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[2001:8b0:1d0::2]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-429ded19627sm48269935e9.5.2024.08.15.06.12.07 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 15 Aug 2024 06:12:07 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; t=1723727528; x=1724332328; darn=nongnu.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=fLB7mJfkqSlFxiYgEnzw0Isby/ZPn7qIXDefx+aMhHg=; b=La885RhCR/dPLyR19c6+fw05pSwC+LuEJBqaietJTAd+8BALawektZCrnh+oi9rQrk LrIElFRJlnxHAt2rMMivaSgyGlNE+6IxP2zqOkdqLbjzO3vVIOj8uZr4ANLBYXif5jf5 rl1p3NFals6fVOnEjZS3H1kfWcqjwljTsyzP+APz0M8Q942SgslkYiFZvRT21jXU0orM Q+5p/cQmh92FIeHrtGLpGywzJeFJhpf6OXatPkqd41JhY86tLpnwkvsK1xtTrBoFytl0 2LL77uYLjGfSk+iatkTxWiNNNlvn0wnjgPFpYls7a8pp2IO5iwIC1dJ9qFrcNJebGydb hesQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1723727528; x=1724332328; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=fLB7mJfkqSlFxiYgEnzw0Isby/ZPn7qIXDefx+aMhHg=; b=ZgE1vLpiOQOkN/TLORqs5vALZokH9qkiy58jiNFsLXusdgLjP4ln1IP/bni7G4FPhf ncu2CbhO+KrThfu4uDmUDpnuw5YyZzy0zyZujtEBfgIn4jQg0xkpx41sRKbIWK+WGK2B UfZSiWhnRKC5jLQ4B20zMf6ljNiAtY9yrTvCXuZGAuw2YGt9vTOSuKQ0JgHii4zisIIC hQAMnkSIQJhGKSrNDpGF16PupvTLIxxiJ+9ShiLl+HCfxP5uf7EmROskf4ShxfTkd8Qe Ptv1uEx66M8ovVyIcAnK7RB4/jzIhcQCWXZgeOmK8vd2baaTPCT1wE25rcFE+MaKkLyF ZalA== X-Gm-Message-State: AOJu0YwbRMKDSUoHitQ5B4ogo1c0bTGkuvU0zf0NpE0KKF0z3YbrnC5J 8hVm8DWKxqOc3JKrCwePvBN9K505ZqXY/R08muNtUwUrh8aDc+mwT+aAdj2mq3z4O/tpXF4HqUs 1 X-Google-Smtp-Source: AGHT+IHiva5yut0dbIZZj7522nyyeyZkCoYlPKhnvW3NyU6er4vgmQ92hGcpY2H+O73mEPOr8NwHiw== X-Received: by 2002:a05:651c:544:b0:2ef:392e:e45 with SMTP id 38308e7fff4ca-2f3aa1f923dmr47729241fa.33.1723727527871; Thu, 15 Aug 2024 06:12:07 -0700 (PDT) From: Peter Maydell To: qemu-devel@nongnu.org Cc: Paolo Bonzini Subject: [PATCH for-9.2 1/2] kvm: Make 'mmap_size' be 'int' in kvm_init_vcpu(), do_kvm_destroy_vcpu() Date: Thu, 15 Aug 2024 14:12:05 +0100 Message-Id: <20240815131206.3231819-2-peter.maydell@linaro.org> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20240815131206.3231819-1-peter.maydell@linaro.org> References: <20240815131206.3231819-1-peter.maydell@linaro.org> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=2a00:1450:4864:20::22c; envelope-from=peter.maydell@linaro.org; helo=mail-lj1-x22c.google.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @linaro.org) X-ZM-MESSAGEID: 1723727611114116600 Content-Type: text/plain; charset="utf-8" In kvm_init_vcpu()and do_kvm_destroy_vcpu(), the return value from kvm_ioctl(..., KVM_GET_VCPU_MMAP_SIZE, ...) is an 'int', but we put it into a 'long' logal variable mmap_size. Coverity then complains that there might be a truncation when we copy that value into the 'int ret' which we use for returning a value in an error-exit codepath. This can't ever actually overflow because the value was in an 'int' to start with, but it makes more sense to use 'int' for mmap_size so we don't do the widen-then-narrow sequence in the first place. Resolves: Coverity CID 1547515 Signed-off-by: Peter Maydell Reviewed-by: Philippe Mathieu-Daud=C3=A9 --- Borderline whether this was worth changing, but I came down on the side of "yes". --- accel/kvm/kvm-all.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/accel/kvm/kvm-all.c b/accel/kvm/kvm-all.c index beb1988d12c..6c4cb263ba3 100644 --- a/accel/kvm/kvm-all.c +++ b/accel/kvm/kvm-all.c @@ -414,7 +414,7 @@ int kvm_create_and_park_vcpu(CPUState *cpu) static int do_kvm_destroy_vcpu(CPUState *cpu) { KVMState *s =3D kvm_state; - long mmap_size; + int mmap_size; int ret =3D 0; =20 trace_kvm_destroy_vcpu(cpu->cpu_index, kvm_arch_vcpu_id(cpu)); @@ -459,7 +459,7 @@ void kvm_destroy_vcpu(CPUState *cpu) int kvm_init_vcpu(CPUState *cpu, Error **errp) { KVMState *s =3D kvm_state; - long mmap_size; + int mmap_size; int ret; =20 trace_kvm_init_vcpu(cpu->cpu_index, kvm_arch_vcpu_id(cpu)); --=20 2.34.1