2017-12-14 19:52 GMT+08:00 kbuild test robot <fengguang.wu@xxxxxxxxx>: > tree: https://git.kernel.org/pub/scm/virt/kvm/kvm.git queue > head: 9943a6eb21d255cf7c166881c6cdcc7d4c0c6dda > commit: ead301b2c67a80b44d8a9968918421f215d8803d [63/66] KVM: X86: Fix stack-out-of-bounds read in write_mmio > reproduce: > # apt-get install sparse > git checkout ead301b2c67a80b44d8a9968918421f215d8803d > make ARCH=x86_64 allmodconfig > make C=1 CF=-D__CHECK_ENDIAN__ > > > sparse warnings: (new ones prefixed by >>) Thanks for the report, I will fix it. Regards, Wanpeng Li > > > vim +4748 arch/x86/kvm/x86.c > > 77d197b2 Xiao Guangrong 2011-07-13 4744 > 77d197b2 Xiao Guangrong 2011-07-13 4745 static int read_exit_mmio(struct kvm_vcpu *vcpu, gpa_t gpa, > 77d197b2 Xiao Guangrong 2011-07-13 4746 void *val, int bytes) > 77d197b2 Xiao Guangrong 2011-07-13 4747 { > 77d197b2 Xiao Guangrong 2011-07-13 @4748 trace_kvm_mmio(KVM_TRACE_MMIO_READ_UNSATISFIED, bytes, gpa, 0); > 77d197b2 Xiao Guangrong 2011-07-13 4749 return X86EMUL_IO_NEEDED; > 77d197b2 Xiao Guangrong 2011-07-13 4750 } > 77d197b2 Xiao Guangrong 2011-07-13 4751 > > :::::: The code at line 4748 was first introduced by commit > :::::: 77d197b2ca37b33b0461ab1e2dbe40cbe4a6fd6a KVM: x86: abstract the operation for read/write emulation > > :::::: TO: Xiao Guangrong <xiaoguangrong@xxxxxxxxxxxxxx> > :::::: CC: Avi Kivity <avi@xxxxxxxxxx> > > --- > 0-DAY kernel test infrastructure Open Source Technology Center > https://lists.01.org/pipermail/kbuild-all Intel Corporation
