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nvme-rdma: Fix a use after free in nvmet_rdma_write_data_done

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[ Upstream commit abec6561fc4e0fbb19591a0b35676d8c783b5493 ]

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>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Lv Yunlong 2021-03-10 21:44:13 -08:00 committed by Greg Kroah-Hartman
parent c7b3f6db97
commit 8f0534c96a
1 changed files with 2 additions and 3 deletions
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5
drivers/nvme/target/rdma.c
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@ -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;