Buildresult: powerpc-fixes/versatile_defconfig/arm-gcc4.9 built on Dec 22 2020, 00:59

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Status:	OK
Date/Time:	Dec 22 2020, 00:59
Duration:	0:00:29.981495
Builder:	ka4
Revision:	powerpc/32: Fix vmap stack - Properly set r1 before activating MMU on syscall too (`d5c243989fb0cb03c74d7340daca3b819f706ee7)`
Target:	powerpc-fixes/versatile_defconfig/arm-gcc4.9
Branch:	powerpc-fixes
Compiler:	arm-gcc4.9 (arm-linux-gnueabi-gcc (GCC) 4.9.4 / GNU ld (GNU Binutils) 2.29.1.20170915)
Config:	versatile_defconfig (download)
Log:	Download original No warnings found in log. Full Log # git rev-parse -q --verify d5c243989fb0cb03c74d7340daca3b819f706ee7^{commit} d5c243989fb0cb03c74d7340daca3b819f706ee7 already have revision, skipping fetch # git checkout -q -f -B kisskb d5c243989fb0cb03c74d7340daca3b819f706ee7 # git clean -qxdf # < git log -1 # commit d5c243989fb0cb03c74d7340daca3b819f706ee7 # Author: Christophe Leroy <christophe.leroy@csgroup.eu> # Date: Mon Dec 21 06:18:03 2020 +0000 # # powerpc/32: Fix vmap stack - Properly set r1 before activating MMU on syscall too # # We need r1 to be properly set before activating MMU, otherwise any new # exception taken while saving registers into the stack in syscall # prologs will use the user stack, which is wrong and will even lockup # or crash when KUAP is selected. # # Do that by switching the meaning of r11 and r1 until we have saved r1 # to the stack: copy r1 into r11 and setup the new stack pointer in r1. # To avoid complicating and impacting all generic and specific prolog # code (and more), copy back r1 into r11 once r11 is save onto # the stack. # # We could get rid of copying r1 back and forth at the cost of rewriting # everything to use r1 instead of r11 all the way when CONFIG_VMAP_STACK # is set, but the effort is probably not worth it for now. # # Fixes: da7bb43ab9da ("powerpc/32: Fix vmap stack - Properly set r1 before activating MMU") # Cc: stable@vger.kernel.org # v5.10+ # Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu> # Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> # Link: https://lore.kernel.org/r/a3d819d5c348cee9783a311d5d3f3ba9b48fd219.1608531452.git.christophe.leroy@csgroup.eu # < /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 d5c243989fb0cb03c74d7340daca3b819f706ee7 # < make -s -j 120 ARCH=arm O=/kisskb/build/powerpc-fixes_versatile_defconfig_arm-gcc4.9 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-4.9.4-nolibc/arm-linux-gnueabi/bin/arm-linux-gnueabi- versatile_defconfig # make -s -j 120 ARCH=arm O=/kisskb/build/powerpc-fixes_versatile_defconfig_arm-gcc4.9 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-4.9.4-nolibc/arm-linux-gnueabi/bin/arm-linux-gnueabi- Completed OK # rm -rf /kisskb/build/powerpc-fixes_versatile_defconfig_arm-gcc4.9 # Build took: 0:00:29.981495

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