Buildresult: powerpc-next/85xx/tqm8555_defconfig/powerpc-gcc5 built on Mar 1 2019, 03:03

kisskb

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Status:	OK
Date/Time:	Mar 1 2019, 03:03
Duration:	0:00:23.295519
Builder:	ka4
Revision:	powerpc/64s: Implement KUAP for Radix MMU (`d02d2129641d6cd22492ddc85e11d112eb0d5a6f)`
Target:	powerpc-next/85xx/tqm8555_defconfig/powerpc-gcc5
Branch:	powerpc-next
Compiler:	powerpc-gcc5 (powerpc64-linux-gcc (GCC) 5.5.0 / GNU ld (GNU Binutils) 2.29.1.20170915)
Config:	85xx/tqm8555_defconfig (download)
Log:	Download original No warnings found in log. Full Log # git rev-parse -q --verify d02d2129641d6cd22492ddc85e11d112eb0d5a6f^{commit} d02d2129641d6cd22492ddc85e11d112eb0d5a6f already have revision, skipping fetch # git checkout -q -f -B kisskb d02d2129641d6cd22492ddc85e11d112eb0d5a6f # git clean -qxdf # < git log -1 # commit d02d2129641d6cd22492ddc85e11d112eb0d5a6f # Author: Russell Currey <ruscur@russell.cc> # Date: Fri Mar 1 01:49:17 2019 +1100 # # powerpc/64s: Implement KUAP for Radix MMU # # Kernel Userspace Access Prevention utilises a feature of the Radix MMU # which disallows read and write access to userspace addresses. By # utilising this, the kernel is prevented from accessing user data from # outside of trusted paths that perform proper safety checks, such as # copy_{to/from}_user() and friends. # # Userspace access is disabled from early boot and is only enabled when # performing an operation like copy_{to/from}_user(). The register that # controls this (AMR) does not prevent userspace from accessing itself, # so there is no need to save and restore when entering and exiting # userspace. # # This feature has a slight performance impact which I roughly measured # to be 3% slower in the worst case (performing 1GB of 1 byte # read()/write() syscalls), and is gated behind the CONFIG_PPC_KUAP # option for performance-critical builds. # # This feature can be tested by using the lkdtm driver (CONFIG_LKDTM=y) # and performing the following: # # # (echo ACCESS_USERSPACE) > [debugfs]/provoke-crash/DIRECT # # If enabled, this should send SIGSEGV to the thread. # # mpe: Drop the unused paca flags. Zero the UAMOR to be safe. Save the # AMR when we enter the kernel from the kernel and then lock it again. # Restore on the way back to the kernel. This means we handle nesting of # interrupts properly, ie. we are protected inside the page fault # handler caused by a user access. Add paranoid checking of AMR in # switch and syscall return. Add an isync() to prevent_user_access() # # Signed-off-by: Russell Currey <ruscur@russell.cc> # Signed-off-by: Michael Ellerman <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 d02d2129641d6cd22492ddc85e11d112eb0d5a6f # < make -s -j 120 ARCH=powerpc O=/kisskb/build/powerpc-next_85xx_tqm8555_defconfig_powerpc-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux- 85xx/tqm8555_defconfig # make -s -j 120 ARCH=powerpc O=/kisskb/build/powerpc-next_85xx_tqm8555_defconfig_powerpc-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux- INFO: Uncompressed kernel (size 0x4e2730) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0x500000) INFO: Uncompressed kernel (size 0x4d2008) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0x500000) Image Name: Linux-5.0.0-rc2-gd02d2129641d Created: Fri Mar 1 03:03:48 2019 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 2509722 Bytes = 2450.90 KiB = 2.39 MiB Load Address: 00000000 Entry Point: 00000000 Image Name: Linux-5.0.0-rc2-gd02d2129641d Created: Fri Mar 1 03:03:48 2019 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 2539237 Bytes = 2479.72 KiB = 2.42 MiB Load Address: 00500000 Entry Point: 00500314 Completed OK # rm -rf /kisskb/build/powerpc-next_85xx_tqm8555_defconfig_powerpc-gcc5 # Build took: 0:00:23.295519

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