linux-kernel - Re: [PATCH 3/9] sound/oss/msnd_pinnacle.c: ioremap balanced with iounmap

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] [day] [month] [year] [list]

Message-Id: <1160197777.19143.157.camel@amol.verismonetworks.com>
Date:	Sat, 07 Oct 2006 10:39:37 +0530
From:	Amol Lad <amol@...ismonetworks.com>
To:	Andrew Morton <akpm@...l.org>
Cc:	linux kernel <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 3/9] sound/oss/msnd_pinnacle.c: ioremap balanced with
	iounmap

On Fri, 2006-10-06 at 16:03 -0700, Andrew Morton wrote:
> On Fri, 06 Oct 2006 11:08:57 +0530
> Amol Lad <amol@...ismonetworks.com> wrote:
> 
> >  msnd_pinnacle.c |   10 ++++++++++
> 
> This driver fails to check that ioremap() actually succeeded.  Hence with
> this patch we can end up doing iounmap(NULL).
> 
Is this better ?

Signed-off-by: Amol Lad <amol@...ismonetworks.com>
---
 msnd_pinnacle.c |   30 +++++++++++++++++++++---------
 1 files changed, 21 insertions(+), 9 deletions(-)
---
diff -uprN -X linux-2.6.19-rc1-orig/Documentation/dontdiff linux-2.6.19-rc1-orig/sound/oss/msnd_pinnacle.c linux-2.6.19-rc1/sound/oss/msnd_pinnacle.c
--- linux-2.6.19-rc1-orig/sound/oss/msnd_pinnacle.c	2006-09-21 10:15:52.000000000 +0530
+++ linux-2.6.19-rc1/sound/oss/msnd_pinnacle.c	2006-10-07 10:28:31.000000000 +0530
@@ -1441,6 +1441,10 @@ static int __init attach_multisound(void
 
 static void __exit unload_multisound(void)
 {
+	if (dev.base) {
+		iounmap(dev.base);
+		dev.base = NULL;
+	}
 	release_region(dev.io, dev.numio);
 	free_irq(dev.irq, &dev);
 	unregister_sound_mixer(dev.mixer_minor);
@@ -1884,30 +1888,38 @@ static int __init msnd_init(void)
 	printk(KERN_INFO LOGNAME ": %u byte audio FIFOs (x2)\n", dev.fifosize);
 	if ((err = msnd_fifo_alloc(&dev.DAPF, dev.fifosize)) < 0) {
 		printk(KERN_ERR LOGNAME ": Couldn't allocate write FIFO\n");
-		return err;
+		goto fail1;
 	}
 
 	if ((err = msnd_fifo_alloc(&dev.DARF, dev.fifosize)) < 0) {
 		printk(KERN_ERR LOGNAME ": Couldn't allocate read FIFO\n");
-		msnd_fifo_free(&dev.DAPF);
-		return err;
+		goto fail2;
 	}
 
 	if ((err = probe_multisound()) < 0) {
 		printk(KERN_ERR LOGNAME ": Probe failed\n");
-		msnd_fifo_free(&dev.DAPF);
-		msnd_fifo_free(&dev.DARF);
-		return err;
+		goto fail3;
 	}
 
 	if ((err = attach_multisound()) < 0) {
 		printk(KERN_ERR LOGNAME ": Attach failed\n");
-		msnd_fifo_free(&dev.DAPF);
-		msnd_fifo_free(&dev.DARF);
-		return err;
+		goto fail3;
 	}
 
 	return 0;
+
+fail3:
+	msnd_fifo_free(&dev.DARF);
+fail2:
+	msnd_fifo_free(&dev.DAPF);
+fail1:
+	if (dev.base) {
+		iounmap(dev.base);
+		dev.base = NULL;
+	}
+
+	return err;
+	
 }
 
 static void __exit msdn_cleanup(void)


-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/