kernel/trace/trace_uprobe.o: warning: objtool: bpf_get_uprobe_info()+0x3e2: unreachable instruction

Thursday, 22 July 2021

CC: linux-kernel(a)vger.kernel.org
TO: Vasily Gorbik <gor(a)linux.ibm.com&gt;
CC: Josh Poimboeuf <jpoimboe(a)redhat.com&gt;

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   8cae8cd89f05f6de223d63e6d15e31c8ba9cf53b
commit: c199f64ff93c48a45add92eee4456ffcabfc838e instrumentation.h: Avoid using inline asm
operand modifiers
date:   9 weeks ago
config: x86_64-randconfig-r012-20210712 (attached as .config)
compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project
8d69635ed9ecf36fd0ca85906bfde17949671cbe)
reproduce (this is a W=1 build):
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O
~/bin/make.cross
        chmod +x ~/bin/make.cross
        # install x86_64 cross compiling tool for clang build
        # apt-get install binutils-x86-64-linux-gnu
        #
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit...
        git remote add linus
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
        git fetch --no-tags linus master
        git checkout c199f64ff93c48a45add92eee4456ffcabfc838e
        # save the attached .config to linux build tree
        mkdir build_dir
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross O=build_dir ARCH=x86_64
SHELL=/bin/bash

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp(a)intel.com&gt;

All warnings (new ones prefixed by >>):

...
> kernel/trace/trace_uprobe.o: warning: objtool:
bpf_get_uprobe_info()+0x3e2: unreachable instruction --
...
> lib/bch.o: warning: objtool: bch_encode()+0xec: unreachable
instruction --
...
> lib/nlattr.o: warning: objtool: __nla_validate_parse()+0x1eca:
unreachable instruction --
...
> lib/xarray.o: warning: objtool: __xa_store()+0xe6: unreachable
instruction --
...
> kernel/bpf/cgroup.o: warning: objtool:
__cgroup_bpf_attach()+0x244: unreachable instruction --
...
> lib/crypto/chacha20poly1305.o: warning: objtool:
chacha20poly1305_crypt_sg_inplace()+0x10d: unreachable instruction --
...
> kernel/events/uprobes.o: warning: objtool:
uprobe_write_opcode()+0x379: unreachable instruction --
...
> kernel/events/ring_buffer.o: warning: objtool:
perf_aux_output_begin()+0x2cd: unreachable instruction --
...
> kernel/fork.o: warning: objtool: copy_process()+0xf2f:
unreachable instruction --
...
> kernel/cpu.o: warning: objtool: cpuhp_issue_call()+0x211:
unreachable instruction --
...
> kernel/kthread.o: warning: objtool: kthread_park()+0x1b0:
unreachable instruction ..

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org

2022

2021

2020

2019