diff options
| author | Karsten Graul <kgraul@linux.ibm.com> | 2021-12-27 14:35:30 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-01-05 12:40:30 +0100 |
| commit | a67becdaa8adbd14b7e9ad9ed8b511720efa93ff (patch) | |
| tree | bc7b0e9d79ff84946434722bbc5618a6f2a14b50 /net | |
| parent | 769d14abd35e0e153b5149c3e1e989a9d719e3ff (diff) | |
net/smc: fix using of uninitialized completions
[ Upstream commit 6d7373dabfd3933ee30c40fc8c09d2a788f6ece1 ]
In smc_wr_tx_send_wait() the completion on index specified by
pend->idx is initialized and after smc_wr_tx_send() was called the wait
for completion starts. pend->idx is used to get the correct index for
the wait, but the pend structure could already be cleared in
smc_wr_tx_process_cqe().
Introduce pnd_idx to hold and use a local copy of the correct index.
Fixes: 09c61d24f96d ("net/smc: wait for departure of an IB message")
Signed-off-by: Karsten Graul <kgraul@linux.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'net')
| -rw-r--r-- | net/smc/smc_wr.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/net/smc/smc_wr.c b/net/smc/smc_wr.c index 9dbe4804853e..a71c9631f1ad 100644 --- a/net/smc/smc_wr.c +++ b/net/smc/smc_wr.c @@ -288,18 +288,20 @@ int smc_wr_tx_send_wait(struct smc_link *link, struct smc_wr_tx_pend_priv *priv, unsigned long timeout) { struct smc_wr_tx_pend *pend; + u32 pnd_idx; int rc; pend = container_of(priv, struct smc_wr_tx_pend, priv); pend->compl_requested = 1; - init_completion(&link->wr_tx_compl[pend->idx]); + pnd_idx = pend->idx; + init_completion(&link->wr_tx_compl[pnd_idx]); rc = smc_wr_tx_send(link, priv); if (rc) return rc; /* wait for completion by smc_wr_tx_process_cqe() */ rc = wait_for_completion_interruptible_timeout( - &link->wr_tx_compl[pend->idx], timeout); + &link->wr_tx_compl[pnd_idx], timeout); if (rc <= 0) rc = -ENODATA; if (rc > 0) |