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Fix access to non-initialized CM_ID object in ibcore.

Browse Source 
The attempt to join multicast group without ensuring that CMA device
exists will lead to the following crash reported by syzkaller.

Linux commit:
7688f2c3bbf55e52388e37ac5d63ca471a7712e1

MFC after:		1 week
Sponsored by:		Mellanox Technologies
This commit is contained in:
Hans Petter Selasky 2018-07-17 09:15:50 +00:00
parent 91f0e6e1d8
commit ed222171a9
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=336375
1 changed files with 3 additions and 0 deletions
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3
sys/ofed/drivers/infiniband/core/ib_cma.c
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@ -4064,6 +4064,9 @@ int rdma_join_multicast(struct rdma_cm_id *id, struct sockaddr *addr,
struct cma_multicast *mc;
int ret;
if (!id->device)
return -EINVAL;
id_priv = container_of(id, struct rdma_id_private, id);
if (!cma_comp(id_priv, RDMA_CM_ADDR_BOUND) &&
!cma_comp(id_priv, RDMA_CM_ADDR_RESOLVED))