linux-kernel - [PATCH 5.18 007/102] ipv6: take care of disable

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20220705115618.623537187@linuxfoundation.org>
Date:   Tue,  5 Jul 2022 13:57:33 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, stable@...nel.org,
        David Forster <dforster@...cade.com>,
        Siwar Zitouni <siwar.zitouni@...nd.com>,
        Nicolas Dichtel <nicolas.dichtel@...nd.com>,
        David Ahern <dsahern@...nel.org>,
        Jakub Kicinski <kuba@...nel.org>
Subject: [PATCH 5.18 007/102] ipv6: take care of disable_policy when restoring routes

From: Nicolas Dichtel <nicolas.dichtel@...nd.com>

commit 3b0dc529f56b5f2328244130683210be98f16f7f upstream.

When routes corresponding to addresses are restored by
fixup_permanent_addr(), the dst_nopolicy parameter was not set.
The typical use case is a user that configures an address on a down
interface and then put this interface up.

Let's take care of this flag in addrconf_f6i_alloc(), so that every callers
benefit ont it.

CC: stable@...nel.org
CC: David Forster <dforster@...cade.com>
Fixes: df789fe75206 ("ipv6: Provide ipv6 version of "disable_policy" sysctl")
Reported-by: Siwar Zitouni <siwar.zitouni@...nd.com>
Signed-off-by: Nicolas Dichtel <nicolas.dichtel@...nd.com>
Reviewed-by: David Ahern <dsahern@...nel.org>
Link: https://lore.kernel.org/r/20220623120015.32640-1-nicolas.dichtel@6wind.com
Signed-off-by: Jakub Kicinski <kuba@...nel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 net/ipv6/addrconf.c |    4 ----
 net/ipv6/route.c    |    9 ++++++++-
 2 files changed, 8 insertions(+), 5 deletions(-)

--- a/net/ipv6/addrconf.c
+++ b/net/ipv6/addrconf.c
@@ -1109,10 +1109,6 @@ ipv6_add_addr(struct inet6_dev *idev, st
 		goto out;
 	}
 
-	if (net->ipv6.devconf_all->disable_policy ||
-	    idev->cnf.disable_policy)
-		f6i->dst_nopolicy = true;
-
 	neigh_parms_data_state_setall(idev->nd_parms);
 
 	ifa->addr = *cfg->pfx;
--- a/net/ipv6/route.c
+++ b/net/ipv6/route.c
@@ -4565,8 +4565,15 @@ struct fib6_info *addrconf_f6i_alloc(str
 	}
 
 	f6i = ip6_route_info_create(&cfg, gfp_flags, NULL);
-	if (!IS_ERR(f6i))
+	if (!IS_ERR(f6i)) {
 		f6i->dst_nocount = true;
+
+		if (!anycast &&
+		    (net->ipv6.devconf_all->disable_policy ||
+		     idev->cnf.disable_policy))
+			f6i->dst_nopolicy = true;
+	}
+
 	return f6i;
 }