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netfilter: ipset: List timing out entries with "timeout 1" instead of zero

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[ Upstream commit bd975e6914 ]

When listing sets with timeout support, there's a probability that
just timing out entries with "0" timeout value is listed/saved.
However when restoring the saved list, the zero timeout value means
permanent elelements.

The new behaviour is that timing out entries are listed with "timeout 1"
instead of zero.

Fixes netfilter bugzilla #1258.

Signed-off-by: Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Jozsef Kadlecsik
2018-05-31 18:45:21 +02:00
committed by Greg Kroah-Hartman
parent af1ecd4b5f
commit d77ff3576f
1 changed files with 8 additions and 2 deletions
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10
include/linux/netfilter/ipset/ip_set_timeout.h
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@@ -65,8 +65,14 @@ ip_set_timeout_set(unsigned long *timeout, u32 value)
static inline u32
ip_set_timeout_get(unsigned long *timeout)
{
return *timeout == IPSET_ELEM_PERMANENT ? 0 :
jiffies_to_msecs(*timeout - jiffies)/MSEC_PER_SEC;
u32 t;
if (*timeout == IPSET_ELEM_PERMANENT)
return 0;
t = jiffies_to_msecs(*timeout - jiffies)/MSEC_PER_SEC;
/* Zero value in userspace means no timeout */
return t == 0 ? 1 : t;
}
#endif /* __KERNEL__ */