CVE-2023-52617 (GCVE-0-2023-52617)
Vulnerability from cvelistv5
Published
2024-03-18 10:19
Modified
2026-05-11 19:30
Severity ?
4.4 (Medium) - CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
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 Version: f7eb7b8a4f72b0d9dea69b09f58185ffab97fd35
Version: f7eb7b8a4f72b0d9dea69b09f58185ffab97fd35
Version: f7eb7b8a4f72b0d9dea69b09f58185ffab97fd35
Version: f7eb7b8a4f72b0d9dea69b09f58185ffab97fd35
Version: f7eb7b8a4f72b0d9dea69b09f58185ffab97fd35
Version: f7eb7b8a4f72b0d9dea69b09f58185ffab97fd35
Version: f7eb7b8a4f72b0d9dea69b09f58185ffab97fd35
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