diff options
| author | Jason Gunthorpe <jgg@nvidia.com> | 2020-07-27 12:57:12 +0300 |
|---|---|---|
| committer | Jason Gunthorpe <jgg@nvidia.com> | 2020-07-27 11:50:20 -0300 |
| commit | 5351a56b1a4ceafd7a17ebfdf3cda430cdfd365d (patch) | |
| tree | a7fca9b130689e77a13168c5aacf2f426f5a2ab6 /drivers/infiniband/hw/mlx5 | |
| parent | 31142a4ba617f5aa8aefdf1c65561ca30d43f360 (diff) | |
RDMA/mlx5: Fix prefetch memory leak if get_prefetchable_mr fails
destroy_prefetch_work() must always be called if the work is not going
to be queued. The num_sge also should have been set to i, not i-1
which avoids the condition where it shouldn't have been called in the
first place.
Cc: stable@vger.kernel.org
Fixes: fb985e278a30 ("RDMA/mlx5: Use SRCU properly in ODP prefetch")
Link: https://lore.kernel.org/r/20200727095712.495652-1-leon@kernel.org
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Diffstat (limited to 'drivers/infiniband/hw/mlx5')
| -rw-r--r-- | drivers/infiniband/hw/mlx5/odp.c | 5 |
1 files changed, 2 insertions, 3 deletions
diff --git a/drivers/infiniband/hw/mlx5/odp.c b/drivers/infiniband/hw/mlx5/odp.c index 1ab676b66894..77dca1e05bba 100644 --- a/drivers/infiniband/hw/mlx5/odp.c +++ b/drivers/infiniband/hw/mlx5/odp.c @@ -1797,9 +1797,7 @@ static bool init_prefetch_work(struct ib_pd *pd, work->frags[i].mr = get_prefetchable_mr(pd, advice, sg_list[i].lkey); if (!work->frags[i].mr) { - work->num_sge = i - 1; - if (i) - destroy_prefetch_work(work); + work->num_sge = i; return false; } @@ -1865,6 +1863,7 @@ int mlx5_ib_advise_mr_prefetch(struct ib_pd *pd, srcu_key = srcu_read_lock(&dev->odp_srcu); if (!init_prefetch_work(pd, advice, pf_flags, work, sg_list, num_sge)) { srcu_read_unlock(&dev->odp_srcu, srcu_key); + destroy_prefetch_work(work); return -EINVAL; } queue_work(system_unbound_wq, &work->work); |