From: Julian Wiedmann Date: Thu, 20 Feb 2020 15:54:56 +0100 Subject: s390/qeth: fix off-by-one in RX copybreak check Git-commit: 54a61fbc020fd2e305680871c453abcf7fc0339b Patch-mainline: v5.6-rc3 References: git-fixes The RX copybreak is intended as the _max_ value where the frame's data should be copied. So for frame_len == copybreak, don't build an SG skb. Fixes: 4a71df50047f ("qeth: new qeth device driver") Signed-off-by: Julian Wiedmann Signed-off-by: David S. Miller Acked-by: Petr Tesarik --- drivers/s390/net/qeth_core_main.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/drivers/s390/net/qeth_core_main.c +++ b/drivers/s390/net/qeth_core_main.c @@ -5301,7 +5301,7 @@ struct sk_buff *qeth_core_get_next_skb(s return NULL; } - if (((skb_len >= card->options.rx_sg_cb) && + if (((skb_len > card->options.rx_sg_cb) && (!(card->info.type == QETH_CARD_TYPE_OSN)) && (!atomic_read(&card->force_alloc_skb))) || (card->options.cq == QETH_CQ_ENABLED))