This is a note to let you know that I've just added the patch titled
netfilter: nf_tables: reject constant set with timeout
to the 4.19-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-nf_tables-reject-constant-set-with-timeout.patch
and it can be found in the queue-4.19 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 5f4fc4bd5cddb4770ab120ce44f02695c4505562 Mon Sep 17 00:00:00 2001
From: Pablo Neira Ayuso <pablo@xxxxxxxxxxxxx>
Date: Fri, 1 Mar 2024 01:04:11 +0100
Subject: netfilter: nf_tables: reject constant set with timeout
From: Pablo Neira Ayuso <pablo@xxxxxxxxxxxxx>
commit 5f4fc4bd5cddb4770ab120ce44f02695c4505562 upstream.
This set combination is weird: it allows for elements to be
added/deleted, but once bound to the rule it cannot be updated anymore.
Eventually, all elements expire, leading to an empty set which cannot
be updated anymore. Reject this flags combination.
Cc: stable@xxxxxxxxxxxxxxx
Fixes: 761da2935d6e ("netfilter: nf_tables: add set timeout API support")
Signed-off-by: Pablo Neira Ayuso <pablo@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
net/netfilter/nf_tables_api.c | 3 +++
1 file changed, 3 insertions(+)
--- a/net/netfilter/nf_tables_api.c
+++ b/net/netfilter/nf_tables_api.c
@@ -3563,6 +3563,9 @@ static int nf_tables_newset(struct net *
if ((flags & (NFT_SET_ANONYMOUS | NFT_SET_TIMEOUT | NFT_SET_EVAL)) ==
(NFT_SET_ANONYMOUS | NFT_SET_TIMEOUT))
return -EOPNOTSUPP;
+ if ((flags & (NFT_SET_CONSTANT | NFT_SET_TIMEOUT)) ==
+ (NFT_SET_CONSTANT | NFT_SET_TIMEOUT))
+ return -EOPNOTSUPP;
}
dtype = 0;
Patches currently in stable-queue which might be from pablo@xxxxxxxxxxxxx are
queue-4.19/netfilter-nf_tables-reject-constant-set-with-timeout.patch
queue-4.19/netfilter-nf_tables-disallow-anonymous-set-with-timeout-flag.patch
