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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
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')
-rw-r--r--net/ipv4/fib_frontend.c6
-rw-r--r--net/ipv4/route.c1
2 files changed, 4 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);
diff --git a/net/ipv4/route.c b/net/ipv4/route.c
index cb494a5050f7..584ed667bfa4 100644
--- a/net/ipv4/route.c
+++ b/net/ipv4/route.c
@@ -1876,6 +1876,7 @@ static int ip_route_input_slow(struct sk_buff *skb, __be32 daddr, __be32 saddr,
fl4.flowi4_flags = 0;
fl4.daddr = daddr;
fl4.saddr = saddr;
+ fl4.flowi4_uid = sock_net_uid(net, NULL);
err = fib_lookup(net, &fl4, &res, 0);
if (err != 0) {
if (!IN_DEV_FORWARD(in_dev))