Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 4da934dc authored Feb 16, 2017 by Vipin K Parashar Committed by Paul Mackerras Feb 17, 2017

KVM: PPC: Book3S PR: Ratelimit copy data failure error messages



kvm_ppc_mmu_book3s_32/64 xlat() logs "KVM can't copy data" error
upon failing to copy user data to kernel space. This floods kernel
log once such fails occur in short time period. Ratelimit this
error to avoid flooding kernel logs upon copy data failures.

Signed-off-by: Vipin K Parashar <vipin@linux.vnet.ibm.com>
Signed-off-by: Paul Mackerras <paulus@ozlabs.org>

parent 5b73d634

arch/powerpc/kvm/book3s_32_mmu.c

+2 −1

Original line number	Diff line number	Diff line
		@@ -224,7 +224,8 @@ static int kvmppc_mmu_book3s_32_xlate_pte(struct kvm_vcpu *vcpu, gva_t eaddr,
		ptem = kvmppc_mmu_book3s_32_get_ptem(sre, eaddr, primary);

		if(copy_from_user(pteg, (void __user *)ptegp, sizeof(pteg))) {
		printk(KERN_ERR "KVM: Can't copy data from 0x%lx!\n", ptegp);
		printk_ratelimited(KERN_ERR
		"KVM: Can't copy data from 0x%lx!\n", ptegp);
		goto no_page_found;
		}

arch/powerpc/kvm/book3s_64_mmu.c

+2 −1

Original line number	Diff line number	Diff line
		@@ -265,7 +265,8 @@ static int kvmppc_mmu_book3s_64_xlate(struct kvm_vcpu *vcpu, gva_t eaddr,
		goto no_page_found;

		if(copy_from_user(pteg, (void __user *)ptegp, sizeof(pteg))) {
		printk(KERN_ERR "KVM can't copy data from 0x%lx!\n", ptegp);
		printk_ratelimited(KERN_ERR
		"KVM: Can't copy data from 0x%lx!\n", ptegp);
		goto no_page_found;
		}