fkie_cve-2023-52617
Vulnerability from fkie_nvd
Published
2024-03-18 11:15
Modified
2025-04-08 15:26
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved:
PCI: switchtec: Fix stdev_release() crash after surprise hot remove
A PCI device hot removal may occur while stdev->cdev is held open. The call
to stdev_release() then happens during close or exit, at a point way past
switchtec_pci_remove(). Otherwise the last ref would vanish with the
trailing put_device(), just before return.
At that later point in time, the devm cleanup has already removed the
stdev->mmio_mrpc mapping. Also, the stdev->pdev reference was not a counted
one. Therefore, in DMA mode, the iowrite32() in stdev_release() will cause
a fatal page fault, and the subsequent dma_free_coherent(), if reached,
would pass a stale &stdev->pdev->dev pointer.
Fix by moving MRPC DMA shutdown into switchtec_pci_remove(), after
stdev_kill(). Counting the stdev->pdev ref is now optional, but may prevent
future accidents.
Reproducible via the script at
https://lore.kernel.org/r/20231113212150.96410-1-dns@arista.com
References
Impacted products
| Vendor | Product | Version | |
|---|---|---|---|
| linux | linux_kernel | * | |
| linux | linux_kernel | * | |
| linux | linux_kernel | * | |
| linux | linux_kernel | * | |
| linux | linux_kernel | * | |
| linux | linux_kernel | * | |
| debian | debian_linux | 10.0 |
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"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nPCI: switchtec: Fix stdev_release() crash after surprise hot remove\n\nA PCI device hot removal may occur while stdev-\u003ecdev is held open. The call\nto stdev_release() then happens during close or exit, at a point way past\nswitchtec_pci_remove(). Otherwise the last ref would vanish with the\ntrailing put_device(), just before return.\n\nAt that later point in time, the devm cleanup has already removed the\nstdev-\u003emmio_mrpc mapping. Also, the stdev-\u003epdev reference was not a counted\none. Therefore, in DMA mode, the iowrite32() in stdev_release() will cause\na fatal page fault, and the subsequent dma_free_coherent(), if reached,\nwould pass a stale \u0026stdev-\u003epdev-\u003edev pointer.\n\nFix by moving MRPC DMA shutdown into switchtec_pci_remove(), after\nstdev_kill(). Counting the stdev-\u003epdev ref is now optional, but may prevent\nfuture accidents.\n\nReproducible via the script at\nhttps://lore.kernel.org/r/20231113212150.96410-1-dns@arista.com"
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"lang": "es",
"value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: PCI: switchtec: corrige el bloqueo de stdev_release() despu\u00e9s de una eliminaci\u00f3n sorpresa en caliente. Puede ocurrir una eliminaci\u00f3n en caliente del dispositivo PCI mientras stdev-\u0026gt;cdev se mantiene abierto. La llamada a stdev_release() ocurre durante el cierre o la salida, en un punto mucho m\u00e1s all\u00e1 de switchtec_pci_remove(). De lo contrario, la \u00faltima referencia desaparecer\u00eda con el put_device() final, justo antes del retorno. En ese momento posterior, la limpieza devm ya elimin\u00f3 la asignaci\u00f3n stdev-\u0026gt;mmio_mrpc. Adem\u00e1s, la referencia stdev-\u0026gt;pdev no se contaba. Por lo tanto, en modo DMA, iowrite32() en stdev_release() causar\u00e1 un error de p\u00e1gina fatal, y el dma_free_coherent() posterior, si se alcanza, pasar\u00eda un puntero \u0026amp;stdev-\u0026gt;pdev-\u0026gt;dev obsoleto. Para solucionarlo, mueva el apagado de MRPC DMA a switchtec_pci_remove(), despu\u00e9s de stdev_kill(). Contar stdev-\u0026gt;pdev ref ahora es opcional, pero puede evitar accidentes futuros. Reproducible a trav\u00e9s del script en https://lore.kernel.org/r/20231113212150.96410-1-dns@arista.com"
}
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"id": "CVE-2023-52617",
"lastModified": "2025-04-08T15:26:38.597",
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.
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