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[192.75.244.1]) by smtp.gmail.com with ESMTPSA id 98e67ed59e1d1-3adcb0a28f3sm964360a91.3.2026.10.22.17.37.09 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 22 Oct 2026 17:37:09 -0700 (PDT) From: ma.mandourr@gmail.com To: Sean Christopherson , Paolo Bonzini Cc: kvm@vger.kernel.org, linux-kernel@vger.kernel.org, ma.mandourr@gmail.com Subject: [PATCH v2 0/3] KVM: nVMX: Don't clobber VM-Entry instruction length on soft INTn exits Date: Thu, 22 Oct 2026 17:37:00 -0700 Message-ID: <20261023003703.450577-1-ma.mandourr@gmail.com> X-Mailer: git-send-email 2.43.0 X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Transfer-Encoding: 8bit From: Mahmoud Abumandour KVM writes the length of a soft INTn that L2 was vectoring at the time of a nested VM-Exit into vmcs12's VM-Entrty instruction length instead of the VM-Exit instruction length. Patch 1 did not exist in v1, but Sashiko pointed out that prepare_vmcs12() overwrites the VM-exit instruction length that vmcs12_save_pending_event() saves for soft events. The selftest patch was written with the help of an LLM (Claude Opus 5.5). v2: - New Patch 1 - Same Patch 2 from v1 (with commit message changes) - Patch 3 now extends nested_exceptions_test instead of adding a new test (suggested by Sashiko). v1: https://lore.kernel.org/all/20261021042603.608292-1-ma.mandourr@gmail.com Mahmoud Abumandour (3): KVM: nVMX: Fill VM-Exit instruction length before saving pending event KVM: nVMX: Don't clobber VM-Entry instruction length when saving soft INTn KVM: selftests: Verify nested VM-Exits while vectoring INT3 and INTn arch/x86/kvm/vmx/nested.c | 6 ++- .../kvm/x86/nested_exceptions_test.c | 39 +++++++++++++++++++ 2 files changed, 43 insertions(+), 2 deletions(-) -- 2.43.0