Buildresult: powerpc-fixes/x86_64-allnoconfig/x86_64-gcc4.9 built on May 21 2021, 23:04

kisskb

Revisions | Branches | Compilers | Configs | Build Results | Build Failures |

Status:	OK
Date/Time:	May 21 2021, 23:04
Duration:	0:00:27.849040
Builder:	ka2
Revision:	powerpc/kprobes: Fix validation of prefixed instructions across page boundary (`b49f9d9b0e428909796b4a7e7f1049f489859e0f)`
Target:	powerpc-fixes/x86_64-allnoconfig/x86_64-gcc4.9
Branch:	powerpc-fixes
Compiler:	x86_64-gcc4.9 (x86_64-linux-gcc (GCC) 4.9.4 / GNU ld (GNU Binutils) 2.29.1.20170915)
Config:	allnoconfig (download)
Log:	Download original Possible warnings (2) warning: The last gc run reported the following. Please correct the root cause warning: There are too many unreachable loose objects; run 'git prune' to remove them. Full Log # git rev-parse -q --verify b49f9d9b0e428909796b4a7e7f1049f489859e0f^{commit} # git fetch -q -n -f git://gitlab.ozlabs.ibm.com/linuxppc/linux.git fixes-test warning: The last gc run reported the following. Please correct the root cause and remove .git/gc.log. Automatic cleanup will not be performed until the file is removed. warning: There are too many unreachable loose objects; run 'git prune' to remove them. # git rev-parse -q --verify b49f9d9b0e428909796b4a7e7f1049f489859e0f^{commit} b49f9d9b0e428909796b4a7e7f1049f489859e0f # git checkout -q -f -B kisskb b49f9d9b0e428909796b4a7e7f1049f489859e0f # git clean -qxdf # < git log -1 # commit b49f9d9b0e428909796b4a7e7f1049f489859e0f # Author: Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com> # Date: Wed May 19 16:17:17 2021 +0530 # # powerpc/kprobes: Fix validation of prefixed instructions across page boundary # # When checking if the probed instruction is the suffix of a prefixed # instruction, we access the instruction at the previous word. If the # probed instruction is the very first word of a module, we can end up # trying to access an invalid page. # # Fix this by skipping the check for all instructions at the beginning of # a page. Prefixed instructions cannot cross a 64-byte boundary and as # such, we don't expect to encounter a suffix as the very first word in a # page for kernel text. Even if there are prefixed instructions crossing # a page boundary (from a module, for instance), the instruction will be # illegal, so preventing probing on the suffix of such prefix instructions # isn't worthwhile. # # Fixes: b4657f7650ba ("powerpc/kprobes: Don't allow breakpoints on suffixes") # Cc: stable@vger.kernel.org # v5.8+ # Reported-by: Christophe Leroy <christophe.leroy@csgroup.eu> # Signed-off-by: Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com> # Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> # Link: https://lore.kernel.org/r/0df9a032a05576a2fa8e97d1b769af2ff0eafbd6.1621416666.git.naveen.n.rao@linux.vnet.ibm.com # < /opt/cross/kisskb/korg/gcc-4.9.4-nolibc/x86_64-linux/bin/x86_64-linux-gcc --version # < /opt/cross/kisskb/korg/gcc-4.9.4-nolibc/x86_64-linux/bin/x86_64-linux-ld --version # < git log --format=%s --max-count=1 b49f9d9b0e428909796b4a7e7f1049f489859e0f # < make -s -j 48 ARCH=x86_64 O=/kisskb/build/powerpc-fixes_x86_64-allnoconfig_x86_64-gcc4.9 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-4.9.4-nolibc/x86_64-linux/bin/x86_64-linux- allnoconfig # < make -s -j 48 ARCH=x86_64 O=/kisskb/build/powerpc-fixes_x86_64-allnoconfig_x86_64-gcc4.9 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-4.9.4-nolibc/x86_64-linux/bin/x86_64-linux- help # make -s -j 48 ARCH=x86_64 O=/kisskb/build/powerpc-fixes_x86_64-allnoconfig_x86_64-gcc4.9 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-4.9.4-nolibc/x86_64-linux/bin/x86_64-linux- olddefconfig # make -s -j 48 ARCH=x86_64 O=/kisskb/build/powerpc-fixes_x86_64-allnoconfig_x86_64-gcc4.9 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-4.9.4-nolibc/x86_64-linux/bin/x86_64-linux- Completed OK # rm -rf /kisskb/build/powerpc-fixes_x86_64-allnoconfig_x86_64-gcc4.9 # Build took: 0:00:27.849040

© Michael Ellerman 2006-2018.