[+cc Marcin]
On Mon, Oct 14, 2024 at 09:39:20AM +0800, Baolu Lu wrote:
On 2024/10/12 11:07, Lu Baolu wrote:
Previously, the domain_context_clear() function incorrectly called pci_for_each_dma_alias() to set up context entries for non-PCI devices. This could lead to kernel hangs or other unexpected behavior.
Add a check to only call pci_for_each_dma_alias() for PCI devices. For non-PCI devices, domain_context_clear_one() is called directly.
Reported-by: Todd Brandttodd.e.brandt@intel.com Closes:https://bugzilla.kernel.org/show_bug.cgi?id=219363 Fixes: 9a16ab9d6402 ("iommu/vt-d: Make context clearing consistent with context mapping") Cc:stable@vger.kernel.org Signed-off-by: Lu Baolubaolu.lu@linux.intel.com
drivers/iommu/intel/iommu.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-)
Queued for v6.12-rc.
Please include information about Marcin's report as well (assuming it is the same problem). Marcin did a LOT of work to report and bisect this, so both should be acknowledged here.
See https://bugzilla.kernel.org/show_bug.cgi?id=219349
Bjorn