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| author | Joonwoo Park <joonwpark81@gmail.com> | 2008-01-18 03:44:48 -0800 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2008-01-20 20:31:37 -0800 |
| commit | bd566e7525b5986864e8d6eb5b67640abcd284a9 (patch) | |
| tree | ef53396f419171eb1db49803d84c0c8b50af0ca8 /net/ipv4/fib_hash.c | |
| parent | b3652b2dc5ec6ccd946ae9136b30c6babb81305a (diff) | |
| download | linux-stable-bd566e7525b5986864e8d6eb5b67640abcd284a9.tar.gz linux-stable-bd566e7525b5986864e8d6eb5b67640abcd284a9.tar.bz2 linux-stable-bd566e7525b5986864e8d6eb5b67640abcd284a9.zip | |
[IPV4] fib_hash: fix duplicated route issue
http://bugzilla.kernel.org/show_bug.cgi?id=9493
The fib allows making identical routes with 'ip route replace'.
This patch makes the fib return -EEXIST if replacement would cause duplication.
Signed-off-by: Joonwoo Park <joonwpark81@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4/fib_hash.c')
| -rw-r--r-- | net/ipv4/fib_hash.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/net/ipv4/fib_hash.c b/net/ipv4/fib_hash.c index 527a6e0af5b6..99071d79c5e7 100644 --- a/net/ipv4/fib_hash.c +++ b/net/ipv4/fib_hash.c @@ -444,6 +444,9 @@ static int fn_hash_insert(struct fib_table *tb, struct fib_config *cfg) struct fib_info *fi_drop; u8 state; + if (fi->fib_treeref > 1) + goto out; + write_lock_bh(&fib_hash_lock); fi_drop = fa->fa_info; fa->fa_info = fi; |