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dst: catch uninitialized metrics
author
Stephen Hemminger
<shemminger@vyatta.com>
Tue, 24 May 2011 17:50:52 +0000
(13:50 -0400)
committer
David S. Miller
<davem@davemloft.net>
Tue, 24 May 2011 17:50:52 +0000
(13:50 -0400)
Catch cases where dst_metric_set() and other functions are called
but _metrics is NULL.
Signed-off-by: Stephen Hemminger <shemminger@vyatta.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
include/net/dst.h
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diff --git
a/include/net/dst.h
b/include/net/dst.h
index
07a0402
..
7d15d23
100644
(file)
--- a/
include/net/dst.h
+++ b/
include/net/dst.h
@@
-111,6
+111,8
@@
static inline u32 *dst_metrics_write_ptr(struct dst_entry *dst)
{
unsigned long p = dst->_metrics;
+ BUG_ON(!p);
+
if (p & DST_METRICS_READ_ONLY)
return dst->ops->cow_metrics(dst, p);
return __DST_METRICS_PTR(p);