65 lines
2.1 KiB
Diff
65 lines
2.1 KiB
Diff
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From 9e3f4aa0a83ea0ff9512678e3932e611186d573e Mon Sep 17 00:00:00 2001
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From: Chengchang Tang <tangchengchang@huawei.com>
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Date: Mon, 27 Nov 2023 16:39:50 +0800
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Subject: [PATCH 74/75] libhns: Fix possible overflow in cq clean
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driver inclusion
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category: bugfix
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bugzilla: https://gitee.com/src-openeuler/rdma-core/issues/I8J2XP?from=project-issue
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--------------------------------------------------------------------------
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The ci/pi of hns roce cq allows data to be flipped. but in
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__hns_roce_v2_cq_clean(), this flip may lead to an wrong number
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of loops.
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This patch fixes it by extending the data type to avoid data
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flipping.
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Signed-off-by: Chengchang Tang <tangchengchang@huawei.com>
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---
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providers/hns/hns_roce_u_hw_v2.c | 25 +++++++++++++------------
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1 file changed, 13 insertions(+), 12 deletions(-)
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diff --git a/providers/hns/hns_roce_u_hw_v2.c b/providers/hns/hns_roce_u_hw_v2.c
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index b48cabd..fc938de 100644
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--- a/providers/hns/hns_roce_u_hw_v2.c
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+++ b/providers/hns/hns_roce_u_hw_v2.c
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@@ -1847,20 +1847,21 @@ out:
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static void __hns_roce_v2_cq_clean(struct hns_roce_cq *cq, uint32_t qpn,
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struct hns_roce_srq *srq)
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{
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- int nfreed = 0;
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- bool is_recv_cqe;
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- uint8_t owner_bit;
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- uint16_t wqe_index;
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- uint32_t prod_index;
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- struct hns_roce_v2_cqe *cqe, *dest;
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- struct hns_roce_context *ctx = to_hr_ctx(cq->verbs_cq.cq.context);
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-
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- for (prod_index = cq->cons_index; get_sw_cqe_v2(cq, prod_index);
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- ++prod_index)
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- if (prod_index > cq->cons_index + cq->verbs_cq.cq.cqe)
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+ struct hns_roce_context *ctx = to_hr_ctx(cq->verbs_cq.cq.context);
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+ uint64_t cons_index = cq->cons_index;
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+ uint64_t prod_index = cq->cons_index;
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+ struct hns_roce_v2_cqe *cqe, *dest;
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+ uint16_t wqe_index;
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+ uint8_t owner_bit;
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+ bool is_recv_cqe;
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+ int nfreed = 0;
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+
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+ for (; get_sw_cqe_v2(cq, prod_index); ++prod_index)
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+ if (prod_index > cons_index + cq->verbs_cq.cq.cqe)
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break;
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- while ((int) --prod_index - (int) cq->cons_index >= 0) {
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+ while (prod_index - cons_index > 0) {
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+ prod_index--;
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cqe = get_cqe_v2(cq, prod_index & cq->verbs_cq.cq.cqe);
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if (hr_reg_read(cqe, CQE_LCL_QPN) == qpn) {
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is_recv_cqe = hr_reg_read(cqe, CQE_S_R);
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--
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2.25.1
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