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| author | David S. Miller <davem@davemloft.net> | 2010-09-06 22:36:19 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2010-09-07 13:57:24 -0700 |
| commit | 6f86b325189e0a53c97bf86cff0c8b02ff624934 (patch) | |
| tree | 856badf9fa6205b2216eb4301a0776da70d5b28a /net | |
| parent | 8df73ff90f00f14d2c7ff7156f7ef153f7e9d3b7 (diff) | |
| download | linux-6f86b325189e0a53c97bf86cff0c8b02ff624934.tar.gz linux-6f86b325189e0a53c97bf86cff0c8b02ff624934.tar.bz2 linux-6f86b325189e0a53c97bf86cff0c8b02ff624934.zip | |
ipv4: Fix reverse path filtering with multipath routing.
Actually iterate over the next-hops to make sure we have
a device match. Otherwise RP filtering is always elided
when the route matched has multiple next-hops.
Reported-by: Igor M Podlesny <for.poige@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
| -rw-r--r-- | net/ipv4/fib_frontend.c | 15 |
1 files changed, 13 insertions, 2 deletions
diff --git a/net/ipv4/fib_frontend.c b/net/ipv4/fib_frontend.c index a43968918350..7d02a9f999fa 100644 --- a/net/ipv4/fib_frontend.c +++ b/net/ipv4/fib_frontend.c @@ -246,6 +246,7 @@ int fib_validate_source(__be32 src, __be32 dst, u8 tos, int oif, struct fib_result res; int no_addr, rpf, accept_local; + bool dev_match; int ret; struct net *net; @@ -273,12 +274,22 @@ int fib_validate_source(__be32 src, __be32 dst, u8 tos, int oif, } *spec_dst = FIB_RES_PREFSRC(res); fib_combine_itag(itag, &res); + dev_match = false; + #ifdef CONFIG_IP_ROUTE_MULTIPATH - if (FIB_RES_DEV(res) == dev || res.fi->fib_nhs > 1) + for (ret = 0; ret < res.fi->fib_nhs; ret++) { + struct fib_nh *nh = &res.fi->fib_nh[ret]; + + if (nh->nh_dev == dev) { + dev_match = true; + break; + } + } #else if (FIB_RES_DEV(res) == dev) + dev_match = true; #endif - { + if (dev_match) { ret = FIB_RES_NH(res).nh_scope >= RT_SCOPE_HOST; fib_res_put(&res); return ret; |