linux-kernel - [PATCH 4.18 066/168] nds32: fix logic for module

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Date:   Mon,  8 Oct 2018 20:30:46 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Dan Carpenter <dan.carpenter@...cle.com>,
        Greentime Hu <greentime@...estech.com>,
        Sasha Levin <alexander.levin@...rosoft.com>
Subject: [PATCH 4.18 066/168] nds32: fix logic for module

4.18-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Greentime Hu <greentime@...estech.com>

[ Upstream commit 1dfdf99106668679b0de5a62fd4f42c1a11c9445 ]

This bug is report by Dan Carpenter. We shall use ~loc_mask instead of
!loc_mask because we need to and(&) the bits of ~loc_mask.

Reported-by: Dan Carpenter <dan.carpenter@...cle.com>
Fixes: c9a4a8da6baa ("nds32: Loadable modules")
Signed-off-by: Greentime Hu <greentime@...estech.com>
Signed-off-by: Sasha Levin <alexander.levin@...rosoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 arch/nds32/kernel/module.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

--- a/arch/nds32/kernel/module.c
+++ b/arch/nds32/kernel/module.c
@@ -40,7 +40,7 @@ void do_reloc16(unsigned int val, unsign
 
 	tmp2 = tmp & loc_mask;
 	if (partial_in_place) {
-		tmp &= (!loc_mask);
+		tmp &= (~loc_mask);
 		tmp =
 		    tmp2 | ((tmp + ((val & val_mask) >> val_shift)) & val_mask);
 	} else {
@@ -70,7 +70,7 @@ void do_reloc32(unsigned int val, unsign
 
 	tmp2 = tmp & loc_mask;
 	if (partial_in_place) {
-		tmp &= (!loc_mask);
+		tmp &= (~loc_mask);
 		tmp =
 		    tmp2 | ((tmp + ((val & val_mask) >> val_shift)) & val_mask);
 	} else {