Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: virtio: break and reset virtio devices on device_shutdown() Hongyu reported a hang on kexec in a VM. QEMU reported invalid memory accesses during the hang. Invalid read at addr 0x102877002, size 2, region '(null)', reason: rejected Invalid write at addr 0x102877A44, size 2, region '(null)', reason: rejected ... It was traced down to virtio-console. Kexec works fine if virtio-console is not in use. The issue is that virtio-console continues to write to the MMIO even after underlying virtio-pci device is reset. Additionally, Eric noticed that IOMMUs are reset before devices, if devices are not reset on shutdown they continue to poke at guest memory and get errors from the IOMMU. Some devices get wedged then. The problem can be solved by breaking all virtio devices on virtio bus shutdown, then resetting them.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected ec3d41c4db4c21164332826ea8d812f94f2f6886 before acdfe206be6c70ec55dc8bfdb1a22036d10fae26; affected ec3d41c4db4c21164332826ea8d812f94f2f6886 before 1eaa83fd94ed5e40d43139025f5acb7bcfed3b5f; affected ec3d41c4db4c21164332826ea8d812f94f2f6886 before aee42f3d57bfa37b2716df4584edeecf63b9df4c; affected ec3d41c4db4c21164332826ea8d812f94f2f6886 before 8bd2fa086a04886798b505f28db4002525895203 |
| Linux / Linux | affected 2.6.24; unaffected 0 before 2.6.24; unaffected 6.6.160 through 6.6.*; unaffected 6.12.114 through 6.12.*; unaffected 6.14.9 through 6.14.*; unaffected 6.15 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/acdfe206be6c70ec55dc8bfdb1a22036d10fae26
- https://git.kernel.org/stable/c/1eaa83fd94ed5e40d43139025f5acb7bcfed3b5f
- https://git.kernel.org/stable/c/aee42f3d57bfa37b2716df4584edeecf63b9df4c
- https://git.kernel.org/stable/c/8bd2fa086a04886798b505f28db4002525895203
ADP enrichment
No English description supplied.
No references supplied.