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RDMA/mad: Fix possible memory leak in ib_mad_post_receive_mads()

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[ Upstream commit a17f4bed811c60712d8131883cdba11a105d0161 ]

If ib_dma_mapping_error() returns non-zero value,
ib_mad_post_receive_mads() will jump out of loops and return -ENOMEM
without freeing mad_priv. Fix this memory-leak problem by freeing mad_priv
in this case.

Fixes: 2c34e68f4261 ("IB/mad: Check and handle potential DMA mapping errors")
Link: https://lore.kernel.org/r/20200612063824.180611-1-guofan5@huawei.com
Signed-off-by: Fan Guo <guofan5@huawei.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Fan Guo 2020-06-12 14:38:24 +08:00 committed by Sasha Levin
parent d3edf648f3
commit 34f4556746
1 changed files with 1 additions and 0 deletions
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drivers/infiniband/core/mad.c
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@ -2960,6 +2960,7 @@ static int ib_mad_post_receive_mads(struct ib_mad_qp_info *qp_info,
DMA_FROM_DEVICE);
if (unlikely(ib_dma_mapping_error(qp_info->port_priv->device,
sg_list.addr))) {
kfree(mad_priv);
ret = -ENOMEM;
break;
}