Buildresult: linus/omap1_defconfig/arm-gcc4.9 built on Dec 9 2020, 17:29
kisskb
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Status:
OK
Date/Time:
Dec 9 2020, 17:29
Duration:
0:01:35.317147
Builder:
blade4b
Revision:
mm/madvise: remove racy mm ownership check (
a68a0262abdaa251e12c53715f48e698a18ef402)
Target:
linus/omap1_defconfig/arm-gcc4.9
Branch:
linus
Compiler:
arm-gcc4.9
(arm-linux-gnueabi-gcc (GCC) 4.9.4 / GNU ld (GNU Binutils) 2.29.1.20170915)
Config:
omap1_defconfig
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Log:
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Possible warnings (1)
arch/arm/mach-omap1/board-ams-delta.c:462:12: warning: 'ams_delta_camera_power' defined but not used [-Wunused-function]
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/arm-linux-gnueabi/bin/arm-linux-gnueabi-gcc --version # < /opt/cross/kisskb/korg/gcc-4.9.4-nolibc/arm-linux-gnueabi/bin/arm-linux-gnueabi-ld --version # < git log --format=%s --max-count=1 a68a0262abdaa251e12c53715f48e698a18ef402 # < make -s -j 24 ARCH=arm O=/kisskb/build/linus_omap1_defconfig_arm-gcc4.9 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-4.9.4-nolibc/arm-linux-gnueabi/bin/arm-linux-gnueabi- omap1_defconfig # < make -s -j 24 ARCH=arm O=/kisskb/build/linus_omap1_defconfig_arm-gcc4.9 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-4.9.4-nolibc/arm-linux-gnueabi/bin/arm-linux-gnueabi- help # make -s -j 24 ARCH=arm O=/kisskb/build/linus_omap1_defconfig_arm-gcc4.9 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-4.9.4-nolibc/arm-linux-gnueabi/bin/arm-linux-gnueabi- olddefconfig # make -s -j 24 ARCH=arm O=/kisskb/build/linus_omap1_defconfig_arm-gcc4.9 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-4.9.4-nolibc/arm-linux-gnueabi/bin/arm-linux-gnueabi- /kisskb/src/arch/arm/mach-omap1/board-ams-delta.c:462:12: warning: 'ams_delta_camera_power' defined but not used [-Wunused-function] static int ams_delta_camera_power(struct device *dev, int power) ^ Completed OK # rm -rf /kisskb/build/linus_omap1_defconfig_arm-gcc4.9 # Build took: 0:01:35.317147
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