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authorJulian Wiedmann <jwi@linux.ibm.com>2020-07-30 17:01:20 +0200
committerDavid S. Miller <davem@davemloft.net>2020-07-31 16:44:36 -0700
commit02472e28b9a45471c6d8729ff2c7422baa9be46a (patch)
tree572dcf196182b265b285a63fb0fc54192ae5a201 /drivers/s390
parent7c94a88295008f66e9a0efc1c15d8511f73a0366 (diff)
downloadlinux-02472e28b9a45471c6d8729ff2c7422baa9be46a.tar.bz2
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: 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>
Diffstat (limited to 'drivers/s390')
-rw-r--r--drivers/s390/net/qeth_l2_main.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/s390/net/qeth_l2_main.c b/drivers/s390/net/qeth_l2_main.c
index 38e97bbde9ed..8b342a88ff5c 100644
--- a/drivers/s390/net/qeth_l2_main.c
+++ b/drivers/s390/net/qeth_l2_main.c
@@ -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;