From 7ec28e264f2e52089c14c6f8eba1ce7b6501e59b Mon Sep 17 00:00:00 2001 From: Denis Efremov Date: Wed, 3 Jun 2020 13:11:31 +0300 Subject: KVM: Use vmemdup_user() Replace opencoded alloc and copy with vmemdup_user(). Signed-off-by: Denis Efremov Message-Id: <20200603101131.2107303-1-efremov@linux.com> Signed-off-by: Paolo Bonzini --- virt/kvm/kvm_main.c | 19 ++++++++----------- 1 file changed, 8 insertions(+), 11 deletions(-) (limited to 'virt/kvm') diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c index 3577eb84eac0..4db151f6101e 100644 --- a/virt/kvm/kvm_main.c +++ b/virt/kvm/kvm_main.c @@ -3746,21 +3746,18 @@ static long kvm_vm_ioctl(struct file *filp, if (routing.flags) goto out; if (routing.nr) { - r = -ENOMEM; - entries = vmalloc(array_size(sizeof(*entries), - routing.nr)); - if (!entries) - goto out; - r = -EFAULT; urouting = argp; - if (copy_from_user(entries, urouting->entries, - routing.nr * sizeof(*entries))) - goto out_free_irq_routing; + entries = vmemdup_user(urouting->entries, + array_size(sizeof(*entries), + routing.nr)); + if (IS_ERR(entries)) { + r = PTR_ERR(entries); + goto out; + } } r = kvm_set_irq_routing(kvm, entries, routing.nr, routing.flags); -out_free_irq_routing: - vfree(entries); + kvfree(entries); break; } #endif /* CONFIG_HAVE_KVM_IRQ_ROUTING */ -- cgit v1.2.3