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authorKarsten Graul <kgraul@linux.ibm.com>2020-02-26 17:52:46 +0100
committerDavid S. Miller <davem@davemloft.net>2020-02-26 20:56:25 -0800
commita2f2ef4a54c0d97aa6a8386f4ff23f36ebb488cf (patch)
treeec405d8d9f4372a0fbda16a353967123a93bd9e1
parent474a31e13a4e9749fb3ee55794d69d0f17ee0998 (diff)
net/smc: check for valid ib_client_data
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>
-rw-r--r--net/smc/smc_ib.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/net/smc/smc_ib.c b/net/smc/smc_ib.c
index 548632621f4b..d6ba186f67e2 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 */