| From | Luis Henriques <> | Subject | [PATCH 3.16.y-ckt 062/126] MIPS: KVM: Uninit VCPU in vcpu_create error path | Date | Wed, 6 Jan 2016 10:36:31 +0000 |
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3.16.7-ckt22 -stable review patch. If anyone has any objections, please let me know.
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From: James Hogan <james.hogan@imgtec.com>
commit 585bb8f9a5e592f2ce7abbe5ed3112d5438d2754 upstream.
If either of the memory allocations in kvm_arch_vcpu_create() fail, the vcpu which has been allocated and kvm_vcpu_init'd doesn't get uninit'd in the error handling path. Add a call to kvm_vcpu_uninit() to fix this.
Fixes: 669e846e6c4e ("KVM/MIPS32: MIPS arch specific APIs for KVM") Signed-off-by: James Hogan <james.hogan@imgtec.com> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: Paolo Bonzini <pbonzini@redhat.com> Cc: Gleb Natapov <gleb@kernel.org> Cc: linux-mips@linux-mips.org Cc: kvm@vger.kernel.org Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> [ luis: backported to 3.16: - file rename: mips.c -> kvm_mips.c ] Signed-off-by: Luis Henriques <luis.henriques@canonical.com> --- arch/mips/kvm/kvm_mips.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/arch/mips/kvm/kvm_mips.c b/arch/mips/kvm/kvm_mips.c index cc721a3c8996..2c81c2c9e8dc 100644 --- a/arch/mips/kvm/kvm_mips.c +++ b/arch/mips/kvm/kvm_mips.c @@ -307,7 +307,7 @@ struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, unsigned int id) if (!gebase) { err = -ENOMEM; - goto out_free_cpu; + goto out_uninit_cpu; } kvm_debug("Allocated %d bytes for KVM Exception Handlers @ %p\n", ALIGN(size, PAGE_SIZE), gebase); @@ -368,6 +368,9 @@ struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, unsigned int id) out_free_gebase: kfree(gebase); +out_uninit_cpu: + kvm_vcpu_uninit(vcpu); + out_free_cpu: kfree(vcpu);
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