cve-2024-36478
Vulnerability from cvelistv5
Published
2024-06-21 10:18
Modified
2024-12-19 09:01
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: null_blk: fix null-ptr-dereference while configuring 'power' and 'submit_queues' Writing 'power' and 'submit_queues' concurrently will trigger kernel panic: Test script: modprobe null_blk nr_devices=0 mkdir -p /sys/kernel/config/nullb/nullb0 while true; do echo 1 > submit_queues; echo 4 > submit_queues; done & while true; do echo 1 > power; echo 0 > power; done Test result: BUG: kernel NULL pointer dereference, address: 0000000000000148 Oops: 0000 [#1] PREEMPT SMP RIP: 0010:__lock_acquire+0x41d/0x28f0 Call Trace: <TASK> lock_acquire+0x121/0x450 down_write+0x5f/0x1d0 simple_recursive_removal+0x12f/0x5c0 blk_mq_debugfs_unregister_hctxs+0x7c/0x100 blk_mq_update_nr_hw_queues+0x4a3/0x720 nullb_update_nr_hw_queues+0x71/0xf0 [null_blk] nullb_device_submit_queues_store+0x79/0xf0 [null_blk] configfs_write_iter+0x119/0x1e0 vfs_write+0x326/0x730 ksys_write+0x74/0x150 This is because del_gendisk() can concurrent with blk_mq_update_nr_hw_queues(): nullb_device_power_store nullb_apply_submit_queues null_del_dev del_gendisk nullb_update_nr_hw_queues if (!dev->nullb) // still set while gendisk is deleted return 0 blk_mq_update_nr_hw_queues dev->nullb = NULL Fix this problem by resuing the global mutex to protect nullb_device_power_store() and nullb_update_nr_hw_queues() from configfs.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/1d4c8baef435c98e8d5aa7027dc5a9f70834ba16
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/5d0495473ee4c1d041b5a917f10446a22c047f47Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/a2db328b0839312c169eb42746ec46fc1ab53ed2Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/aaadb755f2d684f715a6eb85cb7243aa0c67dfa9
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/5d0495473ee4c1d041b5a917f10446a22c047f47Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/a2db328b0839312c169eb42746ec46fc1ab53ed2Patch
Impacted products
Vendor Product Version
Linux Linux Version: 5.5
Show details on NVD website

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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnull_blk: fix null-ptr-dereference while configuring \u0027power\u0027 and \u0027submit_queues\u0027\n\nWriting \u0027power\u0027 and \u0027submit_queues\u0027 concurrently will trigger kernel\npanic:\n\nTest script:\n\nmodprobe null_blk nr_devices=0\nmkdir -p /sys/kernel/config/nullb/nullb0\nwhile true; do echo 1 \u003e submit_queues; echo 4 \u003e submit_queues; done \u0026\nwhile true; do echo 1 \u003e power; echo 0 \u003e power; done\n\nTest result:\n\nBUG: kernel NULL pointer dereference, address: 0000000000000148\nOops: 0000 [#1] PREEMPT SMP\nRIP: 0010:__lock_acquire+0x41d/0x28f0\nCall Trace:\n \u003cTASK\u003e\n lock_acquire+0x121/0x450\n down_write+0x5f/0x1d0\n simple_recursive_removal+0x12f/0x5c0\n blk_mq_debugfs_unregister_hctxs+0x7c/0x100\n blk_mq_update_nr_hw_queues+0x4a3/0x720\n nullb_update_nr_hw_queues+0x71/0xf0 [null_blk]\n nullb_device_submit_queues_store+0x79/0xf0 [null_blk]\n configfs_write_iter+0x119/0x1e0\n vfs_write+0x326/0x730\n ksys_write+0x74/0x150\n\nThis is because del_gendisk() can concurrent with\nblk_mq_update_nr_hw_queues():\n\nnullb_device_power_store\tnullb_apply_submit_queues\n null_del_dev\n del_gendisk\n\t\t\t\t nullb_update_nr_hw_queues\n\t\t\t\t  if (!dev-\u003enullb)\n\t\t\t\t  // still set while gendisk is deleted\n\t\t\t\t   return 0\n\t\t\t\t  blk_mq_update_nr_hw_queues\n dev-\u003enullb = NULL\n\nFix this problem by resuing the global mutex to protect\nnullb_device_power_store() and nullb_update_nr_hw_queues() from configfs."
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      "title": "null_blk: fix null-ptr-dereference while configuring \u0027power\u0027 and \u0027submit_queues\u0027",
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    "cveId": "CVE-2024-36478",
    "datePublished": "2024-06-21T10:18:09.027Z",
    "dateReserved": "2024-06-21T10:13:16.284Z",
    "dateUpdated": "2024-12-19T09:01:09.541Z",
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    "nvd": "{\"cve\":{\"id\":\"CVE-2024-36478\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2024-06-21T11:15:10.360\",\"lastModified\":\"2024-12-02T08:15:05.787\",\"vulnStatus\":\"Modified\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nnull_blk: fix null-ptr-dereference while configuring \u0027power\u0027 and \u0027submit_queues\u0027\\n\\nWriting \u0027power\u0027 and \u0027submit_queues\u0027 concurrently will trigger kernel\\npanic:\\n\\nTest script:\\n\\nmodprobe null_blk nr_devices=0\\nmkdir -p /sys/kernel/config/nullb/nullb0\\nwhile true; do echo 1 \u003e submit_queues; echo 4 \u003e submit_queues; done \u0026\\nwhile true; do echo 1 \u003e power; echo 0 \u003e power; done\\n\\nTest result:\\n\\nBUG: kernel NULL pointer dereference, address: 0000000000000148\\nOops: 0000 [#1] PREEMPT SMP\\nRIP: 0010:__lock_acquire+0x41d/0x28f0\\nCall Trace:\\n \u003cTASK\u003e\\n lock_acquire+0x121/0x450\\n down_write+0x5f/0x1d0\\n simple_recursive_removal+0x12f/0x5c0\\n blk_mq_debugfs_unregister_hctxs+0x7c/0x100\\n blk_mq_update_nr_hw_queues+0x4a3/0x720\\n nullb_update_nr_hw_queues+0x71/0xf0 [null_blk]\\n nullb_device_submit_queues_store+0x79/0xf0 [null_blk]\\n configfs_write_iter+0x119/0x1e0\\n vfs_write+0x326/0x730\\n ksys_write+0x74/0x150\\n\\nThis is because del_gendisk() can concurrent with\\nblk_mq_update_nr_hw_queues():\\n\\nnullb_device_power_store\\tnullb_apply_submit_queues\\n null_del_dev\\n del_gendisk\\n\\t\\t\\t\\t nullb_update_nr_hw_queues\\n\\t\\t\\t\\t  if (!dev-\u003enullb)\\n\\t\\t\\t\\t  // still set while gendisk is deleted\\n\\t\\t\\t\\t   return 0\\n\\t\\t\\t\\t  blk_mq_update_nr_hw_queues\\n dev-\u003enullb = NULL\\n\\nFix this problem by resuing the global mutex to protect\\nnullb_device_power_store() and nullb_update_nr_hw_queues() from configfs.\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: null_blk: corrige la dereferencia null-ptr al configurar \u0027power\u0027 y \u0027submit_queues\u0027. Escribir \u0027power\u0027 y \u0027submit_queues\u0027 simult\u00e1neamente provocar\u00e1 un p\u00e1nico en el kernel: Script de prueba: modprobe null_blk nr_devices= 0 mkdir -p /sys/kernel/config/nullb/nullb0 mientras sea verdadero; hacer eco 1 \u0026gt; enviar_queues; eco 4 \u0026gt; enviar_colas; hecho y mientras sea cierto; hacer eco 1 \u0026gt; potencia; eco 0 \u0026gt; potencia; hecho Resultado de la prueba: ERROR: desreferencia del puntero NULL del kernel, direcci\u00f3n: 0000000000000148 Ups: 0000 [#1] RIP SMP PREEMPLEADO: 0010:__lock_acquire+0x41d/0x28f0 Seguimiento de llamada:  lock_acquire+0x121/0x450 down_write+0x5f/0x1d0 simple_recursive _eliminaci\u00f3n+ 0x12f/0x5c0 blk_mq_debugfs_unregister_hctxs+0x7c/0x100 blk_mq_update_nr_hw_queues+0x4a3/0x720 nullb_update_nr_hw_queues+0x71/0xf0 [null_blk] /0xf0 [null_blk] configfs_write_iter+0x119/0x1e0 vfs_write+0x326/0x730 ksys_write+0x74/0x150 Esto se debe a que del_gendisk() puede concurrente con blk_mq_update_nr_hw_queues(): nullb_device_power_store nullb_apply_submit_queues null_del_dev del_gendisk nullb_update_nr_hw_queues if (!dev-\u0026gt;nullb) // todav\u00eda est\u00e1 configurado mientras se elimina gendisk return 0 blk_mq_update_nr_hw_queues dev-\u0026gt;nullb = NULL Fix este problema reutilizando el mutex global para proteger nullb_device_power_store() y nullb_update_nr_hw_queues() de configfs.\"}],\"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\",\"baseScore\":5.5,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":3.6}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-476\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.5\",\"versionEndExcluding\":\"6.9.4\",\"matchCriteriaId\":\"BA9EDDA6-4A33-4936-9152-D0D896107EF8\"}]}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/1d4c8baef435c98e8d5aa7027dc5a9f70834ba16\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/5d0495473ee4c1d041b5a917f10446a22c047f47\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/a2db328b0839312c169eb42746ec46fc1ab53ed2\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/aaadb755f2d684f715a6eb85cb7243aa0c67dfa9\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/5d0495473ee4c1d041b5a917f10446a22c047f47\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/a2db328b0839312c169eb42746ec46fc1ab53ed2\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\"]}]}}"
  }
}


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