This is a note to let you know that I've just added the patch titled
netfilter: xt_recent: fix (increase) ipv6 literal buffer length
to the 5.15-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
netfilter-xt_recent-fix-increase-ipv6-literal-buffer.patch
and it can be found in the queue-5.15 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 7bb911d83f9bf03a49c5a94fb177dbb81f28f182
Author: Maciej Żenczykowski <zenczykowski@xxxxxxxxx>
Date: Sun Nov 5 11:56:00 2023 -0800
netfilter: xt_recent: fix (increase) ipv6 literal buffer length
[ 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@xxxxxxxxx>
Reviewed-by: Simon Horman <horms@xxxxxxxxxx>
Signed-off-by: Pablo Neira Ayuso <pablo@xxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/net/netfilter/xt_recent.c b/net/netfilter/xt_recent.c
index 0446307516cdf..39937ff245275 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;
