linux-kernel - [PATCH 5.15 172/279] ptp: ocp: Fix a couple NULL vs IS

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20211124115724.679685074@linuxfoundation.org>
Date:   Wed, 24 Nov 2021 12:57:39 +0100
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>,
        "David S. Miller" <davem@...emloft.net>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.15 172/279] ptp: ocp: Fix a couple NULL vs IS_ERR() checks

From: Dan Carpenter <dan.carpenter@...cle.com>

[ Upstream commit c7521d3aa2fa7fc785682758c99b5bcae503f6be ]

The ptp_ocp_get_mem() function does not return NULL, it returns error
pointers.

Fixes: 773bda964921 ("ptp: ocp: Expose various resources on the timecard.")
Signed-off-by: Dan Carpenter <dan.carpenter@...cle.com>
Signed-off-by: David S. Miller <davem@...emloft.net>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/ptp/ptp_ocp.c | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

diff --git a/drivers/ptp/ptp_ocp.c b/drivers/ptp/ptp_ocp.c
index caf9b37c5eb1e..e238ae8e94709 100644
--- a/drivers/ptp/ptp_ocp.c
+++ b/drivers/ptp/ptp_ocp.c
@@ -1049,10 +1049,11 @@ ptp_ocp_register_ext(struct ptp_ocp *bp, struct ocp_resource *r)
 	if (!ext)
 		return -ENOMEM;
 
-	err = -EINVAL;
 	ext->mem = ptp_ocp_get_mem(bp, r);
-	if (!ext->mem)
+	if (IS_ERR(ext->mem)) {
+		err = PTR_ERR(ext->mem);
 		goto out;
+	}
 
 	ext->bp = bp;
 	ext->info = r->extra;
@@ -1122,8 +1123,8 @@ ptp_ocp_register_mem(struct ptp_ocp *bp, struct ocp_resource *r)
 	void __iomem *mem;
 
 	mem = ptp_ocp_get_mem(bp, r);
-	if (!mem)
-		return -EINVAL;
+	if (IS_ERR(mem))
+		return PTR_ERR(mem);
 
 	bp_assign_entry(bp, r, mem);
 
-- 
2.33.0