# 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 # 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 # Signed-off-by: Michael Ellerman # Link: https://lore.kernel.org/r/a3d819d5c348cee9783a311d5d3f3ba9b48fd219.1608531452.git.christophe.leroy@csgroup.eu # < /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 d5c243989fb0cb03c74d7340daca3b819f706ee7 # < make -s -j 120 ARCH=powerpc O=/kisskb/build/powerpc-fixes_ppc6xx_defconfig_powerpc-gcc4.9 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-4.9.4-nolibc/powerpc64-linux/bin/powerpc64-linux- ppc6xx_defconfig # make -s -j 120 ARCH=powerpc O=/kisskb/build/powerpc-fixes_ppc6xx_defconfig_powerpc-gcc4.9 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-4.9.4-nolibc/powerpc64-linux/bin/powerpc64-linux- /kisskb/src/block/genhd.c: In function 'diskstats_show': /kisskb/src/block/genhd.c:1515:1: warning: the frame size of 1160 bytes is larger than 1024 bytes [-Wframe-larger-than=] } ^ INFO: Uncompressed kernel (size 0xc91f68) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xd00000) INFO: Uncompressed kernel (size 0xc91f68) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xd00000) INFO: Uncompressed kernel (size 0xc91f68) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xd00000) INFO: Uncompressed kernel (size 0xc91f68) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xd00000) INFO: Uncompressed kernel (size 0xc91f68) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xd00000) INFO: Uncompressed kernel (size 0xc91f68) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xd00000) INFO: Uncompressed kernel (size 0xc91f68) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xd00000) INFO: Uncompressed kernel (size 0xc91f68) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xd00000) INFO: Uncompressed kernel (size 0xc91f68) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xd00000) INFO: Uncompressed kernel (size 0xc81958) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xd00000) INFO: Uncompressed kernel (size 0xc91f68) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xd00000) INFO: Uncompressed kernel (size 0xc81958) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xd00000) Image Name: Linux-5.10.0+ Created: Tue Dec 22 01:13:24 2020 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 5470287 Bytes = 5342.08 KiB = 5.22 MiB Load Address: 00d00000 Entry Point: 00d00294 Image Name: Linux-5.10.0+ Created: Tue Dec 22 01:13:24 2020 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 5470332 Bytes = 5342.12 KiB = 5.22 MiB Load Address: 00d00000 Entry Point: 00d00294 Image Name: Linux-5.10.0+ Created: Tue Dec 22 01:13:24 2020 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 5469006 Bytes = 5340.83 KiB = 5.22 MiB Load Address: 00d00000 Entry Point: 00d00294 Image Name: Linux-5.10.0+ Created: Tue Dec 22 01:13:24 2020 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 5472263 Bytes = 5344.01 KiB = 5.22 MiB Load Address: 00d00000 Entry Point: 00d00894 Image Name: Linux-5.10.0+ Created: Tue Dec 22 01:13:24 2020 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 5470959 Bytes = 5342.73 KiB = 5.22 MiB Load Address: 00d00000 Entry Point: 00d00294 Image Name: Linux-5.10.0+ Created: Tue Dec 22 01:13:24 2020 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 5470923 Bytes = 5342.70 KiB = 5.22 MiB Load Address: 00d00000 Entry Point: 00d00294 Image Name: Linux-5.10.0+ Created: Tue Dec 22 01:13:24 2020 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 5468407 Bytes = 5340.24 KiB = 5.22 MiB Load Address: 00d00000 Entry Point: 00d00294 Image Name: Linux-5.10.0+ Created: Tue Dec 22 01:13:24 2020 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 5472073 Bytes = 5343.82 KiB = 5.22 MiB Load Address: 00d00000 Entry Point: 00d00894 Image Name: Linux-5.10.0+ Created: Tue Dec 22 01:13:24 2020 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 5438937 Bytes = 5311.46 KiB = 5.19 MiB Load Address: 00000000 Entry Point: 00000000 Completed OK # rm -rf /kisskb/build/powerpc-fixes_ppc6xx_defconfig_powerpc-gcc4.9 # Build took: 0:01:59.181401