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| author | Hannes Frederic Sowa <hannes@stressinduktion.org> | 2013-08-07 02:34:31 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-09-14 05:50:48 -0700 |
| commit | 24e6771d4fce7c77b2569fa33131c871a2c5642e (patch) | |
| tree | f88a069753ea62d24fe25b34127767cf8a8fe4a3 /net/ipv6 | |
| parent | dd3004635fe0607f64ca9ceca51f209fbc0a09a6 (diff) | |
| download | kernel_samsung_smdk4412-24e6771d4fce7c77b2569fa33131c871a2c5642e.tar.gz kernel_samsung_smdk4412-24e6771d4fce7c77b2569fa33131c871a2c5642e.tar.bz2 kernel_samsung_smdk4412-24e6771d4fce7c77b2569fa33131c871a2c5642e.zip | |
ipv6: don't stop backtracking in fib6_lookup_1 if subtree does not match
[ Upstream commit 3e3be275851bc6fc90bfdcd732cd95563acd982b ]
In case a subtree did not match we currently stop backtracking and return
NULL (root table from fib_lookup). This could yield in invalid routing
table lookups when using subtrees.
Instead continue to backtrack until a valid subtree or node is found
and return this match.
Also remove unneeded NULL check.
Reported-by: Teco Boot <teco@inf-net.nl>
Cc: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
Cc: David Lamparter <equinox@diac24.net>
Cc: <boutier@pps.univ-paris-diderot.fr>
Signed-off-by: Hannes Frederic Sowa <hannes@stressinduktion.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'net/ipv6')
| -rw-r--r-- | net/ipv6/ip6_fib.c | 16 |
1 files changed, 12 insertions, 4 deletions
diff --git a/net/ipv6/ip6_fib.c b/net/ipv6/ip6_fib.c index 320d91d20ad..1a503ab9fa8 100644 --- a/net/ipv6/ip6_fib.c +++ b/net/ipv6/ip6_fib.c @@ -866,14 +866,22 @@ static struct fib6_node * fib6_lookup_1(struct fib6_node *root, if (ipv6_prefix_equal(&key->addr, args->addr, key->plen)) { #ifdef CONFIG_IPV6_SUBTREES - if (fn->subtree) - fn = fib6_lookup_1(fn->subtree, args + 1); + if (fn->subtree) { + struct fib6_node *sfn; + sfn = fib6_lookup_1(fn->subtree, + args + 1); + if (!sfn) + goto backtrack; + fn = sfn; + } #endif - if (!fn || fn->fn_flags & RTN_RTINFO) + if (fn->fn_flags & RTN_RTINFO) return fn; } } - +#ifdef CONFIG_IPV6_SUBTREES +backtrack: +#endif if (fn->fn_flags & RTN_ROOT) break; |