netdev - [PATCH 5/20 V2] drivers/net/ethernet/sis/sis900.c: fix error return code

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: <1349469667-6137-5-git-send-email-peter.senna@gmail.com>
Date:	Fri,  5 Oct 2012 22:41:07 +0200
From:	Peter Senna Tschudin <peter.senna@...il.com>
To:	venza@...wnhat.org
Cc:	netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
	kernel-janitors@...r.kernel.org,
	Peter Senna Tschudin <peter.senna@...il.com>
Subject: [PATCH 5/20 V2] drivers/net/ethernet/sis/sis900.c: fix error return code

From: Peter Senna Tschudin <peter.senna@...il.com>

The function sis900_probe() return 0 for success and negative value
for most of its internal tests failures. There is one exception
that is error case going to err_out_cleardev:. Fore this error case,
the function abort its success execution path, but returns non negative
value, making it difficult for a caller function to notice the error.

This patch fixes the error case that do not return negative value.

This was found by Coccinelle, but the code change was made by hand.
This patch is not robot generated.

A simplified version of the semantic match that finds this problem is
as follows: (http://coccinelle.lip6.fr/)

// <smpl>
(
if@p1 (\(ret < 0\|ret != 0\))
 { ... return ret; }
|
ret@p1 = 0
)
... when != ret = e1
    when != &ret
*if(...)
{
  ... when != ret = e2
      when forall
 return ret;
}
// </smpl>

Signed-off-by: Peter Senna Tschudin <peter.senna@...il.com>

---
Change from V1:
        Updated commit message. See:
        http://www.kernelhub.org/?p=2&msg=139319

 drivers/net/ethernet/sis/sis900.c |    4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/sis/sis900.c b/drivers/net/ethernet/sis/sis900.c
index 203d9c6..fb9f6b3 100644
--- a/drivers/net/ethernet/sis/sis900.c
+++ b/drivers/net/ethernet/sis/sis900.c
@@ -478,8 +478,10 @@ static int __devinit sis900_probe(struct pci_dev *pci_dev,
 
 	/* IO region. */
 	ioaddr = pci_iomap(pci_dev, 0, 0);
-	if (!ioaddr)
+	if (!ioaddr) {
+		ret = -ENOMEM;
 		goto err_out_cleardev;
+	}
 
 	sis_priv = netdev_priv(net_dev);
 	sis_priv->ioaddr = ioaddr;

--
To unsubscribe from this list: send the line "unsubscribe netdev" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html