# 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-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 8659a0e0efdd975c73355dbc033f79ba3b31e82c # < make -s -j 24 ARCH=powerpc O=/kisskb/build/powerpc-fixes_mpc85xx_defconfig_powerpc-gcc4.9 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-4.9.4-nolibc/powerpc64-linux/bin/powerpc64-linux- mpc85xx_defconfig # < make -s -j 24 ARCH=powerpc O=/kisskb/build/powerpc-fixes_mpc85xx_defconfig_powerpc-gcc4.9 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-4.9.4-nolibc/powerpc64-linux/bin/powerpc64-linux- help # make -s -j 24 ARCH=powerpc O=/kisskb/build/powerpc-fixes_mpc85xx_defconfig_powerpc-gcc4.9 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-4.9.4-nolibc/powerpc64-linux/bin/powerpc64-linux- olddefconfig # make -s -j 24 ARCH=powerpc O=/kisskb/build/powerpc-fixes_mpc85xx_defconfig_powerpc-gcc4.9 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-4.9.4-nolibc/powerpc64-linux/bin/powerpc64-linux- /kisskb/src/kernel/futex.c: In function 'do_futex': /kisskb/src/kernel/futex.c:1676:17: warning: 'oldval' may be used uninitialized in this function [-Wmaybe-uninitialized] return oldval == cmparg; ^ /kisskb/src/kernel/futex.c:1652:6: note: 'oldval' was declared here int oldval, ret; ^ In file included from /kisskb/src/include/linux/kernel.h:11:0, from /kisskb/src/include/linux/list.h:9, from /kisskb/src/include/linux/module.h:12, from /kisskb/src/drivers/net/ethernet/freescale/fs_enet/mac-scc.c:15: /kisskb/src/drivers/net/ethernet/freescale/fs_enet/mac-scc.c: In function 'allocate_bd': /kisskb/src/include/linux/err.h:22:49: warning: cast to pointer from integer of different size [-Wint-to-pointer-cast] #define IS_ERR_VALUE(x) unlikely((unsigned long)(void *)(x) >= (unsigned long)-MAX_ERRNO) ^ /kisskb/src/include/linux/compiler.h:78:42: note: in definition of macro 'unlikely' # define unlikely(x) __builtin_expect(!!(x), 0) ^ /kisskb/src/drivers/net/ethernet/freescale/fs_enet/mac-scc.c:139:6: note: in expansion of macro 'IS_ERR_VALUE' if (IS_ERR_VALUE(fep->ring_mem_addr)) ^ /kisskb/src/arch/powerpc/boot/dts/fsl/mpc8541cds.dts:330.3-21: Warning (pci_device_bus_num): /pci@e0008000/i8259@19000:bus-range: PCI bus number 1 out of range, expected (0 - 0) /kisskb/src/arch/powerpc/boot/dts/fsl/mpc8555cds.dts:330.3-21: Warning (pci_device_bus_num): /pci@e0008000/i8259@19000:bus-range: PCI bus number 1 out of range, expected (0 - 0) INFO: Uncompressed kernel (size 0xcae724) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xd00000) INFO: Uncompressed kernel (size 0xcae724) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xd00000) INFO: Uncompressed kernel (size 0xcae724) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xd00000) INFO: Uncompressed kernel (size 0xcae724) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xd00000) INFO: Uncompressed kernel (size 0xcae724) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xd00000) INFO: Uncompressed kernel (size 0xcae724) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xd00000) INFO: Uncompressed kernel (size 0xcae724) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xd00000) INFO: Uncompressed kernel (size 0xcae724) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xd00000) INFO: Uncompressed kernel (size 0xcae724) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xd00000) INFO: Uncompressed kernel (size 0xcae724) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xd00000) INFO: Uncompressed kernel (size 0xcae724) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xd00000) INFO: Uncompressed kernel (size 0xcae724) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xd00000) INFO: Uncompressed kernel (size 0xcae724) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xd00000) INFO: Uncompressed kernel (size 0xcae724) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xd00000) INFO: Uncompressed kernel (size 0xcae724) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xd00000) INFO: Uncompressed kernel (size 0xc9df20) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xd00000) Image Name: Linux-5.7.0-rc2-g8659a0e0efdd Created: Fri May 22 14:29:21 2020 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 6235866 Bytes = 6089.71 KiB = 5.95 MiB Load Address: 00d00000 Entry Point: 00d002a4 Image Name: Linux-5.7.0-rc2-g8659a0e0efdd Created: Fri May 22 14:29:21 2020 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 6235274 Bytes = 6089.13 KiB = 5.95 MiB Load Address: 00d00000 Entry Point: 00d002a4 Image Name: Linux-5.7.0-rc2-g8659a0e0efdd Created: Fri May 22 14:29:21 2020 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 6234885 Bytes = 6088.75 KiB = 5.95 MiB Load Address: 00d00000 Entry Point: 00d002a4 Image Name: Linux-5.7.0-rc2-g8659a0e0efdd Created: Fri May 22 14:29:21 2020 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 6234212 Bytes = 6088.10 KiB = 5.95 MiB Load Address: 00d00000 Entry Point: 00d002a4 Image Name: Linux-5.7.0-rc2-g8659a0e0efdd Created: Fri May 22 14:29:21 2020 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 6235719 Bytes = 6089.57 KiB = 5.95 MiB Load Address: 00d00000 Entry Point: 00d00314 Image Name: Linux-5.7.0-rc2-g8659a0e0efdd Created: Fri May 22 14:29:21 2020 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 6236162 Bytes = 6090.00 KiB = 5.95 MiB Load Address: 00d00000 Entry Point: 00d002a4 Image Name: Linux-5.7.0-rc2-g8659a0e0efdd Created: Fri May 22 14:29:21 2020 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 6235091 Bytes = 6088.96 KiB = 5.95 MiB Load Address: 00d00000 Entry Point: 00d00314 Image Name: Linux-5.7.0-rc2-g8659a0e0efdd Created: Fri May 22 14:29:21 2020 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 6235375 Bytes = 6089.23 KiB = 5.95 MiB Load Address: 00d00000 Entry Point: 00d00314 Image Name: Linux-5.7.0-rc2-g8659a0e0efdd Created: Fri May 22 14:29:22 2020 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 6235363 Bytes = 6089.22 KiB = 5.95 MiB Load Address: 00d00000 Entry Point: 00d002a4 Image Name: Linux-5.7.0-rc2-g8659a0e0efdd Created: Fri May 22 14:29:22 2020 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 6235403 Bytes = 6089.26 KiB = 5.95 MiB Load Address: 00d00000 Entry Point: 00d00314 Image Name: Linux-5.7.0-rc2-g8659a0e0efdd Created: Fri May 22 14:29:22 2020 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 6235737 Bytes = 6089.59 KiB = 5.95 MiB Load Address: 00d00000 Entry Point: 00d002a4 Image Name: Linux-5.7.0-rc2-g8659a0e0efdd Created: Fri May 22 14:29:22 2020 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 6235038 Bytes = 6088.90 KiB = 5.95 MiB Load Address: 00d00000 Entry Point: 00d002a4 Image Name: Linux-5.7.0-rc2-g8659a0e0efdd Created: Fri May 22 14:29:22 2020 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 6235721 Bytes = 6089.57 KiB = 5.95 MiB Load Address: 00d00000 Entry Point: 00d00314 Image Name: Linux-5.7.0-rc2-g8659a0e0efdd Created: Fri May 22 14:29:22 2020 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 6235866 Bytes = 6089.71 KiB = 5.95 MiB Load Address: 00d00000 Entry Point: 00d002a4 Image Name: Linux-5.7.0-rc2-g8659a0e0efdd Created: Fri May 22 14:29:22 2020 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 6204597 Bytes = 6059.18 KiB = 5.92 MiB Load Address: 00000000 Entry Point: 00000000 Image Name: Linux-5.7.0-rc2-g8659a0e0efdd Created: Fri May 22 14:29:22 2020 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 6235270 Bytes = 6089.13 KiB = 5.95 MiB Load Address: 00d00000 Entry Point: 00d002a4 Completed OK # rm -rf /kisskb/build/powerpc-fixes_mpc85xx_defconfig_powerpc-gcc4.9 # Build took: 0:02:29.296190