From: Karsten Graul kgraul@linux.ibm.com
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
--- net/smc/smc_ib.c | 2 ++ 1 file changed, 2 insertions(+)
--- a/net/smc/smc_ib.c +++ b/net/smc/smc_ib.c @@ -552,6 +552,8 @@ 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 */