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 E7DA6243376; Wed, 25 Feb 2026 01:40:37 +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=1771983638; cv=none; b=IYPgoi/7zqr5dCpUPOpNEnK21wiPcKD6qJeHNDtSKPpzDo1Wph6XpIrtFwens/paewor1szf/NXD2M2egaed4AXz+K8+k5Nn6y6H6ci6mZwu6yWJuFr+jWXsuw2fjGmPVkSQm37FMXkA0e+9JQLfhoy8KB8VJfts1qEBrWOXT8Y= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1771983638; c=relaxed/simple; bh=wHNcfAXhMFRn/J6a5//eeDv4UfKL9qHvwG81aC0DzHE=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=CSME9IqApwNPLW9kqOjV3aUtTutkdBYMikYRVupUgsezDQbZWARxTQXx+YAtlYxILEuhqDfu5Exc4KVZXdjV3jBCqn0o6M23l4F9mXWtj1kxFP0Tuz2X6WxgSk7YXB4eAmpIC5/Oz8gi7r5IxGaMpGcmwvHmpJwAONMnH+vuXXM= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=sAcSueXU; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="sAcSueXU" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 66849C116D0; Wed, 25 Feb 2026 01:40:37 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1771983637; bh=wHNcfAXhMFRn/J6a5//eeDv4UfKL9qHvwG81aC0DzHE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=sAcSueXU7EdfksYNqntAIeYJE86kNiOjrXuVya3V08mPvZLEyewpQZYV2zX5Tz5Oq LOLqcO8360j+ZMWnONcIk4lICGtzvgXfHTy2qFkFze9qF8JUMs8xIrHRhAubOAbVFs QLticck9IjRG3qUoNNHq+ky36N9IYljHM+GGLImM= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Heiko Carstens , Alexander Egorenkov , Sasha Levin Subject: [PATCH 6.19 726/781] s390/kexec: Make KEXEC_SIG available when CONFIG_MODULES=n Date: Tue, 24 Feb 2026 17:23:55 -0800 Message-ID: <20260225012417.542555360@linuxfoundation.org> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20260225012359.695468795@linuxfoundation.org> References: <20260225012359.695468795@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.19-stable review patch. If anyone has any objections, please let me know. ------------------ From: Alexander Egorenkov [ Upstream commit dd3411959b57df6e05a3ccbac67b0a836871c0c4 ] The commit c8424e776b09 ("MODSIGN: Export module signature definitions") replaced the dependency of KEXEC_SIG on SYSTEM_DATA_VERIFICATION with the dependency on MODULE_SIG_FORMAT. This change disables KEXEC_SIG in s390 kernels built with MODULES=n if nothing else selects MODULE_SIG_FORMAT. Furthermore, the signature verification in s390 kexec does not require MODULE_SIG_FORMAT because it requires only the struct module_signature and, therefore, does not depend on code in kernel/module_signature.c. But making ARCH_SUPPORTS_KEXEC_SIG depend on SYSTEM_DATA_VERIFICATION is also incorrect because it makes KEXEC_SIG available on s390 only if some other arbitrary option (for instance a file system or device driver) selects it directly or indirectly. To properly make KEXEC_SIG available for s390 kernels built with MODULES=y as well as MODULES=n _and_ also not depend on arbitrary options selecting SYSTEM_DATA_VERIFICATION, set ARCH_SUPPORTS_KEXEC_SIG=y for s390 and select SYSTEM_DATA_VERIFICATION when KEXEC_SIG=y. Fixes: c8424e776b09 ("MODSIGN: Export module signature definitions") Suggested-by: Heiko Carstens Signed-off-by: Alexander Egorenkov Signed-off-by: Heiko Carstens Signed-off-by: Sasha Levin --- arch/s390/Kconfig | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/arch/s390/Kconfig b/arch/s390/Kconfig index 0e5fad5f06ca1..783be50f38f2b 100644 --- a/arch/s390/Kconfig +++ b/arch/s390/Kconfig @@ -275,6 +275,7 @@ config S390 select SPARSE_IRQ select SWIOTLB select SYSCTL_EXCEPTION_TRACE + select SYSTEM_DATA_VERIFICATION if KEXEC_SIG select THREAD_INFO_IN_TASK select TRACE_IRQFLAGS_SUPPORT select TTY @@ -301,7 +302,7 @@ config ARCH_SUPPORTS_KEXEC_FILE def_bool y config ARCH_SUPPORTS_KEXEC_SIG - def_bool MODULE_SIG_FORMAT + def_bool y config ARCH_SUPPORTS_KEXEC_PURGATORY def_bool y -- 2.51.0