Buildresult: powerpc-fixes/40x/kilauea_defconfig/powerpc-gcc5 built on Sep 19 2018, 00:19

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Status:	OK
Date/Time:	Sep 19 2018, 00:19
Duration:	0:00:36.700847
Builder:	ka2
Revision:	powerpc: Avoid code patching freed init sections (`51c3c62b58b357e8d35e4cc32f7b4ec907426fe3)`
Target:	powerpc-fixes/40x/kilauea_defconfig/powerpc-gcc5
Branch:	powerpc-fixes
Compiler:	powerpc-gcc5 (powerpc64-linux-gcc (GCC) 5.5.0)
Config:	40x/kilauea_defconfig (download)
Log:	Download original Possible warnings (1) arch/powerpc/kernel/head_40x.S:883: Warning: invalid register expression Full Log # git rev-parse -q --verify 51c3c62b58b357e8d35e4cc32f7b4ec907426fe3^{commit} 51c3c62b58b357e8d35e4cc32f7b4ec907426fe3 already have revision, skipping fetch # git checkout -q -f -B kisskb 51c3c62b58b357e8d35e4cc32f7b4ec907426fe3 # git clean -qxdf # < git log -1 # commit 51c3c62b58b357e8d35e4cc32f7b4ec907426fe3 # Author: Michael Neuling <mikey@neuling.org> # Date: Fri Sep 14 11:14:11 2018 +1000 # # powerpc: Avoid code patching freed init sections # # This stops us from doing code patching in init sections after they've # been freed. # # In this chain: # kvm_guest_init() -> # kvm_use_magic_page() -> # fault_in_pages_readable() -> # __get_user() -> # __get_user_nocheck() -> # barrier_nospec(); # # We have a code patching location at barrier_nospec() and # kvm_guest_init() is an init function. This whole chain gets inlined, # so when we free the init section (hence kvm_guest_init()), this code # goes away and hence should no longer be patched. # # We seen this as userspace memory corruption when using a memory # checker while doing partition migration testing on powervm (this # starts the code patching post migration via # /sys/kernel/mobility/migration). In theory, it could also happen when # using /sys/kernel/debug/powerpc/barrier_nospec. # # Cc: stable@vger.kernel.org # 4.13+ # Signed-off-by: Michael Neuling <mikey@neuling.org> # Reviewed-by: Nicholas Piggin <npiggin@gmail.com> # Reviewed-by: Christophe Leroy <christophe.leroy@c-s.fr> # Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> # < /opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-gcc --version # < git log --format=%s --max-count=1 51c3c62b58b357e8d35e4cc32f7b4ec907426fe3 # < make -s -j 48 ARCH=powerpc O=/kisskb/build/powerpc-fixes_40x_kilauea_defconfig_powerpc-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux- 40x/kilauea_defconfig # make -s -j 48 ARCH=powerpc O=/kisskb/build/powerpc-fixes_40x_kilauea_defconfig_powerpc-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux- /kisskb/src/arch/powerpc/kernel/head_40x.S: Assembler messages: /kisskb/src/arch/powerpc/kernel/head_40x.S:883: Warning: invalid register expression Completed OK # rm -rf /kisskb/build/powerpc-fixes_40x_kilauea_defconfig_powerpc-gcc5 # Build took: 0:00:36.700847

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