diff options
| author | Dan Rosenberg | 2010-09-15 11:43:28 +0000 |
|---|---|---|
| committer | David S. Miller | 2010-09-16 21:54:59 -0700 |
| commit | 7011e660938fc44ed86319c18a5954e95a82ab3e (patch) | |
| tree | ae74316fe3fe11113a1fa0bf150fc8a454143f5b /drivers/net/usb/hso.c | |
| parent | e71895a1beff2014534c9660d9ae42e043f11555 (diff) | |
drivers/net/usb/hso.c: prevent reading uninitialized memory
Fixed formatting (tabs and line breaks).
The TIOCGICOUNT device ioctl allows unprivileged users to read
uninitialized stack memory, because the "reserved" member of the
serial_icounter_struct struct declared on the stack in hso_get_count()
is not altered or zeroed before being copied back to the user. This
patch takes care of it.
Signed-off-by: Dan Rosenberg <dan.j.rosenberg@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/usb/hso.c')
| -rw-r--r-- | drivers/net/usb/hso.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/net/usb/hso.c b/drivers/net/usb/hso.c index 6efca66b8766..1cd752f9a6e1 100644 --- a/drivers/net/usb/hso.c +++ b/drivers/net/usb/hso.c @@ -1652,6 +1652,8 @@ static int hso_get_count(struct hso_serial *serial, struct uart_icount cnow; struct hso_tiocmget *tiocmget = serial->tiocmget; + memset(&icount, 0, sizeof(struct serial_icounter_struct)); + if (!tiocmget) return -ENOENT; spin_lock_irq(&serial->serial_lock); |