diff options
author | Dan Carpenter <dan.carpenter@oracle.com> | 2013-10-29 22:07:47 +0300 |
---|---|---|
committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-11-13 12:08:09 +0900 |
commit | 0622771fb23e520ce667ef7d9ed2670ec2223897 (patch) | |
tree | 1f05fbcaa371c71cf15b95b512e9bdb6a20d2402 /drivers/staging | |
parent | 6de317283eb18f5f766305fb7770ebc9760994e8 (diff) |
staging: ozwpan: prevent overflow in oz_cdev_write()
commit c2c65cd2e14ada6de44cb527e7f1990bede24e15 upstream.
We need to check "count" so we don't overflow the ei->data buffer.
Reported-by: Nico Golde <nico@ngolde.de>
Reported-by: Fabian Yamaguchi <fabs@goesec.de>
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/staging')
-rw-r--r-- | drivers/staging/ozwpan/ozcdev.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/staging/ozwpan/ozcdev.c b/drivers/staging/ozwpan/ozcdev.c index 374fdc39864..ea5f9f3595f 100644 --- a/drivers/staging/ozwpan/ozcdev.c +++ b/drivers/staging/ozwpan/ozcdev.c @@ -152,6 +152,9 @@ static ssize_t oz_cdev_write(struct file *filp, const char __user *buf, struct oz_app_hdr *app_hdr; struct oz_serial_ctx *ctx; + if (count > sizeof(ei->data) - sizeof(*elt) - sizeof(*app_hdr)) + return -EINVAL; + spin_lock_bh(&g_cdev.lock); pd = g_cdev.active_pd; if (pd) |