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authorMauro Carvalho Chehab <mchehab@s-opensource.com>2016-10-07 20:12:48 +0300
committerMauro Carvalho Chehab <mchehab@s-opensource.com>2016-10-14 18:45:25 +0300
commitf1a503dddf4d4da2b7bbf6ae4e92527bdc265bb9 (patch)
tree66c132ca66a00c29bc847aac12ba34b081bb92d8 /drivers/media
parentfa86c9a1fca5a50563cc63e97aa130a3c54f1d4c (diff)
downloadlinux-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.c11
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.");