From 41c6e9dd0915741051e813cafa14f2e7f88b71d9 Mon Sep 17 00:00:00 2001 From: Mauro Carvalho Chehab Date: Sun, 7 Apr 2013 20:51:32 -0300 Subject: [PATCH] [media] mb86a20s: fix audio sub-channel check As reported by Dan Carpenter FYI, there are new smatch warnings show up in: tree: git://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next master head: da17d7bda957ae4697b6abc0793f74fb9b50b58f commit: 04fa725e7b1c22c583dd71a8cd85b8d997edfce3 [media] mb86a20s: Implement set_frontend cache logic New smatch warnings: drivers/media/dvb-frontends/mb86a20s.c:1897 mb86a20s_set_frontend() error: buffer overflow 'mb86a20s_subchannel' 8 <= 8 04fa725e Mauro Carvalho Chehab 2013-03-04 1894 if (c->isdbt_sb_subchannel > ARRAY_SIZE(mb86a20s_subchannel)) 04fa725e Mauro Carvalho Chehab 2013-03-04 1895 c->isdbt_sb_subchannel = 0; 04fa725e Mauro Carvalho Chehab 2013-03-04 1896 04fa725e Mauro Carvalho Chehab 2013-03-04 @1897 state->subchannel = mb86a20s_subchannel[c->isdbt_sb_subchannel]; Reported-by: Dan Carpenter Signed-off-by: Mauro Carvalho Chehab Signed-off-by: Michael Krufky Signed-off-by: Mauro Carvalho Chehab --- drivers/media/dvb-frontends/mb86a20s.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/media/dvb-frontends/mb86a20s.c b/drivers/media/dvb-frontends/mb86a20s.c index 80a8ee090c80..70158aae1886 100644 --- a/drivers/media/dvb-frontends/mb86a20s.c +++ b/drivers/media/dvb-frontends/mb86a20s.c @@ -1915,7 +1915,7 @@ static int mb86a20s_set_frontend(struct dvb_frontend *fe) if (!c->isdbt_sb_mode) { state->subchannel = 0; } else { - if (c->isdbt_sb_subchannel > ARRAY_SIZE(mb86a20s_subchannel)) + if (c->isdbt_sb_subchannel >= ARRAY_SIZE(mb86a20s_subchannel)) c->isdbt_sb_subchannel = 0; state->subchannel = mb86a20s_subchannel[c->isdbt_sb_subchannel]; -- 2.20.1