CVE-2024-26807
Vulnerability from cvelistv5
Published
2024-04-04 08:20
Modified
2024-12-19 08:47
Severity ?
Summary
spi: cadence-qspi: fix pointer reference in runtime PM hooks
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/03f1573c9587029730ca68503f5062105b122f61Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/32ce3bb57b6b402de2aec1012511e7ac4e7449dcPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/34e1d5c4407c78de0e3473e1fbf8fb74dbe66d03Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/03f1573c9587029730ca68503f5062105b122f61Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/32ce3bb57b6b402de2aec1012511e7ac4e7449dcPatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/34e1d5c4407c78de0e3473e1fbf8fb74dbe66d03Patch
Impacted products
LinuxLinux
LinuxLinux
Show details on NVD website

To clipboard 

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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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    "dateReserved": "2024-02-19T14:20:24.179Z",
    "dateUpdated": "2024-12-19T08:47:51.037Z",
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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. 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