# git rev-parse -q --verify d04cb29a7ef9e90cb0e4f16953f2d7484a9a48fb^{commit} d04cb29a7ef9e90cb0e4f16953f2d7484a9a48fb already have revision, skipping fetch # git checkout -q -f -B kisskb d04cb29a7ef9e90cb0e4f16953f2d7484a9a48fb # git clean -qxdf # < git log -1 # commit d04cb29a7ef9e90cb0e4f16953f2d7484a9a48fb # Author: Andrew Donnellan # Date: Tue Dec 10 00:22:21 2019 +1100 # # powerpc: Fix __clear_user() with KUAP enabled # # The KUAP implementation adds calls in clear_user() to enable and disable # access to userspace memory. However, it doesn't add these to # __clear_user(), which is used in the ptrace regset code. # # As there's only one direct user of __clear_user(), and the time taken to # set the AMR for KUAP purposes is going to dominate the cost of a quick # access_ok(), there's not much point having a separate path. # # Rename __clear_user() to clear_user_asm(), and make __clear_user() just # call clear_user(). # # Reported-by: syzbot+f25ecf4b2982d8c7a640@syzkaller-ppc64.appspotmail.com # Reported-by: Daniel Axtens # Suggested-by: Michael Ellerman # Fixes: de78a9c42a79 ("powerpc: Add a framework for Kernel Userspace Access Protection") # Signed-off-by: Andrew Donnellan # Signed-off-by: Michael Ellerman # Link: https://lore.kernel.org/r/20191209132221.15328-1-ajd@linux.ibm.com # < /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 d04cb29a7ef9e90cb0e4f16953f2d7484a9a48fb # < make -s -j 80 ARCH=powerpc O=/kisskb/build/powerpc-fixes_85xx_mpc85xx_cds_defconfig_powerpc-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux- 85xx/mpc85xx_cds_defconfig # make -s -j 80 ARCH=powerpc O=/kisskb/build/powerpc-fixes_85xx_mpc85xx_cds_defconfig_powerpc-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux- /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 0x532f68) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0x600000) INFO: Uncompressed kernel (size 0x532f68) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0x600000) INFO: Uncompressed kernel (size 0x532f68) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0x600000) INFO: Uncompressed kernel (size 0x52286c) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0x600000) Image Name: Linux-5.5.0-rc1-gd04cb29a7ef9 Created: Sat Dec 14 09:25:04 2019 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 2690161 Bytes = 2627.11 KiB = 2.57 MiB Load Address: 00000000 Entry Point: 00000000 Image Name: Linux-5.5.0-rc1-gd04cb29a7ef9 Created: Sat Dec 14 09:25:04 2019 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 2719365 Bytes = 2655.63 KiB = 2.59 MiB Load Address: 00600000 Entry Point: 006002a4 Image Name: Linux-5.5.0-rc1-gd04cb29a7ef9 Created: Sat Dec 14 09:25:04 2019 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 2719359 Bytes = 2655.62 KiB = 2.59 MiB Load Address: 00600000 Entry Point: 006002a4 Image Name: Linux-5.5.0-rc1-gd04cb29a7ef9 Created: Sat Dec 14 09:25:04 2019 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 2720467 Bytes = 2656.71 KiB = 2.59 MiB Load Address: 00600000 Entry Point: 006002a4 Completed OK # rm -rf /kisskb/build/powerpc-fixes_85xx_mpc85xx_cds_defconfig_powerpc-gcc5 # Build took: 0:00:43.339924