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s390/qeth: don't dump past end of unknown HW header

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[ Upstream commit 0ac1487c4b2de383b91ecad1be561b8f7a2c15f4 ]

For inbound data with an unsupported HW header format, only dump the
actual HW header. We have no idea how much payload follows it, and what
it contains. Worst case, we dump past the end of the Inbound Buffer and
access whatever is located next in memory.

Signed-off-by: Julian Wiedmann <jwi@linux.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Julian Wiedmann 2018-09-12 15:31:35 +02:00 • committed by Greg Kroah-Hartman
parent 02975ee737
commit e12134726a
2 changed files with 2 additions and 2 deletions
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2
drivers/s390/net/qeth_l2_main.c
View file

@ -523,7 +523,7 @@ static int qeth_l2_process_inbound_buffer(struct qeth_card *card,
default:
dev_kfree_skb_any(skb);
QETH_CARD_TEXT(card, 3, "inbunkno");
QETH_DBF_HEX(CTRL, 3, hdr, QETH_DBF_CTRL_LEN);
QETH_DBF_HEX(CTRL, 3, hdr, sizeof(*hdr));
continue;
}
work_done++;

2
drivers/s390/net/qeth_l3_main.c
View file

@ -1902,7 +1902,7 @@ static int qeth_l3_process_inbound_buffer(struct qeth_card *card,
default:
dev_kfree_skb_any(skb);
QETH_CARD_TEXT(card, 3, "inbunkno");
QETH_DBF_HEX(CTRL, 3, hdr, QETH_DBF_CTRL_LEN);
QETH_DBF_HEX(CTRL, 3, hdr, sizeof(*hdr));
continue;
}
work_done++;