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ipv4: initialise the itag variable in __mkroute_input

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[ Upstream commit fbdc0ad095 ]

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: Li RongQing <roy.qing.li@gmail.com>
Acked-by: Alexei Starovoitov <ast@plumgrid.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Li RongQing 2014-05-22 16:36:55 +08:00 committed by Greg Kroah-Hartman
parent 7c8a60a9e3
commit 62e1a647e7
1 changed files with 1 additions and 1 deletions
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2
net/ipv4/route.c
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@ -2129,7 +2129,7 @@ static int __mkroute_input(struct sk_buff *skb,
struct in_device *out_dev;
unsigned int flags = 0;
__be32 spec_dst;
u32 itag;
u32 itag = 0;
/* get a working reference to the output device */
out_dev = __in_dev_get_rcu(FIB_RES_DEV(*res));