Commit 02472e28 authored Jul 30, 2020 by Julian Wiedmann Committed by David S. Miller Jul 31, 2020

s390/qeth: don't process empty bridge port events



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: b4d72c08 ("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>

parent 7c94a882

drivers/s390/net/qeth_l2_main.c

+4 −0

Original line number	Diff line number	Diff line
		@@ -1140,6 +1140,10 @@ 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;

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