KVM: interrupt kvm_gmem_populate() on signals
kvm_gmem_populate() is a potentially lengthy operation that can involve
multiple calls to the firmware. Interrupt it if a signal arrives.
Fixes: 1f6c06b177
("KVM: guest_memfd: Add interface for populating gmem pages with user data")
Cc: Isaku Yamahata <isaku.yamahata@intel.com>
Cc: Michael Roth <michael.roth@amd.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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@ -629,6 +629,11 @@ long kvm_gmem_populate(struct kvm *kvm, gfn_t start_gfn, void __user *src, long
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gfn_t gfn = start_gfn + i;
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kvm_pfn_t pfn;
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if (signal_pending(current)) {
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ret = -EINTR;
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break;
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}
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ret = __kvm_gmem_get_pfn(file, slot, gfn, &pfn, &max_order, false);
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if (ret)
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break;
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