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RDMA/iw_cxgb4: Fix incorrect function parameters 

While reading the TCB field in t4_tcb_get_field32() the wrong mask is
passed as a parameter which leads the driver eventually to a kernel
panic/app segfault from access to an illegal SRQ index while flushing the
SRQ completions during connection teardown.

Fixes: 11a27e2121 ("iw_cxgb4: complete the cached SRQ buffers")
Link: https://lore.kernel.org/r/20200511185608.5202-1-bharat@chelsio.com
Signed-off-by: Potnuri Bharat Teja <bharat@chelsio.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
This commit is contained in:
Potnuri Bharat Teja 2020-05-12 00:26:08 +05:30 committed by Jason Gunthorpe
parent 50bbe3d34f
commit c8b1f340e5
1 changed files with 3 additions and 4 deletions
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7
drivers/infiniband/hw/cxgb4/cm.c
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@ -2891,8 +2891,7 @@ static int peer_abort(struct c4iw_dev *dev, struct sk_buff *skb)
srqidx = ABORT_RSS_SRQIDX_G(
be32_to_cpu(req->srqidx_status));
if (srqidx) {
complete_cached_srq_buffers(ep,
req->srqidx_status);
complete_cached_srq_buffers(ep, srqidx);
} else {
/* Hold ep ref until finish_peer_abort() */
c4iw_get_ep(&ep->com);
@ -3878,8 +3877,8 @@ static int read_tcb_rpl(struct c4iw_dev *dev, struct sk_buff *skb)
return 0;
}
ep->srqe_idx = t4_tcb_get_field32(tcb, TCB_RQ_START_W, TCB_RQ_START_W,
TCB_RQ_START_S);
ep->srqe_idx = t4_tcb_get_field32(tcb, TCB_RQ_START_W, TCB_RQ_START_M,
TCB_RQ_START_S);
cleanup:
pr_debug("ep %p tid %u %016x\n", ep, ep->hwtid, ep->srqe_idx);