CVE-2026-93205
Description
AI Translation Available
In the Linux kernel, the following vulnerability has been resolved:
iommu/arm-smmu-v3: Manage teardown with devm
arm_smmu_device_remove() manually frees the IOPF queue, destroys the
vmid_map and disables the device, while the IRQs and queues are devm
managed. devm unwinds only after remove() returns, so the cleanup runs
in the wrong order. The IOPF queue is freed before the event-queue IRQ
whose handler uses it.
Manage all of it with devm so the unwind order is correct. Free the IOPF
queue and vmid_map via devm actions, and disable the device from one
registered after arm_smmu_device_reset().
This is also a prerequisite for fixing a Tegra241 CMDQV CMD_SYNC
use-after-free in the subsequent patch.
https://git.kernel.org/stable/c/2235eafda9b3df9295efd0593cd4a8977440c3f6
https://git.kernel.org/stable/c/2bd22a0d40503a65d243b011de146603c8ce1cbc
https://git.kernel.org/stable/c/78fd5a2d65f3546cb4285f8e52f445baecbd00e0
https://git.kernel.org/stable/c/981686f4137760a16a03c5193f11d85133533f93