From: Karsten Graul <kgraul@xxxxxxxxxxxxx>
commit a2f2ef4a54c0d97aa6a8386f4ff23f36ebb488cf upstream.
In smc_ib_remove_dev() check if the provided ib device was actually
initialized for SMC before.
Reported-by: syzbot+84484ccebdd4e5451d91@xxxxxxxxxxxxxxxxxxxxxxxxx
Fixes: a4cf0443c414 ("smc: introduce SMC as an IB-client")
Signed-off-by: Karsten Graul <kgraul@xxxxxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
net/smc/smc_ib.c | 2 ++
1 file changed, 2 insertions(+)
--- a/net/smc/smc_ib.c
+++ b/net/smc/smc_ib.c
@@ -560,6 +560,8 @@ static void smc_ib_remove_dev(struct ib_
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 */
