Koki Sanagi ec764bf083 net: tracepoint of net_dev_xmit sees freed skb and causes panic ... Because there is a possibility that skb is kfree_skb()ed and zero cleared after ndo_start_xmit, we should not see the contents of skb like skb->len and skb->dev->name after ndo_start_xmit. But trace_net_dev_xmit does that and causes panic by NULL pointer dereference. This patch fixes trace_net_dev_xmit not to see the contents of skb directly. If you want to reproduce this panic, 1. Get tracepoint of net_dev_xmit on 2. Create 2 guests on KVM 2. Make 2 guests use virtio_net 4. Execute netperf from one to another for a long time as a network burden 5. host will panic(It takes about 30 minutes) Signed-off-by: Koki Sanagi <sanagi.koki@jp.fujitsu.com> Signed-off-by: David S. Miller <davem@davemloft.net>		2011-06-02 14:06:31 -07:00
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events	net: tracepoint of net_dev_xmit sees freed skb and causes panic	2011-06-02 14:06:31 -07:00
define_trace.h	tracing: Include module.h in define_trace.h	2011-01-07 15:44:56 -05:00
ftrace.h	tracing: Replace trace_event struct array with pointer array	2011-02-02 21:37:13 -05:00
syscall.h	tracing: Use a global field list for all syscall exit events	2010-06-28 17:12:44 -04:00