6cfb521ac0
Add a marker for retpoline to the module VERMAGIC. This catches the case when a non RETPOLINE compiled module gets loaded into a retpoline kernel, making it insecure. It doesn't handle the case when retpoline has been runtime disabled. Even in this case the match of the retcompile status will be enforced. This implies that even with retpoline run time disabled all modules loaded need to be recompiled. Signed-off-by: Andi Kleen <ak@linux.intel.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Acked-by: David Woodhouse <dwmw@amazon.co.uk> Cc: rusty@rustcorp.com.au Cc: arjan.van.de.ven@intel.com Cc: jeyu@kernel.org Cc: torvalds@linux-foundation.org Link: https://lkml.kernel.org/r/20180116205228.4890-1-andi@firstfloor.org
48 lines
1.2 KiB
C
48 lines
1.2 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#include <generated/utsrelease.h>
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/* Simply sanity version stamp for modules. */
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#ifdef CONFIG_SMP
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#define MODULE_VERMAGIC_SMP "SMP "
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#else
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#define MODULE_VERMAGIC_SMP ""
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#endif
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#ifdef CONFIG_PREEMPT
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#define MODULE_VERMAGIC_PREEMPT "preempt "
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#else
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#define MODULE_VERMAGIC_PREEMPT ""
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#endif
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#ifdef CONFIG_MODULE_UNLOAD
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#define MODULE_VERMAGIC_MODULE_UNLOAD "mod_unload "
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#else
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#define MODULE_VERMAGIC_MODULE_UNLOAD ""
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#endif
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#ifdef CONFIG_MODVERSIONS
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#define MODULE_VERMAGIC_MODVERSIONS "modversions "
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#else
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#define MODULE_VERMAGIC_MODVERSIONS ""
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#endif
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#ifndef MODULE_ARCH_VERMAGIC
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#define MODULE_ARCH_VERMAGIC ""
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#endif
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#ifdef RANDSTRUCT_PLUGIN
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#include <generated/randomize_layout_hash.h>
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#define MODULE_RANDSTRUCT_PLUGIN "RANDSTRUCT_PLUGIN_" RANDSTRUCT_HASHED_SEED
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#else
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#define MODULE_RANDSTRUCT_PLUGIN
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#endif
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#ifdef RETPOLINE
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#define MODULE_VERMAGIC_RETPOLINE "retpoline "
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#else
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#define MODULE_VERMAGIC_RETPOLINE ""
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#endif
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#define VERMAGIC_STRING \
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UTS_RELEASE " " \
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MODULE_VERMAGIC_SMP MODULE_VERMAGIC_PREEMPT \
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MODULE_VERMAGIC_MODULE_UNLOAD MODULE_VERMAGIC_MODVERSIONS \
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MODULE_ARCH_VERMAGIC \
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MODULE_RANDSTRUCT_PLUGIN \
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MODULE_VERMAGIC_RETPOLINE
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