cve-2024-26807
Vulnerability from cvelistv5
Published
2024-04-04 08:20
Modified
2024-09-11 17:33
Severity
Summary
spi: cadence-qspi: fix pointer reference in runtime PM hooks
References
SourceURLTags
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/03f1573c9587029730ca68503f5062105b122f61
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/32ce3bb57b6b402de2aec1012511e7ac4e7449dc
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/34e1d5c4407c78de0e3473e1fbf8fb74dbe66d03
Impacted products
VendorProduct
LinuxLinux
LinuxLinux
Show details on NVD website

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                "id": "CVE-2024-26807",
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nBoth cadence-quadspi -\u003eruntime_suspend() and -\u003eruntime_resume()\nimplementations start with:\n\n\tstruct cqspi_st *cqspi = dev_get_drvdata(dev);\n\tstruct spi_controller *host = dev_get_drvdata(dev);\n\nThis obviously cannot be correct, unless \"struct cqspi_st\" is the\nfirst member of \" struct spi_controller\", or the other way around, but\nit is not the case. \"struct spi_controller\" is allocated by\ndevm_spi_alloc_host(), which allocates an extra amount of memory for\nprivate data, used to store \"struct cqspi_st\".\n\nThe -\u003eprobe() function of the cadence-quadspi driver then sets the\ndevice drvdata to store the address of the \"struct cqspi_st\"\nstructure. Therefore:\n\n\tstruct cqspi_st *cqspi = dev_get_drvdata(dev);\n\nis correct, but:\n\n\tstruct spi_controller *host = dev_get_drvdata(dev);\n\nis not, as it makes \"host\" point not to a \"struct spi_controller\" but\nto the same \"struct cqspi_st\" structure as above.\n\nThis obviously leads to bad things (memory corruption, kernel crashes)\ndirectly during -\u003eprobe(), as -\u003eprobe() enables the device using PM\nruntime, leading the -\u003eruntime_resume() hook being called, which in\nturns calls spi_controller_resume() with the wrong pointer.\n\nThis has at least been reported [0] to cause a kernel crash, but the\nexact behavior will depend on the memory contents.\n\n[0] https://lore.kernel.org/all/20240226121803.5a7r5wkpbbowcxgx@dhruva/\n\nThis issue potentially affects all platforms that are currently using\nthe cadence-quadspi driver."
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    "datePublished": "2024-04-04T08:20:34.155Z",
    "dateReserved": "2024-02-19T14:20:24.179Z",
    "dateUpdated": "2024-09-11T17:33:46.008Z",
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    "nvd": "{\"cve\":{\"id\":\"CVE-2024-26807\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2024-04-04T09:15:09.380\",\"lastModified\":\"2024-06-20T10:15:09.303\",\"vulnStatus\":\"Awaiting Analysis\",\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nBoth cadence-quadspi -\u003eruntime_suspend() and -\u003eruntime_resume()\\nimplementations start with:\\n\\n\\tstruct cqspi_st *cqspi = dev_get_drvdata(dev);\\n\\tstruct spi_controller *host = dev_get_drvdata(dev);\\n\\nThis obviously cannot be correct, unless \\\"struct cqspi_st\\\" is the\\nfirst member of \\\" struct spi_controller\\\", or the other way around, but\\nit is not the case. \\\"struct spi_controller\\\" is allocated by\\ndevm_spi_alloc_host(), which allocates an extra amount of memory for\\nprivate data, used to store \\\"struct cqspi_st\\\".\\n\\nThe -\u003eprobe() function of the cadence-quadspi driver then sets the\\ndevice drvdata to store the address of the \\\"struct cqspi_st\\\"\\nstructure. Therefore:\\n\\n\\tstruct cqspi_st *cqspi = dev_get_drvdata(dev);\\n\\nis correct, but:\\n\\n\\tstruct spi_controller *host = dev_get_drvdata(dev);\\n\\nis not, as it makes \\\"host\\\" point not to a \\\"struct spi_controller\\\" but\\nto the same \\\"struct cqspi_st\\\" structure as above.\\n\\nThis obviously leads to bad things (memory corruption, kernel crashes)\\ndirectly during -\u003eprobe(), as -\u003eprobe() enables the device using PM\\nruntime, leading the -\u003eruntime_resume() hook being called, which in\\nturns calls spi_controller_resume() with the wrong pointer.\\n\\nThis has at least been reported [0] to cause a kernel crash, but the\\nexact behavior will depend on the memory contents.\\n\\n[0] https://lore.kernel.org/all/20240226121803.5a7r5wkpbbowcxgx@dhruva/\\n\\nThis issue potentially affects all platforms that are currently using\\nthe cadence-quadspi driver.\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: spi: cadence-qspi: corrige la referencia del puntero en los ganchos PM en tiempo de ejecuci\u00f3n dev_get_drvdata() se utiliza para adquirir el puntero a cqspi y el controlador SPI. Ninguno de los dos integra al otro; Esto conduce a la corrupci\u00f3n de la memoria. En una plataforma determinada (Mobileye EyeQ5), la corrupci\u00f3n de la memoria est\u00e1 oculta dentro de cqspi-\u0026gt;f_pdata. Adem\u00e1s, esta memoria no inicializada se utiliza como mutex (ctlr-\u0026gt;bus_lock_mutex) por spi_controller_suspend().\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/03f1573c9587029730ca68503f5062105b122f61\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/32ce3bb57b6b402de2aec1012511e7ac4e7449dc\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/34e1d5c4407c78de0e3473e1fbf8fb74dbe66d03\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
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