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| author | Julien Thierry <jthierry@redhat.com> | 2020-03-27 18:28:41 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-06-20 11:25:07 +0300 |
| commit | 472f87598a3b450199c5be756a75f3e18c1a5230 (patch) | |
| tree | 0f7d7cadea0c1be5f2554276ca1a96856eccf5c5 /tools | |
| parent | 94327dc325e68f3f27b09d867345471195d3a0d7 (diff) | |
| download | linux-472f87598a3b450199c5be756a75f3e18c1a5230.tar.xz | |
objtool: Ignore empty alternatives
[ Upstream commit 7170cf47d16f1ba29eca07fd818870b7af0a93a5 ]
The .alternatives section can contain entries with no original
instructions. Objtool will currently crash when handling such an entry.
Just skip that entry, but still give a warning to discourage useless
entries.
Signed-off-by: Julien Thierry <jthierry@redhat.com>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Miroslav Benes <mbenes@suse.cz>
Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'tools')
| -rw-r--r-- | tools/objtool/check.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/tools/objtool/check.c b/tools/objtool/check.c index 5685fe2c7a7d..247fbb5f6a38 100644 --- a/tools/objtool/check.c +++ b/tools/objtool/check.c @@ -778,6 +778,12 @@ static int add_special_section_alts(struct objtool_file *file) } if (special_alt->group) { + if (!special_alt->orig_len) { + WARN_FUNC("empty alternative entry", + orig_insn->sec, orig_insn->offset); + continue; + } + ret = handle_group_alt(file, special_alt, orig_insn, &new_insn); if (ret) |