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net/smc: fix double kfree in smc_listen_work()

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If smc_listen_rmda_finish() returns with an error, the storage
addressed by 'buf' is freed a second time.
Consolidate freeing under a common label and jump to that label.

Fixes: 6bb14e48ee ("net/smc: dynamic allocation of CLC proposal buffer")
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Ursula Braun <ubraun@linux.ibm.com>
Signed-off-by: Karsten Graul <kgraul@linux.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Ursula Braun 2020-09-17 22:46:02 +02:00 committed by David S. Miller
parent 86d009f1cb
commit ac679364b9
1 changed files with 2 additions and 2 deletions
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4
net/smc/af_smc.c
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@ -1371,7 +1371,6 @@ static void smc_listen_work(struct work_struct *work)
}
/* finish worker */
kfree(buf);
if (!ism_supported) {
rc = smc_listen_rdma_finish(new_smc, &cclc,
ini.first_contact_local);
@ -1381,12 +1380,13 @@ static void smc_listen_work(struct work_struct *work)
}
smc_conn_save_peer_info(new_smc, &cclc);
smc_listen_out_connected(new_smc);
return;
goto out_free;
out_unlock:
mutex_unlock(&smc_server_lgr_pending);
out_decl:
smc_listen_decline(new_smc, rc, ini.first_contact_local);
out_free:
kfree(buf);
}