forked from Minki/linux
nvme-rdma: Fix a use after free in nvmet_rdma_write_data_done
In nvmet_rdma_write_data_done, rsp is recoverd by wc->wr_cqe and freed by nvmet_rdma_release_rsp(). But after that, pr_info() used the freed chunk's member object and could leak the freed chunk address with wc->wr_cqe by computing the offset. Signed-off-by: Lv Yunlong <lyl2019@mail.ustc.edu.cn> Signed-off-by: Christoph Hellwig <hch@lst.de>
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@ -802,9 +802,8 @@ static void nvmet_rdma_write_data_done(struct ib_cq *cq, struct ib_wc *wc)
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nvmet_req_uninit(&rsp->req);
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nvmet_req_uninit(&rsp->req);
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nvmet_rdma_release_rsp(rsp);
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nvmet_rdma_release_rsp(rsp);
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if (wc->status != IB_WC_WR_FLUSH_ERR) {
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if (wc->status != IB_WC_WR_FLUSH_ERR) {
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pr_info("RDMA WRITE for CQE 0x%p failed with status %s (%d).\n",
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pr_info("RDMA WRITE for CQE failed with status %s (%d).\n",
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wc->wr_cqe, ib_wc_status_msg(wc->status),
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ib_wc_status_msg(wc->status), wc->status);
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wc->status);
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nvmet_rdma_error_comp(queue);
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nvmet_rdma_error_comp(queue);
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}
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}
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return;
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return;
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