[PATCH] isdn: eicon: fix a missing check of api_parse

[Kangjie Lu]

api_parse can fail, and if it fails, we should not use the ss_parms
which can be incorrect.
The fix checks its return value and stops using ss_parms if api_parse
fails.

Signed-off-by: Kangjie Lu <kjlu@xxxxxxx>
---
 drivers/isdn/hardware/eicon/message.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/drivers/isdn/hardware/eicon/message.c b/drivers/isdn/hardware/eicon/message.c
index def7992a38e6..afb4a7d88288 100644
--- a/drivers/isdn/hardware/eicon/message.c
+++ b/drivers/isdn/hardware/eicon/message.c
@@ -1846,7 +1846,13 @@ static byte facility_req(dword Id, word Number, DIVA_CAPI_ADAPTER *a,
 				break;
 
 			case S_HOLD:
-				api_parse(&parms->info[1], (word)parms->length, "ws", ss_parms);
+				if (api_parse(&parms->info[1],
+							(word)parms->length,
+							"ws", ss_parms)) {
+					dbug(1, dprintf("format wrong"));
+					Info = _WRONG_MESSAGE_FORMAT;
+					break;
+				}
 				if (plci && plci->State && plci->SuppState == IDLE)
 				{
 					plci->SuppState = HOLD_REQUEST;
-- 
2.17.2 (Apple Git-113)