From: Hao Chen chenhao288@hisilicon.com
mainline inclusion from mainline-net-5.17 commit a89cbb16995b category: bugfix bugzilla: https://gitee.com/openeuler/kernel/issues/I4YXIM CVE: NA
Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?i...
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Add max order judgement for tx spare buffer to avoid triggering call trace, print related fail information instead, when user set tx spare buf size to a large value which causes order exceeding 10.
Fixes: e445f08af2b1 ("net: hns3: add support to set/get tx copybreak buf size via ethtool for hns3 driver") Signed-off-by: Hao Chen chenhao288@hisilicon.com Signed-off-by: Guangbin Huang huangguangbin2@huawei.com Signed-off-by: David S. Miller davem@davemloft.net Reviewed-by: Yue Haibing yuehaibing@huawei.com Acked-by: Xie XiuQi xiexiuqi@huawei.com Signed-off-by: Zheng Zengkai zhengzengkai@huawei.com --- drivers/net/ethernet/hisilicon/hns3/hns3_enet.c | 6 ++++++ 1 file changed, 6 insertions(+)
diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c b/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c index ffdda90a30a7..d7be9291def1 100644 --- a/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c +++ b/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c @@ -1037,6 +1037,12 @@ static void hns3_init_tx_spare_buffer(struct hns3_enet_ring *ring) return;
order = get_order(alloc_size); + if (order >= MAX_ORDER) { + if (net_ratelimit()) + dev_warn(ring_to_dev(ring), "failed to allocate tx spare buffer, exceed to max order\n"); + return; + } + tx_spare = devm_kzalloc(ring_to_dev(ring), sizeof(*tx_spare), GFP_KERNEL); if (!tx_spare) {