6.17-stable review patch. If anyone has any objections, please let me know.
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From: Shuhao Fu sfual@cse.ust.hk
[ Upstream commit d8713158faad0fd4418cb2f4e432c3876ad53a1f ]
In `UVERBS_METHOD_CQ_CREATE`, umem should be released if anything goes wrong. Currently, if `create_cq_umem` fails, umem would not be released or referenced, causing a possible leak.
In this patch, we release umem at `UVERBS_METHOD_CQ_CREATE`, the driver should not release umem if it returns an error code.
Fixes: 1a40c362ae26 ("RDMA/uverbs: Add a common way to create CQ with umem") Signed-off-by: Shuhao Fu sfual@cse.ust.hk Link: https://patch.msgid.link/aOh1le4YqtYwj-hH@osx.local Signed-off-by: Leon Romanovsky leon@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/infiniband/core/uverbs_std_types_cq.c | 1 + drivers/infiniband/hw/efa/efa_verbs.c | 16 +++++++--------- 2 files changed, 8 insertions(+), 9 deletions(-)
diff --git a/drivers/infiniband/core/uverbs_std_types_cq.c b/drivers/infiniband/core/uverbs_std_types_cq.c index 37cd375565104..fab5d914029dd 100644 --- a/drivers/infiniband/core/uverbs_std_types_cq.c +++ b/drivers/infiniband/core/uverbs_std_types_cq.c @@ -206,6 +206,7 @@ static int UVERBS_HANDLER(UVERBS_METHOD_CQ_CREATE)( return ret;
err_free: + ib_umem_release(umem); rdma_restrack_put(&cq->res); kfree(cq); err_event_file: diff --git a/drivers/infiniband/hw/efa/efa_verbs.c b/drivers/infiniband/hw/efa/efa_verbs.c index 886923d5fe506..542d25e191ea6 100644 --- a/drivers/infiniband/hw/efa/efa_verbs.c +++ b/drivers/infiniband/hw/efa/efa_verbs.c @@ -1216,13 +1216,13 @@ int efa_create_cq_umem(struct ib_cq *ibcq, const struct ib_cq_init_attr *attr, if (umem->length < cq->size) { ibdev_dbg(&dev->ibdev, "External memory too small\n"); err = -EINVAL; - goto err_free_mem; + goto err_out; }
if (!ib_umem_is_contiguous(umem)) { ibdev_dbg(&dev->ibdev, "Non contiguous CQ unsupported\n"); err = -EINVAL; - goto err_free_mem; + goto err_out; }
cq->cpu_addr = NULL; @@ -1251,7 +1251,7 @@ int efa_create_cq_umem(struct ib_cq *ibcq, const struct ib_cq_init_attr *attr,
err = efa_com_create_cq(&dev->edev, ¶ms, &result); if (err) - goto err_free_mem; + goto err_free_mapped;
resp.db_off = result.db_off; resp.cq_idx = result.cq_idx; @@ -1299,12 +1299,10 @@ int efa_create_cq_umem(struct ib_cq *ibcq, const struct ib_cq_init_attr *attr, efa_cq_user_mmap_entries_remove(cq); err_destroy_cq: efa_destroy_cq_idx(dev, cq->cq_idx); -err_free_mem: - if (umem) - ib_umem_release(umem); - else - efa_free_mapped(dev, cq->cpu_addr, cq->dma_addr, cq->size, DMA_FROM_DEVICE); - +err_free_mapped: + if (!umem) + efa_free_mapped(dev, cq->cpu_addr, cq->dma_addr, cq->size, + DMA_FROM_DEVICE); err_out: atomic64_inc(&dev->stats.create_cq_err); return err;