From: Mauro Carvalho Chehab Date: Tue, 28 Apr 2015 21:34:40 +0000 (-0300) Subject: [media] s5h1420: fix a buffer overflow when checking userspace params X-Git-Tag: firefly_0821_release~176^2~795^2~959 X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=12f4543f5d6811f864e6c4952eb27253c7466c02;p=firefly-linux-kernel-4.4.55.git [media] s5h1420: fix a buffer overflow when checking userspace params The maximum size for a DiSEqC command is 6, according to the userspace API. However, the code allows to write up to 7 values: drivers/media/dvb-frontends/s5h1420.c:193 s5h1420_send_master_cmd() error: buffer overflow 'cmd->msg' 6 <= 7 Cc: stable@vger.kernel.org Signed-off-by: Mauro Carvalho Chehab --- diff --git a/drivers/media/dvb-frontends/s5h1420.c b/drivers/media/dvb-frontends/s5h1420.c index 93eeaf7118fd..0b4f8fe6bf99 100644 --- a/drivers/media/dvb-frontends/s5h1420.c +++ b/drivers/media/dvb-frontends/s5h1420.c @@ -180,7 +180,7 @@ static int s5h1420_send_master_cmd (struct dvb_frontend* fe, int result = 0; dprintk("enter %s\n", __func__); - if (cmd->msg_len > 8) + if (cmd->msg_len > sizeof(cmd->msg)) return -EINVAL; /* setup for DISEQC */