linux-kernel - [PATCH AUTOSEL 4.18 66/76] nds32: fix logic for module

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Date:   Mon, 24 Sep 2018 14:48:40 +0000
From:   Sasha Levin <Alexander.Levin@...rosoft.com>
To:     "stable@...r.kernel.org" <stable@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
CC:     Greentime Hu <greentime@...estech.com>,
        Sasha Levin <Alexander.Levin@...rosoft.com>
Subject: [PATCH AUTOSEL 4.18 66/76] nds32: fix logic for module

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>
---
 arch/nds32/kernel/module.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/nds32/kernel/module.c b/arch/nds32/kernel/module.c
index 4167283d8293..1e31829cbc2a 100644
--- a/arch/nds32/kernel/module.c
+++ b/arch/nds32/kernel/module.c
@@ -40,7 +40,7 @@ void do_reloc16(unsigned int val, unsigned int *loc, unsigned int val_mask,
 
 	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, unsigned int *loc, unsigned int val_mask,
 
 	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 {
-- 
2.17.1