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[31.30.173.70]) by smtp.gmail.com with ESMTPSA id g15sm10892632edy.77.2022.01.26.23.51.22 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 26 Jan 2022 23:51:22 -0800 (PST) Date: Thu, 27 Jan 2022 08:51:20 +0100 From: Andrew Jones To: Ricardo Koller Cc: kvm@vger.kernel.org, kvmarm@lists.cs.columbia.edu, maz@kernel.org, Paolo Bonzini , oupton@google.com, reijiw@google.com Subject: Re: [PATCH v2 5/5] kvm: selftests: aarch64: use a tighter assert in vgic_poke_irq() Message-ID: <20220127075120.5ntwadlgf2ncd2ua@gator> References: <20220127030858.3269036-1-ricarkol@google.com> <20220127030858.3269036-6-ricarkol@google.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20220127030858.3269036-6-ricarkol@google.com> Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org On Wed, Jan 26, 2022 at 07:08:58PM -0800, Ricardo Koller wrote: > vgic_poke_irq() checks that the attr argument passed to the vgic device > ioctl is sane. Make this check tighter by moving it to after the last > attr update. > > Signed-off-by: Ricardo Koller > Reported-by: Reiji Watanabe > Cc: Andrew Jones > --- > tools/testing/selftests/kvm/lib/aarch64/vgic.c | 6 +++--- > 1 file changed, 3 insertions(+), 3 deletions(-) > > diff --git a/tools/testing/selftests/kvm/lib/aarch64/vgic.c b/tools/testing/selftests/kvm/lib/aarch64/vgic.c > index 79864b941617..f365c32a7296 100644 > --- a/tools/testing/selftests/kvm/lib/aarch64/vgic.c > +++ b/tools/testing/selftests/kvm/lib/aarch64/vgic.c > @@ -138,9 +138,6 @@ static void vgic_poke_irq(int gic_fd, uint32_t intid, > uint64_t val; > bool intid_is_private = INTID_IS_SGI(intid) || INTID_IS_PPI(intid); > > - /* Check that the addr part of the attr is within 32 bits. */ > - assert(attr <= KVM_DEV_ARM_VGIC_OFFSET_MASK); > - > uint32_t group = intid_is_private ? KVM_DEV_ARM_VGIC_GRP_REDIST_REGS > : KVM_DEV_ARM_VGIC_GRP_DIST_REGS; > > @@ -150,6 +147,9 @@ static void vgic_poke_irq(int gic_fd, uint32_t intid, > attr += SZ_64K; > } > > + /* Check that the addr part of the attr is within 32 bits. */ > + assert((attr & ~KVM_DEV_ARM_VGIC_OFFSET_MASK) == 0); > + > /* > * All calls will succeed, even with invalid intid's, as long as the > * addr part of the attr is within 32 bits (checked above). An invalid > -- > 2.35.0.rc0.227.g00780c9af4-goog > Reviewed-by: Andrew Jones