linux-kernel - [PATCH v3] firmware: Fix an 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>] [day] [month] [year] [list]

Message-Id: <20230717061517.17072-1-machel@vivo.com>
Date:   Mon, 17 Jul 2023 14:15:04 +0800
From:   Wang Ming <machel@...o.com>
To:     Dinh Nguyen <dinguyen@...nel.org>, Alan Tull <atull@...nel.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Richard Gong <richard.gong@...el.com>,
        linux-kernel@...r.kernel.org
Cc:     opensource.kernel@...o.com, Wang Ming <machel@...o.com>
Subject: [PATCH v3] firmware: Fix an NULL vs IS_ERR() bug in probe

The devm_memremap() function returns error pointers.
It never returns NULL. Fix the check.

Fixes: 7ca5ce896524 ("firmware: add Intel Stratix10 service layer driver")
Signed-off-by: Wang Ming <machel@...o.com>
---
 drivers/firmware/stratix10-svc.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/firmware/stratix10-svc.c b/drivers/firmware/stratix10-svc.c
index 2d674126160f..cab11af28c23 100644
--- a/drivers/firmware/stratix10-svc.c
+++ b/drivers/firmware/stratix10-svc.c
@@ -756,7 +756,7 @@ svc_create_memory_pool(struct platform_device *pdev,
 	paddr = begin;
 	size = end - begin;
 	va = devm_memremap(dev, paddr, size, MEMREMAP_WC);
-	if (!va) {
+	if (IS_ERR(va)) {
 		dev_err(dev, "fail to remap shared memory\n");
 		return ERR_PTR(-EINVAL);
 	}
-- 
2.25.1