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| author | Julian Wiedmann <jwi@linux.ibm.com> | 2020-07-30 18:01:20 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-08-19 09:15:01 +0300 |
| commit | dea13b385f6a2459b05062803ab1ed8a840ac982 (patch) | |
| tree | de77ac1e3684700a68fea58aa683501c9604ff9f /drivers | |
| parent | 62b15380d0908b71515be193bb7ae67d2e3afbcb (diff) | |
| download | linux-dea13b385f6a2459b05062803ab1ed8a840ac982.tar.xz | |
s390/qeth: don't process empty bridge port events
[ 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>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/s390/net/qeth_l2_main.c | 4 |
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 eb917e93fa72..8d30f9ac3e9d 100644 --- a/drivers/s390/net/qeth_l2_main.c +++ b/drivers/s390/net/qeth_l2_main.c @@ -1463,6 +1463,10 @@ 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; |