lkml.org 
[lkml]   [2006]   [Mar]   [16]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
Date
From
SubjectRe: [PATCH] Hamradio: Fix a NULL pointer dereference in net/hamradio/mkiss.c
<quote sender="Eugene Teo">
> Pointer ax is dereferenced before NULL check.
>
> Coverity bug #817
>
> Signed-off-by: Eugene Teo <eugene.teo@eugeneteo.net>

Ignore the previous patch please. Here's a resend.

--
Pointer ax is dereferenced before NULL check.

Coverity bug #817

Signed-off-by: Eugene Teo <eugene.teo@eugeneteo.net>

--- linux-2.6/drivers/net/hamradio/mkiss.c~ 2006-03-15 10:05:35.000000000 +0800
+++ linux-2.6/drivers/net/hamradio/mkiss.c 2006-03-16 15:06:02.000000000 +0800
@@ -845,13 +845,15 @@ static int mkiss_ioctl(struct tty_struct
unsigned int cmd, unsigned long arg)
{
struct mkiss *ax = mkiss_get(tty);
- struct net_device *dev = ax->dev;
+ struct net_device *dev;
unsigned int tmp, err;

/* First make sure we're connected. */
if (ax == NULL)
return -ENXIO;

+ dev = ax->dev;
+
switch (cmd) {
case SIOCGIFNAME:
err = copy_to_user((void __user *) arg, ax->dev->name,
--
1024D/A6D12F80 print D51D 2633 8DAC 04DB 7265 9BB8 5883 6DAA A6D1 2F80
main(i) { putchar(182623909 >> (i-1) * 5&31|!!(i<7)<<6) && main(++i); }
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2006-03-16 08:10    [W:0.043 / U:0.248 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site