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authorTilman Schmidt <tilman@imap.cc>2014-10-11 15:46:29 +0400
committerDavid S. Miller <davem@davemloft.net>2014-10-14 23:05:33 +0400
commit846ac30135e7c5e03b487c16c87ccb1ab020a01f (patch)
treed05a50ab4e0fadc1d119656b68c9cff0cbc307f4 /drivers/isdn/gigaset/ev-layer.c
parent097933ddcd28ef99c116651b20fd2e06717e0f0d (diff)
downloadlinux-846ac30135e7c5e03b487c16c87ccb1ab020a01f.tar.xz
isdn/gigaset: fix NULL pointer dereference
In do_action, a NULL pointer might be passed to function start_dial which will dereference it. Fix by adding a check for NULL before the call. Spotted with Coverity. Signed-off-by: Tilman Schmidt <tilman@imap.cc> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/isdn/gigaset/ev-layer.c')
-rw-r--r--drivers/isdn/gigaset/ev-layer.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/isdn/gigaset/ev-layer.c b/drivers/isdn/gigaset/ev-layer.c
index dcae14aef376..0f699ebd81c5 100644
--- a/drivers/isdn/gigaset/ev-layer.c
+++ b/drivers/isdn/gigaset/ev-layer.c
@@ -1380,6 +1380,11 @@ static void do_action(int action, struct cardstate *cs,
/* events from the LL */
case ACT_DIAL:
+ if (!ev->ptr) {
+ *p_genresp = 1;
+ *p_resp_code = RSP_ERROR;
+ break;
+ }
start_dial(at_state, ev->ptr, ev->parameter);
break;
case ACT_ACCEPT: