n\nFix it by introducing a local mutex \u0027blk_holder_mutex\u0027 to replace\n\u0027open_mutex\u0027."
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    "assignerShortName": "Linux",
    "cveId": "CVE-2024-26899",
    "datePublished": "2024-04-17T10:27:49.089Z",
    "dateReserved": "2024-02-19T14:20:24.187Z",
    "dateUpdated": "2024-08-02T00:21:05.535Z",
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    "nvd": "{\"cve\":{\"id\":\"CVE-2024-26899\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2024-04-17T11:15:10.870\",\"lastModified\":\"2024-04-29T19:34:10.080\",\"vulnStatus\":\"Analyzed\",\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nblock: fix deadlock between bd_link_disk_holder and partition scan\\n\\n\u0027open_mutex\u0027 of gendisk is used to protect open/close block devices. But\\nin bd_link_disk_holder(), it is used to protect the creation of symlink\\nbetween holding disk and slave bdev, which introduces some issues.\\n\\nWhen bd_link_disk_holder() is called, the driver is usually in the process\\nof initialization/modification and may suspend submitting io. At this\\ntime, any io hold \u0027open_mutex\u0027, such as scanning partitions, can cause\\ndeadlocks. For example, in raid:\\n\\nT1                              T2\\nbdev_open_by_dev\\n lock open_mutex [1]\\n ...\\n  efi_partition\\n  ...\\n   md_submit_bio\\n\\t\\t\\t\\tmd_ioctl mddev_syspend\\n\\t\\t\\t\\t  -\u003e suspend all io\\n\\t\\t\\t\\t md_add_new_disk\\n\\t\\t\\t\\t  bind_rdev_to_array\\n\\t\\t\\t\\t   bd_link_disk_holder\\n\\t\\t\\t\\t    try lock open_mutex [2]\\n    md_handle_request\\n     -\u003e wait mddev_resume\\n\\nT1 scan partition, T2 add a new device to raid. T1 waits for T2 to resume\\nmddev, but T2 waits for open_mutex held by T1. Deadlock occurs.\\n\\nFix it by introducing a local mutex \u0027blk_holder_mutex\u0027 to replace\\n\u0027open_mutex\u0027.\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: bloque: soluciona el punto muerto entre bd_link_disk_holder y el an\u00e1lisis de partici\u00f3n. \u0027open_mutex\u0027 de gendisk se utiliza para proteger dispositivos de bloqueo de apertura/cierre. Pero en bd_link_disk_holder(), se utiliza para proteger la creaci\u00f3n de un enlace simb\u00f3lico entre el disco de retenci\u00f3n y el bdev esclavo, lo que introduce algunos problemas. Cuando se llama a bd_link_disk_holder(), el controlador generalmente est\u00e1 en el proceso de inicializaci\u00f3n/modificaci\u00f3n y puede suspender el env\u00edo de io. En este momento, cualquier retenci\u00f3n de io \u0027open_mutex\u0027, como escanear particiones, puede causar interbloqueos. Por ejemplo, en raid: T1 T2 bdev_open_by_dev lock open_mutex [1] ... efi_partition ... md_submit_bio md_ioctl mddev_syspend -\u0026gt; suspender todo io md_add_new_disk bind_rdev_to_array bd_link_disk_holder try lock open_mutex [2] md_handle_request -\u0026gt; esperar mddev_resume T1 escanear partici\u00f3n, agregar un Nuevo dispositivo para atacar. T1 espera a que T2 reanude mddev, pero T2 espera a open_mutex retenido por T1. Se produce un punto muerto. Solucionarlo introduciendo un mutex local \u0027blk_holder_mutex\u0027 para reemplazar \u0027open_mutex\u0027.\"}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\",\"baseScore\":5.5,\"baseSeverity\":\"MEDIUM\"},\"exploitabilityScore\":1.8,\"impactScore\":3.6}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-667\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.7\",\"versionEndExcluding\":\"6.7.11\",\"matchCriteriaId\":\"9B95D3A6-E162-47D5-ABFC-F3FA74FA7CFD\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.8\",\"versionEndExcluding\":\"6.8.2\",\"matchCriteriaId\":\"543A75FF-25B8-4046-A514-1EA8EDD87AB1\"}]}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/03f12122b20b6e6028e9ed69030a49f9cffcbb75\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/1e5c5b0abaee7b62a10b9707a62083b71ad21f62\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/5a87c1f7993bc8ac358a3766bac5dc7126e01e98\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]}]}}"
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