CVE-2024-46761
Vulnerability from cvelistv5
Published
2024-09-18 07:12
Modified
2024-12-19 09:22
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: pci/hotplug/pnv_php: Fix hotplug driver crash on Powernv The hotplug driver for powerpc (pci/hotplug/pnv_php.c) causes a kernel crash when we try to hot-unplug/disable the PCIe switch/bridge from the PHB. The crash occurs because although the MSI data structure has been released during disable/hot-unplug path and it has been assigned with NULL, still during unregistration the code was again trying to explicitly disable the MSI which causes the NULL pointer dereference and kernel crash. The patch fixes the check during unregistration path to prevent invoking pci_disable_msi/msix() since its data structure is already freed.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/335e35b748527f0c06ded9eebb65387f60647fdaPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/438d522227374042b5c8798f8ce83bbe479dca4dPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/4eb4085c1346d19d4a05c55246eb93e74e671048Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/b82d4d5c736f4fd2ed224c35f554f50d1953d21ePatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/bc1faed19db95abf0933b104910a3fb01b138f59Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/bfc44075b19740d372f989f21dd03168bfda0689Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/c0d8094dc740cfacf3775bbc6a1c4720459e8de4Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/c4c681999d385e28f84808bbf3a85ea8e982da55Patch
Impacted products
Vendor Product Version
Linux Linux
Show details on NVD website

To clipboard 

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    "dateReserved": "2024-09-11T15:12:18.272Z",
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El fallo se produce porque, aunque la estructura de datos MSI se ha liberado durante la ruta de deshabilitaci\u00f3n/desconexi\u00f3n en caliente y se le ha asignado NULL, a\u00fan durante la anulaci\u00f3n del registro el c\u00f3digo estaba intentando de nuevo deshabilitar expl\u00edcitamente el MSI, lo que provoca la desreferencia del puntero NULL y el fallo del kernel. 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  }
}


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