Buildresult: linus/pmac32_defconfig+SMP/powerpc-gcc4.9 built on Dec 9 2020, 17:43

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Status:	Failed
Date/Time:	Dec 9 2020, 17:43
Duration:	0:01:00.185358
Builder:	ka2
Revision:	mm/madvise: remove racy mm ownership check (`a68a0262abdaa251e12c53715f48e698a18ef402)`
Target:	linus/pmac32_defconfig+SMP/powerpc-gcc4.9
Branch:	linus
Compiler:	powerpc-gcc4.9 (powerpc64-linux-gcc (GCC) 4.9.4 / GNU ld (GNU Binutils) 2.29.1.20170915)
Config:	pmac32_defconfig+SMP (download)
Log:	Download original Possible errors arch/powerpc/platforms/powermac/smp.c:914:2: error: implicit declaration of function 'cleanup_cpu_mmu_context' [-Werror=implicit-function-declaration] cc1: all warnings being treated as errors make[4]: * [scripts/Makefile.build:279: arch/powerpc/platforms/powermac/smp.o] Error 1 make[3]: * [scripts/Makefile.build:496: arch/powerpc/platforms/powermac] Error 2 make[2]: * [scripts/Makefile.build:496: arch/powerpc/platforms] Error 2 make[1]: * [Makefile:1805: arch/powerpc] Error 2 make: *** [Makefile:185: __sub-make] Error 2 Possible warnings (1) .config:4119:warning: override: reassigning to symbol SMP Full Log # git rev-parse -q --verify a68a0262abdaa251e12c53715f48e698a18ef402^{commit} a68a0262abdaa251e12c53715f48e698a18ef402 already have revision, skipping fetch # git checkout -q -f -B kisskb a68a0262abdaa251e12c53715f48e698a18ef402 # git clean -qxdf # < git log -1 # commit a68a0262abdaa251e12c53715f48e698a18ef402 # Author: Minchan Kim <minchan@kernel.org> # Date: Tue Dec 8 20:57:18 2020 -0800 # # mm/madvise: remove racy mm ownership check # # Jann spotted the security hole due to race of mm ownership check. # # If the task is sharing the mm_struct but goes through execve() before # mm_access(), it could skip process_madvise_behavior_valid check. That # makes any advice hint to reach into the remote process. # # This patch removes the mm ownership check. With it, it will lose the # ability that local process could give any advice hint with vector # interface for some reason (e.g., performance). Since there is no # concrete example in upstream yet, it would be better to remove the # abiliity at this moment and need to review when such new advice comes # up. # # Fixes: ecb8ac8b1f14 ("mm/madvise: introduce process_madvise() syscall: an external memory hinting API") # Reported-by: Jann Horn <jannh@google.com> # Suggested-by: Jann Horn <jannh@google.com> # Signed-off-by: Minchan Kim <minchan@kernel.org> # Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> # < /opt/cross/kisskb/korg/gcc-4.9.4-nolibc/powerpc64-linux/bin/powerpc64-linux-gcc --version # < /opt/cross/kisskb/korg/gcc-4.9.4-nolibc/powerpc64-linux/bin/powerpc64-linux-ld --version # < git log --format=%s --max-count=1 a68a0262abdaa251e12c53715f48e698a18ef402 # < make -s -j 8 ARCH=powerpc O=/kisskb/build/linus_pmac32_defconfig+SMP_powerpc-gcc4.9 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-4.9.4-nolibc/powerpc64-linux/bin/powerpc64-linux- pmac32_defconfig # Added to kconfig CONFIG_SMP=y # < make -s -j 8 ARCH=powerpc O=/kisskb/build/linus_pmac32_defconfig+SMP_powerpc-gcc4.9 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-4.9.4-nolibc/powerpc64-linux/bin/powerpc64-linux- help # make -s -j 8 ARCH=powerpc O=/kisskb/build/linus_pmac32_defconfig+SMP_powerpc-gcc4.9 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-4.9.4-nolibc/powerpc64-linux/bin/powerpc64-linux- olddefconfig .config:4119:warning: override: reassigning to symbol SMP # make -s -j 8 ARCH=powerpc O=/kisskb/build/linus_pmac32_defconfig+SMP_powerpc-gcc4.9 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-4.9.4-nolibc/powerpc64-linux/bin/powerpc64-linux- /kisskb/src/arch/powerpc/platforms/powermac/smp.c: In function 'smp_core99_cpu_disable': /kisskb/src/arch/powerpc/platforms/powermac/smp.c:914:2: error: implicit declaration of function 'cleanup_cpu_mmu_context' [-Werror=implicit-function-declaration] cleanup_cpu_mmu_context(); ^ cc1: all warnings being treated as errors make[4]: * [/kisskb/src/scripts/Makefile.build:279: arch/powerpc/platforms/powermac/smp.o] Error 1 make[3]: * [/kisskb/src/scripts/Makefile.build:496: arch/powerpc/platforms/powermac] Error 2 make[2]: * [/kisskb/src/scripts/Makefile.build:496: arch/powerpc/platforms] Error 2 make[2]: * Waiting for unfinished jobs.... make[1]: * [/kisskb/src/Makefile:1805: arch/powerpc] Error 2 make[1]: * Waiting for unfinished jobs.... make: *** [Makefile:185: __sub-make] Error 2 Command 'make -s -j 8 ARCH=powerpc O=/kisskb/build/linus_pmac32_defconfig+SMP_powerpc-gcc4.9 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-4.9.4-nolibc/powerpc64-linux/bin/powerpc64-linux- ' returned non-zero exit status 2 # rm -rf /kisskb/build/linus_pmac32_defconfig+SMP_powerpc-gcc4.9 # Build took: 0:01:00.185358

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