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| author | Julia Lawall <julia@diku.dk> | 2010-05-27 16:32:09 +0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2010-06-05 00:16:19 +0400 |
| commit | 109f34e71b9049a57f6cdf3f1da6bee2b722b259 (patch) | |
| tree | fc81ea178fc4a885fecc476aaf47089923f2eeb8 /drivers/usb | |
| parent | 1f23b2d98c11fed43c552a5dbd00c793f81a8736 (diff) | |
| download | linux-109f34e71b9049a57f6cdf3f1da6bee2b722b259.tar.xz | |
USB: serial: digi_acceleport: Eliminate a NULL pointer dereference
If port is NULL, then the call to dev_err will dereference a value that is
a small offset from NULL.
A simplified version of the semantic match that finds this problem is as
follows: (http://coccinelle.lip6.fr/)
// <smpl>
@r exists@
expression E,E1;
identifier f;
statement S1,S2,S3;
@@
if ((E == NULL && ...) || ...)
{
... when != if (...) S1 else S2
when != E = E1
* E->f
... when any
return ...;
}
else S3
// </smpl>
Signed-off-by: Julia Lawall <julia@diku.dk>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/usb')
| -rw-r--r-- | drivers/usb/serial/digi_acceleport.c | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/drivers/usb/serial/digi_acceleport.c b/drivers/usb/serial/digi_acceleport.c index 3edda3ed822a..fd35f73b5721 100644 --- a/drivers/usb/serial/digi_acceleport.c +++ b/drivers/usb/serial/digi_acceleport.c @@ -1239,8 +1239,7 @@ static void digi_write_bulk_callback(struct urb *urb) /* port and serial sanity check */ if (port == NULL || (priv = usb_get_serial_port_data(port)) == NULL) { - dev_err(&port->dev, - "%s: port or port->private is NULL, status=%d\n", + pr_err("%s: port or port->private is NULL, status=%d\n", __func__, status); return; } |