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[88.74.206.207]) by smtp.gmail.com with ESMTPSA id a7-20020a17090682c700b009658475919csm3225039ejy.188.2023.05.22.09.13.16 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 22 May 2023 09:13:17 -0700 (PDT) From: Alexander Mikhalitsyn To: pbonzini@redhat.com Cc: Alexander Mikhalitsyn , Sean Christopherson , =?utf-8?q?St=C3=A9phane_Graber?= , kvm@vger.kernel.org, linux-kernel@vger.kernel.org, Thomas Gleixner , Ingo Molnar , Borislav Petkov , Dave Hansen , x86@kernel.org, "H. Peter Anvin" Subject: [PATCH v2 1/2] KVM: SVM: free sev_*asid_bitmap init if SEV init fails Date: Mon, 22 May 2023 18:12:47 +0200 Message-Id: <20230522161249.800829-2-aleksandr.mikhalitsyn@canonical.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230522161249.800829-1-aleksandr.mikhalitsyn@canonical.com> References: <20230522161249.800829-1-aleksandr.mikhalitsyn@canonical.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org If misc_cg_set_capacity() fails for some reason then we have a memleak for sev_reclaim_asid_bitmap/sev_asid_bitmap. It's not a case right now, because misc_cg_set_capacity() just can't fail and check inside it is always successful. But let's fix that for code consistency. Cc: Sean Christopherson Cc: Paolo Bonzini Cc: Stéphane Graber Cc: kvm@vger.kernel.org Cc: linux-kernel@vger.kernel.org Signed-off-by: Alexander Mikhalitsyn Reported-by: Alexander Mikhalitsyn Signed-off-by: Sean Christopherson --- arch/x86/kvm/svm/sev.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/arch/x86/kvm/svm/sev.c b/arch/x86/kvm/svm/sev.c index 69ae5e1b3120..cc832a8d1bca 100644 --- a/arch/x86/kvm/svm/sev.c +++ b/arch/x86/kvm/svm/sev.c @@ -2216,8 +2216,13 @@ void __init sev_hardware_setup(void) } sev_asid_count = max_sev_asid - min_sev_asid + 1; - if (misc_cg_set_capacity(MISC_CG_RES_SEV, sev_asid_count)) + if (misc_cg_set_capacity(MISC_CG_RES_SEV, sev_asid_count)) { + bitmap_free(sev_reclaim_asid_bitmap); + sev_reclaim_asid_bitmap = NULL; + bitmap_free(sev_asid_bitmap); + sev_asid_bitmap = NULL; goto out; + } pr_info("SEV supported: %u ASIDs\n", sev_asid_count); sev_supported = true;