You have been subscribed to a public bug: >From https://lkml.org/lkml/2014/10/10/272:
gcc versions 4.8.[012] and 4.9.0 generates code that prematurely adjusts the stack pointer such that still-to-be-referenced locals are below the stack pointer, which allows them to be overwritten by interrupts. rmk already has a patch in his for-next branch that blacklist this compiler: http://ftp.arm.linux.org.uk/cgit/linux-arm.git/commit/?h=for- next&id=7fc150543c73de71859631c8a6b17e3067fe7617 and Trusty's toolchain is affected: [flag@stinkpad linux-2.6]$ make ARCH=arm CROSS_COMPILE=/usr/bin/arm-linux-gnueabihf- HOSTCC scripts/basic/fixdep HOSTCC scripts/kconfig/conf.o SHIPPED scripts/kconfig/zconf.tab.c SHIPPED scripts/kconfig/zconf.lex.c HOSTCC scripts/kconfig/zconf.tab.o HOSTLD scripts/kconfig/conf scripts/kconfig/conf --silentoldconfig Kconfig CHK include/config/kernel.release CHK include/generated/uapi/linux/version.h CHK include/generated/utsrelease.h make[1]: `include/generated/mach-types.h' is up to date. CC kernel/bounds.s GEN include/generated/bounds.h CC arch/arm/kernel/asm-offsets.s arch/arm/kernel/asm-offsets.c:53:2: error: #error Your compiler is too buggy; it is known to miscompile kernels #error Your compiler is too buggy; it is known to miscompile kernels ^ arch/arm/kernel/asm-offsets.c:54:2: error: #error and result in filesystem corruption and oopses. #error and result in filesystem corruption and oopses. ^ make[1]: *** [arch/arm/kernel/asm-offsets.s] Error 1 make: *** [prepare0] Error 2 [flag@stinkpad linux-2.6]$ [flag@stinkpad linux-2.6]$ gcc -v Using built-in specs. COLLECT_GCC=gcc COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-linux-gnu/4.8/lto-wrapper Target: x86_64-linux-gnu Configured with: ../src/configure -v --with-pkgversion='Ubuntu 4.8.2-19ubuntu1' --with-bugurl=file:///usr/share/doc/gcc-4.8/README.Bugs --enable-languages=c,c++,java,go,d,fortran,objc,obj-c++ --prefix=/usr --program-suffix=-4.8 --enable-shared --enable-linker-build-id --libexecdir=/usr/lib --without-included-gettext --enable-threads=posix --with-gxx-include-dir=/usr/include/c++/4.8 --libdir=/usr/lib --enable-nls --with-sysroot=/ --enable-clocale=gnu --enable-libstdcxx-debug --enable-libstdcxx-time=yes --enable-gnu-unique-object --disable-libmudflap --enable-plugin --with-system-zlib --disable-browser-plugin --enable-java-awt=gtk --enable-gtk-cairo --with-java-home=/usr/lib/jvm/java-1.5.0-gcj-4.8-amd64/jre --enable-java-home --with-jvm-root-dir=/usr/lib/jvm/java-1.5.0-gcj-4.8-amd64 --with-jvm-jar-dir=/usr/lib/jvm-exports/java-1.5.0-gcj-4.8-amd64 --with-arch-directory=amd64 --with-ecj-jar=/usr/share/java/eclipse-ecj.jar --enable-objc-gc --enable-multiarch --disable-werror --with-arch-3 2=i686 --with-abi=m64 --with-multilib-list=m32,m64,mx32 --with-tune=generic --enable-checking=release --build=x86_64-linux-gnu --host=x86_64-linux-gnu --target=x86_64-linux-gnu Thread model: posix gcc version 4.8.2 (Ubuntu 4.8.2-19ubuntu1) [flag@stinkpad linux-2.6]$ [flag@stinkpad linux-2.6]$ dpkg -l | grep linux-gnueabihf- ii gcc-4.6-arm-linux-gnueabihf-base 4.6.3-8ubuntu1cross1.67 all GCC, the GNU Compiler Collection (base package) ii gcc-4.8-arm-linux-gnueabihf-base 4.8.2-16ubuntu4cross0.11 amd64 GCC, the GNU Compiler Collection (base package) ** Affects: gcc-4.8 (Ubuntu) Importance: Undecided Status: New -- gcc PR 58854 - 4.8.1 and 4.8.2 are known to miscompile the ARM kernel https://bugs.launchpad.net/bugs/1383410 You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to gcc-4.8 in Ubuntu. -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp
