On 13/02/2018 16:14, Christian Borntraeger wrote: > On 02/08/2018 10:35 PM, David Rientjes wrote: >> The KVM_SET_GSI_ROUTING ioctl does a vmalloc() of >> sizeof(struct kvm_irq_routing_entry) multiplied by a user-supplied value. >> This can be up to 4096 entries on architectures such as arm64 and s390 >> (and the upper bound may be increased on s390 eventually). >> >> This can produce a vmalloc allocation failure warning: >> > [...] >> kvm_vm_ioctl+0x910/0x15e0 arch/x86/kvm/../../../virt/kvm/kvm_main.c:4153 > > ^^^^^ > >> @@ -3063,7 +3063,8 @@ static long kvm_vm_ioctl(struct file *filp, > > ^^^^^ > > > Are you sure that you got the right vmalloc? Nice catch! But well, it's the only one in the whole file. :) That seems very much like an old patch then. I'm unqueuing it. Paolo
