From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-io1-f70.google.com (mail-io1-f70.google.com [209.85.166.70]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id F2F8A35F8D5 for ; Tue, 18 Nov 2025 14:57:27 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.166.70 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1763477849; cv=none; b=n0zld0hkKqzNCw2bPFuCEWXG1+SY/5PMdBn5kr5CypEYdVS3v87S5Oo4eb3ZS/MTuK2Yi/f2yy+EtMNhn3iltWaR+8wOnVZlPUbYwX3K5yzmzXu8rnOp7jLwYPbIvmyN4kJDgQUgjAyxLeK71GjG1hk/2XbVOD87BBp2mesfidg= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1763477849; c=relaxed/simple; bh=ruYCHusFkEH9KG2jSmGmY93iY/CEiGTZkjjn416cp2I=; h=MIME-Version:Date:In-Reply-To:Message-ID:Subject:From:To:Cc: Content-Type; b=Fafipu6HNGzNHczyCdjareBtFqzcdwDxC500Mmhp3t4UmkeIHZqOkzG/Wifxbh/1NXfxlCwXrY0NXqcOFe3KY+QdWEEj9TIYjev6AlV1BEuYPb6VwxXsb9a4AlK/5wtS6OHa4YdUDpetEYB3MZq0wek5t/JPhcR0JrIJGe2AmAk= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=fail (p=none dis=none) header.from=syzkaller.appspotmail.com; spf=pass smtp.mailfrom=M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com; arc=none smtp.client-ip=209.85.166.70 Authentication-Results: smtp.subspace.kernel.org; dmarc=fail (p=none dis=none) header.from=syzkaller.appspotmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com Received: by mail-io1-f70.google.com with SMTP id ca18e2360f4ac-9487df8723aso1131982639f.3 for ; Tue, 18 Nov 2025 06:57:27 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1763477847; x=1764082647; h=cc:to:from:subject:message-id:in-reply-to:date:mime-version :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=u763Shby4GQU/5OqcoMKzhO+KKK/dvga9Fa7xrTqfVg=; b=MSK9Es9yYedqzdOJvMNx5ZUuKtIWS+FK8NYlGWooIv8WxFED2MLG9Hjk5yazQ0sD5L O5pKvRTV2qT6t5Kjy8WcLOhE9eP0MBPLeW2s5d1u+uQxoPW5hU4eaOHs7Qq7JeZ6JymP VYnkp4y2TcKAqKcsPd4yRL70shliyIXfCDnuVZW+WOaqNv6H/1DJ3PRQqqCa4fF0UCUP 05KpjVVdPOnxZ63m4Uq+fjB2oYFLTBOtpYEdDJxcE6Cd0cLC10KuLCPfV3l1EcZEpdoh tRT5c/WJl06bd/IEA2AUv/bz8sLZ7YhBXBDsgmH4dILcn+AfrBcyWwm/aqagKczxnpBl IwzQ== X-Forwarded-Encrypted: i=1; AJvYcCX09rf9gYdv6e9TpTTrsncfKOswXz6R20sFiTpeAYeem8fkBS9ztnmYaKBjT0BogPNbbANGGNc=@vger.kernel.org X-Gm-Message-State: AOJu0Yx1zV+g056AIyrP9x+bLgy4nRokvIaRyV0y2eSzn/59a1c/KVl0 9JWxvVYfv6H1H6xHnJOofc1SoD/IWOcvs17gUv65CRQmhpjCellHOiL0CmIeLHUOVMjHKK1+b8x U+8EnGeLUkBthPmVT6Bww3e0rqF++fKzXsRucDXDbEK2fv2/5f/OF7Wcm3rI= X-Google-Smtp-Source: AGHT+IHa4N09KYI8/WNwIltWNhmJKlXVmJu3DeOqrGZ0vlm1Y96bjs9AjcmNtJPRcyC9kLIx3VFX6ZXPa2RYWqnjo0rNI9BKaFSd Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6e02:174b:b0:433:2240:a516 with SMTP id e9e14a558f8ab-4348c93d24amr231835385ab.30.1763477847195; Tue, 18 Nov 2025 06:57:27 -0800 (PST) Date: Tue, 18 Nov 2025 06:57:27 -0800 In-Reply-To: <20251118100046.2944392-1-skorodumov.dmitry@huawei.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <691c8957.a70a0220.3124cb.00cd.GAE@google.com> Subject: [syzbot ci] Re: ipvlan: support mac-nat mode From: syzbot ci To: andrew@lunn.ch, andrey.bokhanko@huawei.com, corbet@lwn.net, davem@davemloft.net, edumazet@google.com, horms@kernel.org, kuba@kernel.org, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org, netdev@vger.kernel.org, pabeni@redhat.com, shuah@kernel.org, skorodumov.dmitry@huawei.com Cc: syzbot@lists.linux.dev, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" syzbot ci has tested the following series [v4] ipvlan: support mac-nat mode https://lore.kernel.org/all/20251118100046.2944392-1-skorodumov.dmitry@huawei.com * [PATCH net-next 01/13] ipvlan: Support MACNAT mode * [PATCH net-next 02/13] ipvlan: macnat: Handle rx mcast-ip and unicast eth * [PATCH net-next 03/13] ipvlan: Forget all IP when device goes down * [PATCH net-next 04/13] ipvlan: Support IPv6 in macnat mode. * [PATCH net-next 05/13] ipvlan: Fix compilation warning about __be32 -> u32 * [PATCH net-next 06/13] ipvlan: Make the addrs_lock be per port * [PATCH net-next 07/13] ipvlan: Take addr_lock in ipvlan_open() * [PATCH net-next 08/13] ipvlan: Don't allow children to use IPs of main * [PATCH net-next 09/13] ipvlan: const-specifier for functions that use iaddr * [PATCH net-next 10/13] ipvlan: Common code from v6/v4 validator_event * [PATCH net-next 11/13] ipvlan: common code to handle ipv6/ipv4 address events * [PATCH net-next 12/13] ipvlan: Ignore PACKET_LOOPBACK in handle_mode_l2() * [PATCH net-next 13/13] selftests: drv-net: selftest for ipvlan-macnat mode and found the following issue: WARNING: suspicious RCU usage in ipvlan_addr_event Full report is available here: https://ci.syzbot.org/series/e483b93a-1063-4c8a-b0e2-89530e79768b *** WARNING: suspicious RCU usage in ipvlan_addr_event tree: net-next URL: https://kernel.googlesource.com/pub/scm/linux/kernel/git/netdev/net-next.git base: c99ebb6132595b4b288a413981197eb076547c5a arch: amd64 compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 config: https://ci.syzbot.org/builds/ac5af6f3-6b14-4e35-9d81-ee1522de3952/config 8021q: adding VLAN 0 to HW filter on device batadv0 ============================= WARNING: suspicious RCU usage syzkaller #0 Not tainted ----------------------------- drivers/net/ipvlan/ipvlan.h:128 suspicious rcu_dereference_check() usage! other info that might help us debug this: rcu_scheduler_active = 2, debug_locks = 1 2 locks held by syz-executor/5984: #0: ffffffff8f2cc248 (rtnl_mutex){+.+.}-{4:4}, at: inet_rtm_newaddr+0x3b0/0x18b0 #1: ffffffff8f39d9b0 ((inetaddr_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x54/0x90 stack backtrace: CPU: 1 UID: 0 PID: 5984 Comm: syz-executor Not tainted syzkaller #0 PREEMPT(full) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014 Call Trace: dump_stack_lvl+0x189/0x250 lockdep_rcu_suspicious+0x140/0x1d0 ipvlan_addr_event+0x60b/0x950 notifier_call_chain+0x1b6/0x3e0 blocking_notifier_call_chain+0x6a/0x90 __inet_insert_ifa+0xa13/0xbf0 inet_rtm_newaddr+0xf3a/0x18b0 rtnetlink_rcv_msg+0x7cf/0xb70 netlink_rcv_skb+0x208/0x470 netlink_unicast+0x82f/0x9e0 netlink_sendmsg+0x805/0xb30 __sock_sendmsg+0x21c/0x270 __sys_sendto+0x3bd/0x520 __x64_sys_sendto+0xde/0x100 do_syscall_64+0xfa/0xfa0 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f711f191503 Code: 64 89 02 48 c7 c0 ff ff ff ff eb b7 66 2e 0f 1f 84 00 00 00 00 00 90 80 3d 61 70 22 00 00 41 89 ca 74 14 b8 2c 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 75 c3 0f 1f 40 00 55 48 83 ec 30 44 89 4c 24 RSP: 002b:00007ffc44b05f28 EFLAGS: 00000202 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 00007f711ff14620 RCX: 00007f711f191503 RDX: 0000000000000028 RSI: 00007f711ff14670 RDI: 0000000000000003 RBP: 0000000000000001 R08: 00007ffc44b05f44 R09: 000000000000000c R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000003 R13: 0000000000000000 R14: 00007f711ff14670 R15: 0000000000000000 syz-executor (5984) used greatest stack depth: 19864 bytes left *** If these findings have caused you to resend the series or submit a separate fix, please add the following tag to your commit message: Tested-by: syzbot@syzkaller.appspotmail.com --- This report is generated by a bot. It may contain errors. syzbot ci engineers can be reached at syzkaller@googlegroups.com.