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| author | Karsten Graul <kgraul@linux.ibm.com> | 2021-12-27 14:35:30 +0100 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2021-12-27 14:46:17 +0000 |
| commit | 6d7373dabfd3933ee30c40fc8c09d2a788f6ece1 (patch) | |
| tree | 5d0710bc18de96399506cd99e77f045c10defd99 | |
| parent | c1833c3964d5bd8c163bd4e01736a38bc473cb8a (diff) | |
| download | linux-6d7373dabfd3933ee30c40fc8c09d2a788f6ece1.tar.gz linux-6d7373dabfd3933ee30c40fc8c09d2a788f6ece1.tar.bz2 linux-6d7373dabfd3933ee30c40fc8c09d2a788f6ece1.zip | |
net/smc: fix using of uninitialized completions
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>
| -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 600ab5889227..79a7431f534e 100644 --- a/net/smc/smc_wr.c +++ b/net/smc/smc_wr.c @@ -358,18 +358,20 @@ 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) |