4.14-stable review patch. If anyone has any objections, please let me know.
------------------
From: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
[ Upstream commit c2d7c8ff89b22ddefb1ac2986c0d48444a667689 ]
"nents" is an unsigned int, so if ib_map_mr_sg() returns a negative
error code then it's type promoted to a high unsigned int which is
treated as success.
Fixes: a060b5629ab0 ("IB/core: generic RDMA READ/WRITE API")
Signed-off-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
Signed-off-by: Jason Gunthorpe <jgg@xxxxxxxxxxxx>
Signed-off-by: Sasha Levin <alexander.levin@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/infiniband/core/rw.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/infiniband/core/rw.c
+++ b/drivers/infiniband/core/rw.c
@@ -87,7 +87,7 @@ static int rdma_rw_init_one_mr(struct ib
}
ret = ib_map_mr_sg(reg->mr, sg, nents, &offset, PAGE_SIZE);
- if (ret < nents) {
+ if (ret < 0 || ret < nents) {
ib_mr_pool_put(qp, &qp->rdma_mrs, reg->mr);
return -EINVAL;
}
