diff options
| author | Karsten Graul <kgraul@linux.ibm.com> | 2020-02-26 17:52:46 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-03-18 07:19:20 +0100 |
| commit | 40d816c70e095e684f69978f3a51c94156f84eb5 (patch) | |
| tree | 0222f296a8332bb2c15989f67c64c2c5b3ee15ad | |
| parent | 8b871cdcbb11ed43c8268f89584e670b4cda7e12 (diff) | |
net/smc: check for valid ib_client_data
commit a2f2ef4a54c0d97aa6a8386f4ff23f36ebb488cf upstream.
In smc_ib_remove_dev() check if the provided ib device was actually
initialized for SMC before.
Reported-by: syzbot+84484ccebdd4e5451d91@syzkaller.appspotmail.com
Fixes: a4cf0443c414 ("smc: introduce SMC as an IB-client")
Signed-off-by: Karsten Graul <kgraul@linux.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | net/smc/smc_ib.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/net/smc/smc_ib.c b/net/smc/smc_ib.c index 32fee2ca7c4c..05b825b3cfa4 100644 --- a/net/smc/smc_ib.c +++ b/net/smc/smc_ib.c @@ -573,6 +573,8 @@ static void smc_ib_remove_dev(struct ib_device *ibdev, void *client_data) struct smc_ib_device *smcibdev; smcibdev = ib_get_client_data(ibdev, &smc_ib_client); + if (!smcibdev || smcibdev->ibdev != ibdev) + return; ib_set_client_data(ibdev, &smc_ib_client, NULL); spin_lock(&smc_ib_devices.lock); list_del_init(&smcibdev->list); /* remove from smc_ib_devices */ |