# git rev-parse -q --verify 8659a0e0efdd975c73355dbc033f79ba3b31e82c^{commit} 8659a0e0efdd975c73355dbc033f79ba3b31e82c already have revision, skipping fetch # git checkout -q -f -B kisskb 8659a0e0efdd975c73355dbc033f79ba3b31e82c # git clean -qxdf # < git log -1 # commit 8659a0e0efdd975c73355dbc033f79ba3b31e82c # Author: Michael Ellerman # Date: Wed May 20 23:36:05 2020 +1000 # # powerpc/64s: Disable STRICT_KERNEL_RWX # # Several strange crashes have been eventually traced back to # STRICT_KERNEL_RWX and its interaction with code patching. # # Various paths in our ftrace, kprobes and other patching code need to # be hardened against patching failures, otherwise we can end up running # with partially/incorrectly patched ftrace paths, kprobes or jump # labels, which can then cause strange crashes. # # Although fixes for those are in development, they're not -rc material. # # There also seem to be problems with the underlying strict RWX logic, # which needs further debugging. # # So for now disable STRICT_KERNEL_RWX on 64-bit to prevent people from # enabling the option and tripping over the bugs. # # Fixes: 1e0fc9d1eb2b ("powerpc/Kconfig: Enable STRICT_KERNEL_RWX for some configs") # Cc: stable@vger.kernel.org # v4.13+ # Signed-off-by: Michael Ellerman # Link: https://lore.kernel.org/r/20200520133605.972649-1-mpe@ellerman.id.au # < /opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-gcc --version # < /opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-ld --version # < git log --format=%s --max-count=1 8659a0e0efdd975c73355dbc033f79ba3b31e82c # < make -s -j 24 ARCH=powerpc O=/kisskb/build/powerpc-fixes_ppc6xx_defconfig_powerpc-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux- ppc6xx_defconfig # < make -s -j 24 ARCH=powerpc O=/kisskb/build/powerpc-fixes_ppc6xx_defconfig_powerpc-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux- help # make -s -j 24 ARCH=powerpc O=/kisskb/build/powerpc-fixes_ppc6xx_defconfig_powerpc-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux- olddefconfig # make -s -j 24 ARCH=powerpc O=/kisskb/build/powerpc-fixes_ppc6xx_defconfig_powerpc-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux- /kisskb/src/kernel/trace/ftrace.c: In function 'pid_open': /kisskb/src/kernel/trace/ftrace.c:7166:6: warning: 'seq_ops' may be used uninitialized in this function [-Wmaybe-uninitialized] ret = seq_open(file, seq_ops); ^ /kisskb/src/kernel/trace/ftrace.c: In function 'pid_write': /kisskb/src/kernel/trace/ftrace.c:7244:6: warning: 'filtered_pids' may be used uninitialized in this function [-Wmaybe-uninitialized] ret = trace_pid_write(filtered_pids, &pid_list, ubuf, cnt); ^ /kisskb/src/kernel/trace/ftrace.c:7261:22: warning: 'other_pids' may be used uninitialized in this function [-Wmaybe-uninitialized] } else if (pid_list && !other_pids) { ^ In file included from /kisskb/src/sound/ppc/pmac.h:12:0, from /kisskb/src/sound/ppc/awacs.c:16: /kisskb/src/sound/ppc/awacs.c: In function 'snd_pmac_awacs_init': /kisskb/src/include/sound/control.h:218:9: warning: 'speaker_vol' may be used uninitialized in this function [-Wmaybe-uninitialized] return _snd_ctl_add_slave(master, slave, 0); ^ /kisskb/src/sound/ppc/awacs.c:873:36: note: 'speaker_vol' was declared here struct snd_kcontrol *master_vol, *speaker_vol; ^ INFO: Uncompressed kernel (size 0xad6908) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xb00000) INFO: Uncompressed kernel (size 0xad6908) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xb00000) INFO: Uncompressed kernel (size 0xad6908) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xb00000) INFO: Uncompressed kernel (size 0xad6908) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xb00000) INFO: Uncompressed kernel (size 0xad6908) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xb00000) INFO: Uncompressed kernel (size 0xad6908) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xb00000) INFO: Uncompressed kernel (size 0xad6908) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xb00000) INFO: Uncompressed kernel (size 0xad6908) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xb00000) INFO: Uncompressed kernel (size 0xad6908) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xb00000) INFO: Uncompressed kernel (size 0xad6908) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xb00000) INFO: Uncompressed kernel (size 0xac6220) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xb00000) INFO: Uncompressed kernel (size 0xac6220) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xb00000) Image Name: Linux-5.7.0-rc2+ Created: Fri May 22 10:58:20 2020 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 5202285 Bytes = 5080.36 KiB = 4.96 MiB Load Address: 00b00000 Entry Point: 00b00294 Image Name: Linux-5.7.0-rc2+ Created: Fri May 22 10:58:21 2020 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 5203140 Bytes = 5081.19 KiB = 4.96 MiB Load Address: 00b00000 Entry Point: 00b00894 Image Name: Linux-5.7.0-rc2+ Created: Fri May 22 10:58:21 2020 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 5202350 Bytes = 5080.42 KiB = 4.96 MiB Load Address: 00b00000 Entry Point: 00b00294 Image Name: Linux-5.7.0-rc2+ Created: Fri May 22 10:58:21 2020 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 5202229 Bytes = 5080.30 KiB = 4.96 MiB Load Address: 00b00000 Entry Point: 00b00294 Image Name: Linux-5.7.0-rc2+ Created: Fri May 22 10:58:21 2020 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 5202308 Bytes = 5080.38 KiB = 4.96 MiB Load Address: 00b00000 Entry Point: 00b00294 Image Name: Linux-5.7.0-rc2+ Created: Fri May 22 10:58:21 2020 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 5172029 Bytes = 5050.81 KiB = 4.93 MiB Load Address: 00000000 Entry Point: 00000000 Image Name: Linux-5.7.0-rc2+ Created: Fri May 22 10:58:21 2020 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 5201604 Bytes = 5079.69 KiB = 4.96 MiB Load Address: 00b00000 Entry Point: 00b00294 Image Name: Linux-5.7.0-rc2+ Created: Fri May 22 10:58:21 2020 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 5203040 Bytes = 5081.09 KiB = 4.96 MiB Load Address: 00b00000 Entry Point: 00b00894 Image Name: Linux-5.7.0-rc2+ Created: Fri May 22 10:58:22 2020 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 5201198 Bytes = 5079.29 KiB = 4.96 MiB Load Address: 00b00000 Entry Point: 00b00294 Completed OK # rm -rf /kisskb/build/powerpc-fixes_ppc6xx_defconfig_powerpc-gcc5 # Build took: 0:04:20.575293