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[34.168.104.7]) by smtp.gmail.com with ESMTPSA id i63-20020a636d42000000b0041c0c9c0072sm1993019pgc.64.2022.08.30.14.45.54 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 30 Aug 2022 14:45:54 -0700 (PDT) Date: Tue, 30 Aug 2022 21:45:51 +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: <20220819182258.588335-1-vipinsh@google.com> X-Spam-Status: No, score=-14.9 required=5.0 tests=BAYES_00,DKIMWL_WL_MED, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF, ENV_AND_HDR_SPF_MATCH,FSL_HELO_FAKE,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=no 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 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". Note, the commit IDs are not guaranteed to be stable.