Description (CNA)
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
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected f7eb7b8a4f72b0d9dea69b09f58185ffab97fd35 before d8c293549946ee5078ed0ab77793cec365559355; affected f7eb7b8a4f72b0d9dea69b09f58185ffab97fd35 before 4a5d0528cf19dbf060313dffbe047bc11c90c24c; affected f7eb7b8a4f72b0d9dea69b09f58185ffab97fd35 before ff1c7e2fb9e9c3f53715fbe04d3ac47b80be7eb8; affected f7eb7b8a4f72b0d9dea69b09f58185ffab97fd35 before 1d83c85922647758c1f1e4806a4c5c3cf591a20a; affected f7eb7b8a4f72b0d9dea69b09f58185ffab97fd35 before 0233b836312e39a3c763fb53512b3fa455b473b3; affected f7eb7b8a4f72b0d9dea69b09f58185ffab97fd35 before e129c7fa7070fbce57feb0bfc5eaa65eef44b693; affected f7eb7b8a4f72b0d9dea69b09f58185ffab97fd35 before df25461119d987b8c81d232cfe4411e91dcabe66 |
| Linux / Linux | affected 5.0; unaffected 0 before 5.0; unaffected 5.4.269 through 5.4.*; unaffected 5.10.210 through 5.10.*; unaffected 5.15.149 through 5.15.*; unaffected 6.1.77 through 6.1.*; unaffected 6.6.16 through 6.6.*; unaffected 6.7.4 through 6.7.*; unaffected 6.8 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/d8c293549946ee5078ed0ab77793cec365559355
- https://git.kernel.org/stable/c/4a5d0528cf19dbf060313dffbe047bc11c90c24c
- https://git.kernel.org/stable/c/ff1c7e2fb9e9c3f53715fbe04d3ac47b80be7eb8
- https://git.kernel.org/stable/c/1d83c85922647758c1f1e4806a4c5c3cf591a20a
- https://git.kernel.org/stable/c/0233b836312e39a3c763fb53512b3fa455b473b3
- https://git.kernel.org/stable/c/e129c7fa7070fbce57feb0bfc5eaa65eef44b693
- https://git.kernel.org/stable/c/df25461119d987b8c81d232cfe4411e91dcabe66
ADP enrichment
No English description supplied.
No references supplied.
No English description supplied.
- https://git.kernel.org/stable/c/d8c293549946ee5078ed0ab77793cec365559355
- https://git.kernel.org/stable/c/4a5d0528cf19dbf060313dffbe047bc11c90c24c
- https://git.kernel.org/stable/c/ff1c7e2fb9e9c3f53715fbe04d3ac47b80be7eb8
- https://git.kernel.org/stable/c/1d83c85922647758c1f1e4806a4c5c3cf591a20a
- https://git.kernel.org/stable/c/0233b836312e39a3c763fb53512b3fa455b473b3
- https://git.kernel.org/stable/c/e129c7fa7070fbce57feb0bfc5eaa65eef44b693
- https://git.kernel.org/stable/c/df25461119d987b8c81d232cfe4411e91dcabe66
- https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html