Buildresult: powerpc-fixes/powernv_defconfig+NO_RADIX/powerpc-gcc5 built on Jul 4 2018, 23:51

kisskb

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Status:	Failed
Date/Time:	Jul 4 2018, 23:51
Duration:	0:00:55.084676
Builder:	ka4
Revision:	KVM: PPC: Check if IOMMU page is contained in the pinned physical page (`d99d49613b7cd196ea161fc708040ea88adb6e18)`
Target:	powerpc-fixes/powernv_defconfig+NO_RADIX/powerpc-gcc5
Branch:	powerpc-fixes
Compiler:	powerpc-gcc5 (powerpc64le-linux-gcc (GCC) 5.2.0)
Config:	powernv_defconfig+NO_RADIX (download)
Log:	Download original Possible errors ERROR: "radix__flush_tlb_lpid_page" [arch/powerpc/kvm/kvm-hv.ko] undefined! ERROR: "radix__local_flush_tlb_lpid_guest" [arch/powerpc/kvm/kvm-hv.ko] undefined! ERROR: "radix__flush_pwc_lpid" [arch/powerpc/kvm/kvm-hv.ko] undefined! make[2]: * [__modpost] Error 1 make[1]: * [modules] Error 2 make: * [sub-make] Error 2 Possible warnings (1) WARNING: modpost: Found 2 section mismatch(es). Full Log # git rev-parse -q --verify d99d49613b7cd196ea161fc708040ea88adb6e18^{commit} d99d49613b7cd196ea161fc708040ea88adb6e18 already have revision, skipping fetch # git checkout -q -f -B kisskb d99d49613b7cd196ea161fc708040ea88adb6e18 # git clean -qxdf # < git log -1 # commit d99d49613b7cd196ea161fc708040ea88adb6e18 # Author: Alexey Kardashevskiy <aik@ozlabs.ru> # Date: Wed Jul 4 15:00:52 2018 +1000 # # KVM: PPC: Check if IOMMU page is contained in the pinned physical page # # A VM which has: # - a DMA capable device passed through to it (eg. network card); # - running a malicious kernel that ignores H_PUT_TCE failure; # - capability of using IOMMU pages bigger that physical pages # can create an IOMMU mapping that exposes (for example) 16MB of # the host physical memory to the device when only 64K was allocated to the VM. # # The remaining 16MB - 64K will be some other content of host memory, possibly # including pages of the VM, but also pages of host kernel memory, host # programs or other VMs. # # The attacking VM does not control the location of the page it can map, # and is only allowed to map as many pages as it has pages of RAM. # # We already have a check in drivers/vfio/vfio_iommu_spapr_tce.c that # an IOMMU page is contained in the physical page so the PCI hardware won't # get access to unassigned host memory; however this check is missing in # the KVM fastpath (H_PUT_TCE accelerated code). We were lucky so far and # did not hit this yet as the very first time when the mapping happens # we do not have tbl::it_userspace allocated yet and fall back to # the userspace which in turn calls VFIO IOMMU driver, this fails and # the guest does not retry, # # This stores the smallest preregistered page size in the preregistered # region descriptor and changes the mm_iommu_xxx API to check this against # the IOMMU page size. This only allows huge pages use if the entire # preregistered block is backed with huge pages which are completely # contained the preregistered chunk; otherwise this defaults to PAGE_SIZE. # # Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> # Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> # < /opt/cross/kisskb/gcc-5.2.0-nolibc/powerpc64le-linux/bin/powerpc64le-linux-gcc --version # < git log --format=%s --max-count=1 d99d49613b7cd196ea161fc708040ea88adb6e18 # < make -s -j 120 ARCH=powerpc O=/kisskb/build/powerpc-fixes_powernv_defconfig+NO_RADIX_ppc64le CROSS_COMPILE=/opt/cross/kisskb/gcc-5.2.0-nolibc/powerpc64le-linux/bin/powerpc64le-linux- powernv_defconfig # Added to kconfig CONFIG_PPC_RADIX_MMU=n # yes \n \| make -s -j 120 ARCH=powerpc O=/kisskb/build/powerpc-fixes_powernv_defconfig+NO_RADIX_ppc64le CROSS_COMPILE=/opt/cross/kisskb/gcc-5.2.0-nolibc/powerpc64le-linux/bin/powerpc64le-linux- oldconfig yes: standard output: Broken pipe yes: write error # make -s -j 120 ARCH=powerpc O=/kisskb/build/powerpc-fixes_powernv_defconfig+NO_RADIX_ppc64le CROSS_COMPILE=/opt/cross/kisskb/gcc-5.2.0-nolibc/powerpc64le-linux/bin/powerpc64le-linux- /kisskb/src/net/Makefile:24: CC cannot link executables. Skipping bpfilter. /kisskb/src/net/Makefile:24: CC cannot link executables. Skipping bpfilter. WARNING: modpost: Found 2 section mismatch(es). To see full details build your kernel with: 'make CONFIG_DEBUG_SECTION_MISMATCH=y' ERROR: "radix__flush_tlb_lpid_page" [arch/powerpc/kvm/kvm-hv.ko] undefined! ERROR: "radix__local_flush_tlb_lpid_guest" [arch/powerpc/kvm/kvm-hv.ko] undefined! ERROR: "radix__flush_pwc_lpid" [arch/powerpc/kvm/kvm-hv.ko] undefined! /kisskb/src/scripts/Makefile.modpost:92: recipe for target '__modpost' failed make[2]: * [__modpost] Error 1 /kisskb/src/Makefile:1211: recipe for target 'modules' failed make[1]: * [modules] Error 2 make[1]: * Waiting for unfinished jobs.... Makefile:146: recipe for target 'sub-make' failed make: *** [sub-make] Error 2 Command 'make -s -j 120 ARCH=powerpc O=/kisskb/build/powerpc-fixes_powernv_defconfig+NO_RADIX_ppc64le CROSS_COMPILE=/opt/cross/kisskb/gcc-5.2.0-nolibc/powerpc64le-linux/bin/powerpc64le-linux- ' returned non-zero exit status 2 # rm -rf /kisskb/build/powerpc-fixes_powernv_defconfig+NO_RADIX_ppc64le # Build took: 0:00:55.084676

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