From: Lv Yunlong Date: Thu, 11 Mar 2021 05:44:13 +0000 (-0800) Subject: nvme-rdma: Fix a use after free in nvmet_rdma_write_data_done X-Git-Tag: v5.15~1554^2~1^2~1 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=abec6561fc4e0fbb19591a0b35676d8c783b5493;p=platform%2Fkernel%2Flinux-starfive.git 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 Signed-off-by: Christoph Hellwig --- diff --git a/drivers/nvme/target/rdma.c b/drivers/nvme/target/rdma.c index 06b6b742bb21..6c1f3ab7649c 100644 --- a/drivers/nvme/target/rdma.c +++ b/drivers/nvme/target/rdma.c @@ -802,9 +802,8 @@ static void nvmet_rdma_write_data_done(struct ib_cq *cq, struct ib_wc *wc) nvmet_req_uninit(&rsp->req); nvmet_rdma_release_rsp(rsp); if (wc->status != IB_WC_WR_FLUSH_ERR) { - pr_info("RDMA WRITE for CQE 0x%p failed with status %s (%d).\n", - wc->wr_cqe, ib_wc_status_msg(wc->status), - wc->status); + pr_info("RDMA WRITE for CQE failed with status %s (%d).\n", + ib_wc_status_msg(wc->status), wc->status); nvmet_rdma_error_comp(queue); } return;