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objtool: Stop UNRET validation on UD2

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[ Upstream commit 9f9cc012c2 ]

In preparation for simplifying INSN_SYSCALL, make validate_unret()
terminate control flow on UD2 just like validate_branch() already does.

Signed-off-by: Josh Poimboeuf <jpoimboe@kernel.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Link: https://lore.kernel.org/r/ce841269e7e28c8b7f32064464a9821034d724ff.1744095216.git.jpoimboe@kernel.org
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Josh Poimboeuf 2025-04-08 00:02:15 -07:00 committed by Greg Kroah-Hartman
parent 04d4154222
commit a87b3980d0
1 changed files with 3 additions and 0 deletions
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3
tools/objtool/check.c
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@ -3249,6 +3249,9 @@ static int validate_entry(struct objtool_file *file, struct instruction *insn)
break;
}
if (insn->dead_end)
return 0;
if (!next) {
WARN_FUNC("teh end!", insn->sec, insn->offset);
return -1;