netfilter: xt_recent: fix (increase) ipv6 literal buffer length
in6_pton() supports 'low-32-bit dot-decimal representation'
(this is useful with DNS64/NAT64 networks for example):
# echo +aaaa:bbbb:cccc:dddd:eeee:ffff:1.2.3.4 > /proc/self/net/xt_recent/DEFAULT
# cat /proc/self/net/xt_recent/DEFAULT
src=aaaa:bbbb:cccc:dddd:eeee:ffff:0102:0304 ttl: 0 last_seen: 9733848829 oldest_pkt: 1 9733848829
but the provided buffer is too short:
# echo +aaaa:bbbb:cccc:dddd:eeee:ffff:255.255.255.255 > /proc/self/net/xt_recent/DEFAULT
-bash: echo: write error: Invalid argument
Fixes: 079aa88fe7
("netfilter: xt_recent: IPv6 support")
Signed-off-by: Maciej Żenczykowski <zenczykowski@gmail.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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@ -561,7 +561,7 @@ recent_mt_proc_write(struct file *file, const char __user *input,
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{
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struct recent_table *t = pde_data(file_inode(file));
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struct recent_entry *e;
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char buf[sizeof("+b335:1d35:1e55:dead:c0de:1715:5afe:c0de")];
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char buf[sizeof("+b335:1d35:1e55:dead:c0de:1715:255.255.255.255")];
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const char *c = buf;
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union nf_inet_addr addr = {};
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u_int16_t family;
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