unimore/kernel-hacking-2024-linux-steffo
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ipv4: initialise the itag variable in __mkroute_input

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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>
This commit is contained in:
Li RongQing 2014-05-22 16:36:55 +08:00 committed by David S. Miller
parent d0c21d43a5
commit fbdc0ad095
1 changed files with 1 additions and 1 deletions
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2
net/ipv4/route.c
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@ -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));