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SUSE:SLE-12-SP5:GA
xen.4216
585aa407-x86-HVM-NULL-check-before-using-VMFUNC...
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File 585aa407-x86-HVM-NULL-check-before-using-VMFUNC-hook.patch of Package xen.4216
# Commit 74dcd0ce6f4fadce8093e54f0fc1a45426577e13 # Date 2016-12-21 16:47:19 +0100 # Author Jan Beulich <jbeulich@suse.com> # Committer Jan Beulich <jbeulich@suse.com> x86/HVM: add missing NULL check before using VMFUNC hook This is CVE-2016-10025 / XSA-203. Signed-off-by: Jan Beulich <jbeulich@suse.com> Reviewed-by: Andrew Cooper <andrew.cooper3@citrix.com> --- a/xen/arch/x86/hvm/emulate.c +++ b/xen/arch/x86/hvm/emulate.c @@ -1643,6 +1643,8 @@ static int hvmemul_vmfunc( { int rc; + if ( !hvm_funcs.altp2m_vcpu_emulate_vmfunc ) + return X86EMUL_UNHANDLEABLE; rc = hvm_funcs.altp2m_vcpu_emulate_vmfunc(ctxt->regs); if ( rc != X86EMUL_OKAY ) hvmemul_inject_hw_exception(TRAP_invalid_op, HVM_DELIVER_NO_ERROR_CODE,
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