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RDMA/rxe: Fix memory leak in error path code

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In rxe_mr_init_user() at the third error the driver fails to free the
memory at mr->map. This patch adds code to do that.  This error only
occurs if page_address() fails to return a non zero address which should
never happen for 64 bit architectures.

Fixes: 8700e3e7c4 ("Soft RoCE driver")
Link: https://lore.kernel.org/r/20210705164153.17652-1-rpearsonhpe@gmail.com
Reported by: Haakon Bugge <haakon.bugge@oracle.com>
Signed-off-by: Bob Pearson <rpearsonhpe@gmail.com>
Reviewed-by: Zhu Yanjun <zyjzyj2000@gmail.com>
Reviewed-by: Håkon Bugge <haakon.bugge@oracle.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
This commit is contained in:
Bob Pearson 2021-07-05 11:41:54 -05:00 committed by Jason Gunthorpe
parent c9538831b3
commit b18c7da63f
1 changed files with 17 additions and 10 deletions
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27
drivers/infiniband/sw/rxe/rxe_mr.c
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@ -113,13 +113,14 @@ int rxe_mr_init_user(struct rxe_pd *pd, u64 start, u64 length, u64 iova,
int num_buf;
void *vaddr;
int err;
int i;
umem = ib_umem_get(pd->ibpd.device, start, length, access);
if (IS_ERR(umem)) {
pr_warn("err %d from rxe_umem_get\n",
(int)PTR_ERR(umem));
pr_warn("%s: Unable to pin memory region err = %d\n",
__func__, (int)PTR_ERR(umem));
err = PTR_ERR(umem);
goto err1;
goto err_out;
}
mr->umem = umem;
@ -129,9 +130,9 @@ int rxe_mr_init_user(struct rxe_pd *pd, u64 start, u64 length, u64 iova,
err = rxe_mr_alloc(mr, num_buf);
if (err) {
pr_warn("err %d from rxe_mr_alloc\n", err);
ib_umem_release(umem);
goto err1;
pr_warn("%s: Unable to allocate memory for map\n",
__func__);
goto err_release_umem;
}
mr->page_shift = PAGE_SHIFT;
@ -151,10 +152,10 @@ int rxe_mr_init_user(struct rxe_pd *pd, u64 start, u64 length, u64 iova,
vaddr = page_address(sg_page_iter_page(&sg_iter));
if (!vaddr) {
pr_warn("null vaddr\n");
ib_umem_release(umem);
pr_warn("%s: Unable to get virtual address\n",
__func__);
err = -ENOMEM;
goto err1;
goto err_cleanup_map;
}
buf->addr = (uintptr_t)vaddr;
@ -177,7 +178,13 @@ int rxe_mr_init_user(struct rxe_pd *pd, u64 start, u64 length, u64 iova,
return 0;
err1:
err_cleanup_map:
for (i = 0; i < mr->num_map; i++)
kfree(mr->map[i]);
kfree(mr->map);
err_release_umem:
ib_umem_release(umem);
err_out:
return err;
}