6ec33db1aa
So 'objtool --link -d vmlinux.o' gets surprised by this endbr64+endbr64 pattern in ___bpf_prog_run(): ___bpf_prog_run: 1e7680: ___bpf_prog_run+0x0 push %r12 1e7682: ___bpf_prog_run+0x2 mov %rdi,%r12 1e7685: ___bpf_prog_run+0x5 push %rbp 1e7686: ___bpf_prog_run+0x6 xor %ebp,%ebp 1e7688: ___bpf_prog_run+0x8 push %rbx 1e7689: ___bpf_prog_run+0x9 mov %rsi,%rbx 1e768c: ___bpf_prog_run+0xc movzbl (%rbx),%esi 1e768f: ___bpf_prog_run+0xf movzbl %sil,%edx 1e7693: ___bpf_prog_run+0x13 mov %esi,%eax 1e7695: ___bpf_prog_run+0x15 mov 0x0(,%rdx,8),%rdx 1e769d: ___bpf_prog_run+0x1d jmp 0x1e76a2 <__x86_indirect_thunk_rdx> 1e76a2: ___bpf_prog_run+0x22 endbr64 1e76a6: ___bpf_prog_run+0x26 endbr64 1e76aa: ___bpf_prog_run+0x2a mov 0x4(%rbx),%edx And crashes due to blindly dereferencing alt->insn->alt_group. Bail out on NULL ->alt_group, which produces this warning and continues with the disassembly, instead of a segfault: .git/O/vmlinux.o: warning: objtool: <alternative.1e769d>: failed to disassemble alternative Cc: Alexandre Chartre <alexandre.chartre@oracle.com> Cc: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Josh Poimboeuf <jpoimboe@kernel.org> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org> |
||
|---|---|---|
| Documentation | ||
| LICENSES | ||
| arch | ||
| block | ||
| certs | ||
| crypto | ||
| drivers | ||
| fs | ||
| include | ||
| init | ||
| io_uring | ||
| ipc | ||
| kernel | ||
| lib | ||
| mm | ||
| net | ||
| rust | ||
| samples | ||
| scripts | ||
| security | ||
| sound | ||
| tools | ||
| usr | ||
| virt | ||
| .clang-format | ||
| .clippy.toml | ||
| .cocciconfig | ||
| .editorconfig | ||
| .get_maintainer.ignore | ||
| .gitattributes | ||
| .gitignore | ||
| .mailmap | ||
| .pylintrc | ||
| .rustfmt.toml | ||
| COPYING | ||
| CREDITS | ||
| Kbuild | ||
| Kconfig | ||
| MAINTAINERS | ||
| Makefile | ||
| README | ||
README
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the reStructuredText markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.