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tipc: Add missing broadcast link lock when sending NACK
Ensures that any attempt to send a NACK message over TIPC's broadcast link has exclusive access to the link's main data structures, to prevent interference with a simultaneous attempt to send other broadcast link traffic (such as application-generated multicast messages). Signed-off-by: Allan Stephens <allan.stephens@windriver.com> Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
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@ -340,8 +340,10 @@ static void bclink_send_nack(struct tipc_node *n_ptr)
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msg_set_bcgap_to(msg, n_ptr->bclink.gap_to);
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msg_set_bcast_tag(msg, tipc_own_tag);
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spin_lock_bh(&bc_lock);
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tipc_bearer_send(&bcbearer->bearer, buf, NULL);
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bcl->stats.sent_nacks++;
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spin_unlock_bh(&bc_lock);
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buf_discard(buf);
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/*
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