Author: hselasky
Date: Sat Jan 11 12:02:16 2020
New Revision: 356633
URL: https://svnweb.freebsd.org/changeset/base/356633
Log:
Make sure the VNET is properly set when reaping mbufs in ipoib.
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 <ke...@lysator.liu.se>
MFC after: 1 week
Sponsored by: Mellanox Technologies
Modified:
head/sys/ofed/drivers/infiniband/ulp/ipoib/ipoib_cm.c
Modified: head/sys/ofed/drivers/infiniband/ulp/ipoib/ipoib_cm.c
==============================================================================
--- head/sys/ofed/drivers/infiniband/ulp/ipoib/ipoib_cm.c Sat Jan 11
11:38:02 2020 (r356632)
+++ head/sys/ofed/drivers/infiniband/ulp/ipoib/ipoib_cm.c Sat Jan 11
12:02:16 2020 (r356633)
@@ -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)
@@ -1293,6 +1295,8 @@ static void ipoib_cm_mb_reap(struct work_struct *work)
spin_lock_irqsave(&priv->lock, flags);
}
+
+ CURVNET_RESTORE();
spin_unlock_irqrestore(&priv->lock, flags);
}
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