From d81473840ce12fe682c19af9b4b5b39a9fe5a4c9 Mon Sep 17 00:00:00 2001 From: Paolo Bonzini Date: Fri, 7 Jun 2024 18:10:29 +0200 Subject: [PATCH] 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: 1f6c06b177513 ("KVM: guest_memfd: Add interface for populating gmem pages with user data") Cc: Isaku Yamahata Cc: Michael Roth Signed-off-by: Paolo Bonzini --- virt/kvm/guest_memfd.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/virt/kvm/guest_memfd.c b/virt/kvm/guest_memfd.c index 9714add38852..3bfe1824ec2d 100644 --- a/virt/kvm/guest_memfd.c +++ b/virt/kvm/guest_memfd.c @@ -629,6 +629,11 @@ long kvm_gmem_populate(struct kvm *kvm, gfn_t start_gfn, void __user *src, long gfn_t gfn = start_gfn + i; kvm_pfn_t pfn; + if (signal_pending(current)) { + ret = -EINTR; + break; + } + ret = __kvm_gmem_get_pfn(file, slot, gfn, &pfn, &max_order, false); if (ret) break;