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Code Issues Releases Activity

Ensure that the MAD agent's delayed taskqueue is completely stopped

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before proceeding. Otherwise, nothing prevents it from running after the
MAD agent struct has been been freed, and this results in a use-after-free
when the task's ta_pending count is incremented in the callout handler.

MFC after:	2 weeks
Sponsored by:	EMC / Isilon Storage Division
This commit is contained in:
Mark Johnston 2015-09-15 23:56:31 +00:00
parent 319a55f4cd
commit 4af587d062
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=287837
1 changed files with 1 additions and 1 deletions
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sys/ofed/drivers/infiniband/core/mad.c
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@ -1053,7 +1053,7 @@ static void unregister_mad_agent(struct ib_mad_agent_private *mad_agent_priv)
*/
cancel_mads(mad_agent_priv);
port_priv = mad_agent_priv->qp_info->port_priv;
cancel_delayed_work(&mad_agent_priv->timed_work);
cancel_delayed_work_sync(&mad_agent_priv->timed_work);
spin_lock_irqsave(&port_priv->reg_lock, flags);
remove_mad_reg_req(mad_agent_priv);