diff options
| author | Jozsef Kadlecsik <kadlec@blackhole.kfki.hu> | 2012-05-07 02:35:44 +0000 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2012-10-21 09:28:00 -0700 |
| commit | 0fc58b2ff3f70a6bcfac562c68ec62939c37268a (patch) | |
| tree | b18b3e78186d41acd9c5b1ba73c3e5a3aff807d3 /include | |
| parent | 7fcbcdc96302e9d3e3b36df4fbc86a4c82761092 (diff) | |
netfilter: ipset: fix timeout value overflow bug
commit 127f559127f5175e4bec3dab725a34845d956591 upstream.
Large timeout parameters could result wrong timeout values due to
an overflow at msec to jiffies conversion (reported by Andreas Herz)
[ This patch was mangled by Pablo Neira Ayuso since David Laight and
Eric Dumazet noticed that we were using hardcoded 1000 instead of
MSEC_PER_SEC to calculate the timeout ]
Signed-off-by: Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Acked-by: David Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/netfilter/ipset/ip_set_timeout.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/include/linux/netfilter/ipset/ip_set_timeout.h b/include/linux/netfilter/ipset/ip_set_timeout.h index 47923205a4a..41d9cfa0816 100644 --- a/include/linux/netfilter/ipset/ip_set_timeout.h +++ b/include/linux/netfilter/ipset/ip_set_timeout.h @@ -30,6 +30,10 @@ ip_set_timeout_uget(struct nlattr *tb) { unsigned int timeout = ip_set_get_h32(tb); + /* Normalize to fit into jiffies */ + if (timeout > UINT_MAX/MSEC_PER_SEC) + timeout = UINT_MAX/MSEC_PER_SEC; + /* Userspace supplied TIMEOUT parameter: adjust crazy size */ return timeout == IPSET_NO_TIMEOUT ? IPSET_NO_TIMEOUT - 1 : timeout; } |