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authorJulian Anastasov <ja@ssi.bg>2017-02-26 15:50:52 +0200
committerDavid S. Miller <davem@davemloft.net>2017-02-26 11:03:38 -0500
commit8bcfd0925ef15f072ba1e7bee2c25e9e1b5fd6ca (patch)
treef3390a0540238f4d5168ae4883deb73026182848 /net/ipv4/fib_frontend.c
parent8118b7b76c8c087055054884a39db6a7d138e1c5 (diff)
ipv4: add missing initialization for flowi4_uid
Avoid matching of random stack value for uid when rules are looked up on input route or when RP filter is used. Problem should affect only setups that use ip rules with uid range. Fixes: 622ec2c9d524 ("net: core: add UID to flows, rules, and routes") Signed-off-by: Julian Anastasov <ja@ssi.bg> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4/fib_frontend.c')
-rw-r--r--net/ipv4/fib_frontend.c6
1 files changed, 3 insertions, 3 deletions
diff --git a/net/ipv4/fib_frontend.c b/net/ipv4/fib_frontend.c
index 7db2ad2e82d3..b39a791f6756 100644
--- a/net/ipv4/fib_frontend.c
+++ b/net/ipv4/fib_frontend.c
@@ -319,7 +319,7 @@ static int __fib_validate_source(struct sk_buff *skb, __be32 src, __be32 dst,
int ret, no_addr;
struct fib_result res;
struct flowi4 fl4;
- struct net *net;
+ struct net *net = dev_net(dev);
bool dev_match;
fl4.flowi4_oif = 0;
@@ -332,6 +332,7 @@ static int __fib_validate_source(struct sk_buff *skb, __be32 src, __be32 dst,
fl4.flowi4_scope = RT_SCOPE_UNIVERSE;
fl4.flowi4_tun_key.tun_id = 0;
fl4.flowi4_flags = 0;
+ fl4.flowi4_uid = sock_net_uid(net, NULL);
no_addr = idev->ifa_list == NULL;
@@ -339,13 +340,12 @@ static int __fib_validate_source(struct sk_buff *skb, __be32 src, __be32 dst,
trace_fib_validate_source(dev, &fl4);
- net = dev_net(dev);
if (fib_lookup(net, &fl4, &res, 0))
goto last_resort;
if (res.type != RTN_UNICAST &&
(res.type != RTN_LOCAL || !IN_DEV_ACCEPT_LOCAL(idev)))
goto e_inval;
- if (!rpf && !fib_num_tclassid_users(dev_net(dev)) &&
+ if (!rpf && !fib_num_tclassid_users(net) &&
(dev->ifindex != oif || !IN_DEV_TX_REDIRECTS(idev)))
goto last_resort;
fib_combine_itag(itag, &res);