dst: catch uninitialized metrics · 1f37070d3f - Gogs

dst: catch uninitialized metrics

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>

Stephen Hemminger 14 years ago

parent

5d8bee676f

commit

1f37070d3f

1 changed files with 2 additions and 0 deletions

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							+ 2
							
							- 0
						
include/net/dst.h
							 
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				@@ -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);