Public bug reported: $ objdump -d
a.out: file format elf64-x86-64 objdump: BFD (GNU Binutils for Ubuntu) 2.26.1 internal error, aborting at ../../bfd/elf64-x86-64.c:6089 in elf_x86_64_get_plt_sym_val objdump: Please report this bug. Difficulty: a.out is using the retpoline mitigation <https://support.google.com/faqs/answer/7625886> for the Spectre vulnerability, variant 2: branch target injection (CVE-2017-5715). I have attached the binary in question; it should be small enough to disassemble in its entirety. For the record, the executable was built with Clang and lld, from LLVM SVN r321862, plus the retpoline patch at <https://reviews.llvm.org/D41723>, using the following commands: $ clang -mretpoline -c -O temp.c $ ld.lld -z retpolineplt -dynamic-linker /lib64/ld-linux-x86-64.so.2 temp.o /lib/x86_64-linux-gnu/libc.so.6 ProblemType: Bug DistroRelease: Ubuntu 16.04 Package: binutils 2.26.1-1ubuntu1~16.04.5 ProcVersionSignature: Ubuntu 4.4.0-109.132-generic 4.4.98 Uname: Linux 4.4.0-109-generic x86_64 NonfreeKernelModules: nvidia_uvm nvidia_drm nvidia_modeset nvidia ApportVersion: 2.20.1-0ubuntu2.15 Architecture: amd64 CurrentDesktop: XFCE Date: Mon Jan 15 05:03:48 2018 Dependencies: gcc-6-base 6.0.1-0ubuntu1 libc6 2.23-0ubuntu9 libgcc1 1:6.0.1-0ubuntu1 zlib1g 1:1.2.8.dfsg-2ubuntu4.1 SourcePackage: binutils UpgradeStatus: Upgraded to xenial on 2016-08-01 (532 days ago) ** Affects: binutils (Ubuntu) Importance: Undecided Status: New ** Tags: amd64 apport-bug xenial ** Attachment added: "a.out" https://bugs.launchpad.net/bugs/1743350/+attachment/5037262/+files/a.out -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to binutils in Ubuntu. https://bugs.launchpad.net/bugs/1743350 Title: objdump internal error with retpoline-equipped binary Status in binutils package in Ubuntu: New Bug description: $ objdump -d a.out: file format elf64-x86-64 objdump: BFD (GNU Binutils for Ubuntu) 2.26.1 internal error, aborting at ../../bfd/elf64-x86-64.c:6089 in elf_x86_64_get_plt_sym_val objdump: Please report this bug. Difficulty: a.out is using the retpoline mitigation <https://support.google.com/faqs/answer/7625886> for the Spectre vulnerability, variant 2: branch target injection (CVE-2017-5715). I have attached the binary in question; it should be small enough to disassemble in its entirety. For the record, the executable was built with Clang and lld, from LLVM SVN r321862, plus the retpoline patch at <https://reviews.llvm.org/D41723>, using the following commands: $ clang -mretpoline -c -O temp.c $ ld.lld -z retpolineplt -dynamic-linker /lib64/ld-linux-x86-64.so.2 temp.o /lib/x86_64-linux-gnu/libc.so.6 ProblemType: Bug DistroRelease: Ubuntu 16.04 Package: binutils 2.26.1-1ubuntu1~16.04.5 ProcVersionSignature: Ubuntu 4.4.0-109.132-generic 4.4.98 Uname: Linux 4.4.0-109-generic x86_64 NonfreeKernelModules: nvidia_uvm nvidia_drm nvidia_modeset nvidia ApportVersion: 2.20.1-0ubuntu2.15 Architecture: amd64 CurrentDesktop: XFCE Date: Mon Jan 15 05:03:48 2018 Dependencies: gcc-6-base 6.0.1-0ubuntu1 libc6 2.23-0ubuntu9 libgcc1 1:6.0.1-0ubuntu1 zlib1g 1:1.2.8.dfsg-2ubuntu4.1 SourcePackage: binutils UpgradeStatus: Upgraded to xenial on 2016-08-01 (532 days ago) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/binutils/+bug/1743350/+subscriptions -- 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
