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Commit fbdc0ad0 authored by Li RongQing's avatar Li RongQing Committed by David S. Miller
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ipv4: initialise the itag variable in __mkroute_input 



the value of itag is a random value from stack, and may not be initiated by
fib_validate_source, which called fib_combine_itag if CONFIG_IP_ROUTE_CLASSID
is not set

This will make the cached dst uncertainty

Signed-off-by: default avatarLi RongQing <roy.qing.li@gmail.com>
Acked-by: default avatarAlexei Starovoitov <ast@plumgrid.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent d0c21d43

net/ipv4/route.c

+1 −1
Original line number Diff line number Diff line
@@ -1519,7 +1519,7 @@ static int __mkroute_input(struct sk_buff *skb, 
	struct in_device *out_dev;

	unsigned int flags = 0;

	bool do_cache;

	u32 itag;

	u32 itag = 0;



	/* get a working reference to the output device */

	out_dev = __in_dev_get_rcu(FIB_RES_DEV(*res));