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Avoid that ib_drain_qp() triggers an out-of-bounds stack access in ibcore.

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Linux commit:
a1ae7d0345edd593d6725d3218434d903a0af95d

MFC after:		1 week
Sponsored by:		Mellanox Technologies
This commit is contained in:
Hans Petter Selasky 2018-07-17 09:14:20 +00:00
parent 7477a89ae2
commit 91f0e6e1d8
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=336374
1 changed files with 8 additions and 3 deletions
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11
sys/ofed/drivers/infiniband/core/ib_verbs.c
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@ -1940,7 +1940,13 @@ static void __ib_drain_sq(struct ib_qp *qp)
{
struct ib_qp_attr attr = { .qp_state = IB_QPS_ERR };
struct ib_drain_cqe sdrain;
struct ib_send_wr swr = {}, *bad_swr;
struct ib_send_wr *bad_swr;
struct ib_rdma_wr swr = {
.wr = {
.opcode = IB_WR_RDMA_WRITE,
.wr_cqe = &sdrain.cqe,
},
};
int ret;
if (qp->send_cq->poll_ctx == IB_POLL_DIRECT) {
@ -1949,7 +1955,6 @@ static void __ib_drain_sq(struct ib_qp *qp)
return;
}
swr.wr_cqe = &sdrain.cqe;
sdrain.cqe.done = ib_drain_qp_done;
init_completion(&sdrain.done);
@ -1959,7 +1964,7 @@ static void __ib_drain_sq(struct ib_qp *qp)
return;
}
ret = ib_post_send(qp, &swr, &bad_swr);
ret = ib_post_send(qp, &swr.wr, &bad_swr);
if (ret) {
WARN_ONCE(ret, "failed to drain send queue: %d\n", ret);
return;