add boot partition size

hc

2023-12-11 d2ccde1c8e90d38cee87a1b0309ad2827f3fd30d

 kernel/kernel/kexec.c
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@@ -1,9 +1,7 @@
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+// SPDX-License-Identifier: GPL-2.0-only
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 /*
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  * kexec.c - kexec_load system call
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  * Copyright (C) 2002-2004 Eric Biederman  <ebiederm@xmission.com>
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- *
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- * This source code is licensed under the GNU General Public License,
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- * Version 2.  See the file COPYING for more details.
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  */
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 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
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@@ -161,6 +159,10 @@
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 	kimage_terminate(image);
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+	ret = machine_kexec_post_load(image);
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+	if (ret)
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+		goto out;
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+
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 	/* Install the new kernel and uninstall the old */
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 	image = xchg(dest_image, image);
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..
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@@ -203,11 +205,19 @@
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 		return -EPERM;
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 	/* Permit LSMs and IMA to fail the kexec */
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-	result = security_kernel_load_data(LOADING_KEXEC_IMAGE);
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+	result = security_kernel_load_data(LOADING_KEXEC_IMAGE, false);
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 	if (result < 0)
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 		return result;
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 	/*
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+	 * kexec can be used to circumvent module loading restrictions, so
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+	 * prevent loading in that case
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+	 */
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+	result = security_locked_down(LOCKDOWN_KEXEC);
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+	if (result)
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+		return result;
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+
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+	/*
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 	 * Verify we have a legal set of flags
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 	 * This leaves us room for future extensions.
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 	 */