From e95051ff5a0b76e672f6d30e8bb8f93cc11c8018 Mon Sep 17 00:00:00 2001 From: Rickard Strandqvist Date: Wed, 28 May 2014 10:22:30 +0200 Subject: qeth: Fix for possible null pointer dereference There is otherwise a risk of a possible null pointer dereference. Was largely found by using a static code analysis program called cppcheck. Signed-off-by: Rickard Strandqvist Signed-off-by: Frank Blaschka Signed-off-by: David S. Miller --- drivers/s390/net/qeth_core_main.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'drivers/s390/net') diff --git a/drivers/s390/net/qeth_core_main.c b/drivers/s390/net/qeth_core_main.c index 34993009a9e1..549e9fd5bfdc 100644 --- a/drivers/s390/net/qeth_core_main.c +++ b/drivers/s390/net/qeth_core_main.c @@ -1013,7 +1013,7 @@ static long __qeth_check_irb_error(struct ccw_device *cdev, card = CARD_FROM_CDEV(cdev); - if (!IS_ERR(irb)) + if (!card || !IS_ERR(irb)) return 0; switch (PTR_ERR(irb)) { @@ -1029,7 +1029,7 @@ static long __qeth_check_irb_error(struct ccw_device *cdev, QETH_CARD_TEXT(card, 2, "ckirberr"); QETH_CARD_TEXT_(card, 2, " rc%d", -ETIMEDOUT); if (intparm == QETH_RCD_PARM) { - if (card && (card->data.ccwdev == cdev)) { + if (card->data.ccwdev == cdev) { card->data.state = CH_STATE_DOWN; wake_up(&card->wait_q); } -- cgit v1.2.3