From nobody Fri Dec 19 06:32:41 2025 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 452B325FA32 for ; Tue, 8 Apr 2025 07:02:27 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1744095747; cv=none; b=s7rsHmARZ1JloivlNnjZjlzD2r3NQkc12mA0/qGNEWeK6zp5Dp6Kk+fbYEj1ohA4h67a2mTGXlg88goSCOH9CphZuQIkEtoWU9U0kcrRpcd0Hd7EUgS9eThj8Wmz1c3VHvcCfQtne7fA4HwC7ARuDNRJrHK9WtFQ0itd1uMsyqg= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1744095747; c=relaxed/simple; bh=SBUDINiLyQ7t66jKolDruYGdHapsNuOiOzSyeiA3nqg=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=AnS7bb/sSRekBYuuFkjtH9Icq5FqWJpFNIRN1EYP3lpY1sVzRbsJWfrWk8nUvsbOu6CoKXV/I+otWNuJDxQT3mR7nFZ02XqZn3Uluh8iuD2qPuW4ngJ9ZeQqgo8ZYV8iPARhyE+B2bMF13ktN9Vfxn2VArvAPkiubl42e4z+lIs= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=ehr36aq3; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="ehr36aq3" Received: by smtp.kernel.org (Postfix) with ESMTPSA id CEADDC4CEEC; Tue, 8 Apr 2025 07:02:26 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1744095747; bh=SBUDINiLyQ7t66jKolDruYGdHapsNuOiOzSyeiA3nqg=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=ehr36aq3g4yD9MDkfuZOnbbQlwCL1vDRhazEB5LNY+ji13HMQDSzBI4WMFcNjHHdc zaO5PcKnHNltbkrhVp7FXU8m3myan5PqxXuvWQy1oEm7OAzgFXo4q3Hoz3DbF7pvXK P+5vsy7f7i/4tjjgFKZ2PODVvrrtM+yP1Q8INAFmX/OtO2HHkitZHb4gVJRet2hliK wVgTm3K40EOemYmkzsvSz+VEKii8h+AewGNWj8NQRDQI50xGF9LSilkpWuD5xNm1jo VU3F1trO9nXUoSqBjdx2dvR7f+h+EhNDInC7e5yGbQ6mY/+Ohf95fr01/95UOwAHQK 2r1tXgL2YSWpQ== From: Josh Poimboeuf To: x86@kernel.org Cc: linux-kernel@vger.kernel.org, Peter Zijlstra , Ingo Molnar , Juergen Gross Subject: [PATCH v4 3/4] objtool: Stop UNRET validation on UD2 Date: Tue, 8 Apr 2025 00:02:15 -0700 Message-ID: X-Mailer: git-send-email 2.49.0 In-Reply-To: References: Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" 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 --- tools/objtool/check.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/tools/objtool/check.c b/tools/objtool/check.c index 2c703b960420..2dd89b0f4d5e 100644 --- a/tools/objtool/check.c +++ b/tools/objtool/check.c @@ -3902,6 +3902,9 @@ static int validate_unret(struct objtool_file *file, = struct instruction *insn) break; } =20 + if (insn->dead_end) + return 0; + if (!next) { WARN_INSN(insn, "teh end!"); return 1; --=20 2.49.0