diff options
| author | Mauro Carvalho Chehab <mchehab@s-opensource.com> | 2016-10-07 20:12:48 +0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@s-opensource.com> | 2016-10-14 18:45:25 +0300 |
| commit | f1a503dddf4d4da2b7bbf6ae4e92527bdc265bb9 (patch) | |
| tree | 66c132ca66a00c29bc847aac12ba34b081bb92d8 /drivers/media | |
| parent | fa86c9a1fca5a50563cc63e97aa130a3c54f1d4c (diff) | |
| download | linux-f1a503dddf4d4da2b7bbf6ae4e92527bdc265bb9.tar.xz | |
[media] gp8psk: don't go past the buffer size
Add checks to avoid going out of the buffer.
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Diffstat (limited to 'drivers/media')
| -rw-r--r-- | drivers/media/usb/dvb-usb/gp8psk.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/drivers/media/usb/dvb-usb/gp8psk.c b/drivers/media/usb/dvb-usb/gp8psk.c index 807f5628a3bb..adfd76491451 100644 --- a/drivers/media/usb/dvb-usb/gp8psk.c +++ b/drivers/media/usb/dvb-usb/gp8psk.c @@ -60,6 +60,9 @@ int gp8psk_usb_in_op(struct dvb_usb_device *d, u8 req, u16 value, u16 index, u8 struct gp8psk_state *st = d->priv; int ret = 0,try = 0; + if (blen > sizeof(st->data)) + return -EIO; + if ((ret = mutex_lock_interruptible(&d->usb_mutex))) return ret; @@ -98,6 +101,9 @@ int gp8psk_usb_out_op(struct dvb_usb_device *d, u8 req, u16 value, deb_xfer("out: req. %x, val: %x, ind: %x, buffer: ",req,value,index); debug_dump(b,blen,deb_xfer); + if (blen > sizeof(st->data)) + return -EIO; + if ((ret = mutex_lock_interruptible(&d->usb_mutex))) return ret; @@ -151,6 +157,11 @@ static int gp8psk_load_bcm4500fw(struct dvb_usb_device *d) err("failed to load bcm4500 firmware."); goto out_free; } + if (buflen > 64) { + err("firmare chunk size bigger than 64 bytes."); + goto out_free; + } + memcpy(buf, ptr, buflen); if (dvb_usb_generic_write(d, buf, buflen)) { err("failed to load bcm4500 firmware."); |