From: Julian Wiedmann jwi@linux.ibm.com
[ Upstream commit 02472e28b9a45471c6d8729ff2c7422baa9be46a ]
Discard events that don't contain any entries. This shouldn't happen, but subsequent code relies on being able to use entry 0. So better be safe than accessing garbage.
Fixes: b4d72c08b358 ("qeth: bridgeport support - basic control") Signed-off-by: Julian Wiedmann jwi@linux.ibm.com Reviewed-by: Alexandra Winter wintera@linux.ibm.com Signed-off-by: David S. Miller davem@davemloft.net Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/s390/net/qeth_l2_main.c | 4 ++++ 1 file changed, 4 insertions(+)
diff --git a/drivers/s390/net/qeth_l2_main.c b/drivers/s390/net/qeth_l2_main.c index 6fa07c2469150..ae310d5ced105 100644 --- a/drivers/s390/net/qeth_l2_main.c +++ b/drivers/s390/net/qeth_l2_main.c @@ -1559,6 +1559,10 @@ static void qeth_bridge_state_change(struct qeth_card *card, int extrasize;
QETH_CARD_TEXT(card, 2, "brstchng"); + if (qports->num_entries == 0) { + QETH_CARD_TEXT(card, 2, "BPempty"); + return; + } if (qports->entry_length != sizeof(struct qeth_sbp_port_entry)) { QETH_CARD_TEXT_(card, 2, "BPsz%04x", qports->entry_length); return;