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Revision 0c18f29aae7ce3dadd26d8ee3505d07cc982df75 authored by Mimi Zohar on 22 June 2021, 11:36:41 UTC, committed by Linus Torvalds on 22 June 2021, 18:13:19 UTC 
module: limit enabling module.sig_enforce
 
Irrespective as to whether CONFIG_MODULE_SIG is configured, specifying
"module.sig_enforce=1" on the boot command line sets "sig_enforce".
Only allow "sig_enforce" to be set when CONFIG_MODULE_SIG is configured.

This patch makes the presence of /sys/module/module/parameters/sig_enforce
dependent on CONFIG_MODULE_SIG=y.

Fixes: fda784e50aac ("module: export module signature enforcement status")
Reported-by: Nayna Jain <nayna@linux.ibm.com>
Tested-by: Mimi Zohar <zohar@linux.ibm.com>
Tested-by: Jessica Yu <jeyu@kernel.org>
Signed-off-by: Mimi Zohar <zohar@linux.ibm.com>
Signed-off-by: Jessica Yu <jeyu@kernel.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Raw File
sp_fint.c 
// SPDX-License-Identifier: GPL-2.0-only
/* IEEE754 floating point arithmetic
 * single precision
 */
/*
 * MIPS floating point support
 * Copyright (C) 1994-2000 Algorithmics Ltd.
 */

#include "ieee754sp.h"

union ieee754sp ieee754sp_fint(int x)
{
	unsigned int xm;
	int xe;
	int xs;

	ieee754_clearcx();

	if (x == 0)
		return ieee754sp_zero(0);
	if (x == 1 || x == -1)
		return ieee754sp_one(x < 0);
	if (x == 10 || x == -10)
		return ieee754sp_ten(x < 0);

	xs = (x < 0);
	if (xs) {
		if (x == (1 << 31))
			xm = ((unsigned) 1 << 31);	/* max neg can't be safely negated */
		else
			xm = -x;
	} else {
		xm = x;
	}
	xe = SP_FBITS + 3;

	if (xm >> (SP_FBITS + 1 + 3)) {
		/* shunt out overflow bits
		 */
		while (xm >> (SP_FBITS + 1 + 3)) {
			SPXSRSX1();
		}
	} else {
		/* normalize in grs extended single precision
		 */
		while ((xm >> (SP_FBITS + 3)) == 0) {
			xm <<= 1;
			xe--;
		}
	}
	return ieee754sp_format(xs, xe, xm);
}
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