lists.openwall.net   lists  /  announce  owl-users  owl-dev  john-users  john-dev  passwdqc-users  yescrypt  popa3d-users  /  oss-security  kernel-hardening  musl  sabotage  tlsify  passwords  /  crypt-dev  xvendor  /  Bugtraq  Full-Disclosure  linux-kernel  linux-netdev  linux-ext4  linux-hardening  linux-cve-announce  PHC 
Open Source and information security mailing list archives
 
Hash Suite: Windows password security audit tool. GUI, reports in PDF.
[<prev] [next>] [thread-next>] [day] [month] [year] [list]
Message-Id: <50A8F108-8055-4115-B4EB-706D97736E65@ubuntu.com>
Date:	Mon, 20 Feb 2012 23:30:11 -0500
From:	Ben Collins <bcollins@...ntu.com>
To:	Alexander Graf <agraf@...e.de>
Cc:	kvm-ppc@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH] KVM: PPC: check error return of kvmppc_core_vcpu_create first

The result of kvmppc_core_vcpu_create() was being manipulated before it was checked for IS_ERR(). Did not see the bug occur, but caught it when looking through the code.

Signed-off-by: Ben Collins <bcollins@...ntu.com>

diff --git a/arch/powerpc/kvm/powerpc.c b/arch/powerpc/kvm/powerpc.c
index 607fbdf..8877614 100644
--- a/arch/powerpc/kvm/powerpc.c
+++ b/arch/powerpc/kvm/powerpc.c
@@ -278,10 +278,14 @@ void kvm_arch_flush_shadow(struct kvm *kvm)
 struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, unsigned int id)
 {
 	struct kvm_vcpu *vcpu;
+
 	vcpu = kvmppc_core_vcpu_create(kvm, id);
+	if (IS_ERR(vcpu))
+		return vcpu;
+
 	vcpu->arch.wqp = &vcpu->wq;
-	if (!IS_ERR(vcpu))
-		kvmppc_create_vcpu_debugfs(vcpu, id);
+	kvmppc_create_vcpu_debugfs(vcpu, id);
+
 	return vcpu;
 }
 

--
Bluecherry: http://www.bluecherrydvr.com/
SwissDisk : http://www.swissdisk.com/
Ubuntu    : http://www.ubuntu.com/
My Blog   : http://ben-collins.blogspot.com/

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/

Powered by blists - more mailing lists

Powered by Openwall GNU/*/Linux Powered by OpenVZ