IB/cm: Remove cma_multicast->igmp_joined

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This variable isn't read and written to with proper locking, so it is
racy. Instead of using an unlocked bool use presence in the mc->list

The caller could race rdma_join_multicast with rdma_leave_multicast which
would leak a mc join and cause a use after free of mc.

Instead, do not add the mc to the list until it has completed
initialization, all mcs on the list require leaving.

Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>

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This commit is contained in:

Jason Gunthorpe 2018-07-11 11:20:29 +03:00

parent 1215cb7c88

commit c012691508

1 changed files with 23 additions and 30 deletions

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51

drivers/infiniband/core/cma.c

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