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[34.168.104.7]) by smtp.gmail.com with ESMTPSA id b30-20020aa78ede000000b00540d03f522fsm205433pfr.66.2022.09.08.08.20.08 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 08 Sep 2022 08:20:08 -0700 (PDT) Date: Thu, 8 Sep 2022 15:20:04 +0000 From: Sean Christopherson To: Vipin Sharma Cc: pbonzini@redhat.com, jmattson@google.com, kvm@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH] KVM: x86: Fix mce_banks memory leak on mci_ctl2_banks allocation failure Message-ID: References: <20220819182258.588335-1-vipinsh@google.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: X-Spam-Status: No, score=-17.6 required=5.0 tests=BAYES_00,DKIMWL_WL_MED, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF, ENV_AND_HDR_SPF_MATCH,RCVD_IN_DNSWL_NONE,SPF_HELO_NONE,SPF_PASS, T_SCC_BODY_TEXT_LINE,USER_IN_DEF_DKIM_WL,USER_IN_DEF_SPF_WL autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Aug 30, 2022, Sean Christopherson wrote: > On Fri, Aug 19, 2022, Vipin Sharma wrote: > > If mci_ctl2_banks allocation fails, kvm goes to fail_free_pio_data and > > forgets about freeing mce_banks memory causing memory leak. > > > > Individually check memory allocation status and free memory in the correct > > order. > > > > Fixes: 281b52780b57 ("KVM: x86: Add emulation for MSR_IA32_MCx_CTL2 MSRs.") > > Signed-off-by: Vipin Sharma > > --- > > Pushed to branch `for_paolo/6.1` at: > > https://github.com/sean-jc/linux.git > > Unless you hear otherwise, it will make its way to kvm/queue "soon". Doh. Dropping this as Paolo already sent a different fix[*] to Linus, commit 3c0ba05ce9c9 ("KVM: x86: fix memoryleak in kvm_arch_vcpu_create()"). Sorry :-( [*] https://lore.kernel.org/all/20220901122300.22298-1-linmiaohe@huawei.com