On 08.07.26 10:18, Val Packett wrote:
Starting a virtio backend in a PV domain would panic the kernel in alloc_ioreq, trying to dereference vma->vm_private_data as a pages pointer when in reality it stayed as PRIV_VMA_LOCKED.Avoid crashing by handling the PRIV_VMA_LOCKED case in alloc_ioreq. PV support requires mapping the virtio ioreq page explicitly into the kernel's page tables, so do it on-demand when PRIV_VMA_LOCKED is seen. Signed-off-by: Val Packett <[email protected]>
Reviewed-by: Juergen Gross <[email protected]> Juergen
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