5.4-stable review patch. If anyone has any objections, please let me know.
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From: Maciej Żenczykowski zenczykowski@gmail.com
[ Upstream commit 7b308feb4fd2d1c06919445c65c8fbf8e9fd1781 ]
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: 079aa88fe717 ("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 Signed-off-by: Sasha Levin sashal@kernel.org --- net/netfilter/xt_recent.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/net/netfilter/xt_recent.c b/net/netfilter/xt_recent.c index 3469b60736103..6fc0deb11aff2 100644 --- a/net/netfilter/xt_recent.c +++ b/net/netfilter/xt_recent.c @@ -561,7 +561,7 @@ recent_mt_proc_write(struct file *file, const char __user *input, { struct recent_table *t = PDE_DATA(file_inode(file)); struct recent_entry *e; - char buf[sizeof("+b335:1d35:1e55:dead:c0de:1715:5afe:c0de")]; + char buf[sizeof("+b335:1d35:1e55:dead:c0de:1715:255.255.255.255")]; const char *c = buf; union nf_inet_addr addr = {}; u_int16_t family;