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Make sure the VNET is properly set when reaping mbufs in ipoib.

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Else the following panic may happen:

panic()
icmp_error()
ipoib_cm_mb_reap()
linux_work_fn()
taskqueue_run_locked()
taskqueue_thread_loop()
fork_exit()
fork_trampoline()

Submitted by:	Andreas Kempe <kempe@lysator.liu.se>
MFC after:	1 week
Sponsored by:	Mellanox Technologies
This commit is contained in:
Hans Petter Selasky 2020-01-11 12:02:16 +00:00
parent 5bc41c932f
commit ae5b45c86e
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=356633
1 changed files with 4 additions and 0 deletions
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4
sys/ofed/drivers/infiniband/ulp/ipoib/ipoib_cm.c
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@ -1268,6 +1268,8 @@ static void ipoib_cm_mb_reap(struct work_struct *work)
spin_lock_irqsave(&priv->lock, flags);
CURVNET_SET_QUIET(priv->dev->if_vnet);
for (;;) {
IF_DEQUEUE(&priv->cm.mb_queue, mb);
if (mb == NULL)
@ -1294,6 +1296,8 @@ static void ipoib_cm_mb_reap(struct work_struct *work)
spin_lock_irqsave(&priv->lock, flags);
}
CURVNET_RESTORE();
spin_unlock_irqrestore(&priv->lock, flags);
}