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author | Gao Feng <fgao@ikuai8.com> | 2017-03-24 16:32:19 +0300 |
---|---|---|
committer | Pablo Neira Ayuso <pablo@netfilter.org> | 2017-04-06 19:32:16 +0300 |
commit | 92f73221f9e9e143d242e3eca9c512dac969765e (patch) | |
tree | 9c493bd487511b3230393788568bfe3ae3ae81a2 /net/netfilter/nf_conntrack_irc.c | |
parent | f323d9546927a012cafbb7e503e6aa0e9fbff94b (diff) | |
download | linux-92f73221f9e9e143d242e3eca9c512dac969765e.tar.xz |
netfilter: expect: Make sure the max_expected limit is effective
Because the type of expecting, the member of nf_conn_help, is u8, it
would overflow after reach U8_MAX(255). So it doesn't work when we
configure the max_expected exceeds 255 with expect policy.
Now add the check for max_expected. Return the -EINVAL when it exceeds
the limit.
Signed-off-by: Gao Feng <fgao@ikuai8.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Diffstat (limited to 'net/netfilter/nf_conntrack_irc.c')
-rw-r--r-- | net/netfilter/nf_conntrack_irc.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/net/netfilter/nf_conntrack_irc.c b/net/netfilter/nf_conntrack_irc.c index 1972a149f958..1a5af4d4af2d 100644 --- a/net/netfilter/nf_conntrack_irc.c +++ b/net/netfilter/nf_conntrack_irc.c @@ -243,6 +243,12 @@ static int __init nf_conntrack_irc_init(void) return -EINVAL; } + if (max_dcc_channels > NF_CT_EXPECT_MAX_CNT) { + pr_err("max_dcc_channels must not be more than %u\n", + NF_CT_EXPECT_MAX_CNT); + return -EINVAL; + } + irc_exp_policy.max_expected = max_dcc_channels; irc_exp_policy.timeout = dcc_timeout; |