From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-oo1-f77.google.com (mail-oo1-f77.google.com [209.85.161.77]) (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 C7FFC3A8723 for ; Fri, 29 May 2026 22:03:29 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.161.77 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1780092211; cv=none; b=BRNx3FYT4pJxkTRIc/9Ozb9EB+9ceWq+WQqlU43mGUZjjMdIk/Y7r76Idz5r/XPdPybLZnIk6N8+YE3Yb38m+DDGmEREyuQh8XWENuWOL5B/K4VxObj793RkJMVu7bsAs0/nBZI0I7cbsV/u19Fwjl3+1qB/Y8ie2Fkds3XrueQ= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1780092211; c=relaxed/simple; bh=WBh84XvDFCDTp0jtOC8GoKOBGcG6wnkhv2ySk+w/k1Y=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=uXIV150VRYrOarWEMWez2DYgqUnzTZaUNXAJ4WfVhTh/Dj9ITaZ4t2a6RQ7pfuqrwQRAjKa0hvO2fnq9crg2Z51ACVNwUXXlNHLwxpdyx1kKpjT0vQqg5cuHfjMIwVO8eKTmU0bQsBuJA+GaSXNMG+ZUZpjuI5Utw+S0ZC9PyRc= 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=209.85.161.77 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-oo1-f77.google.com with SMTP id 006d021491bc7-69de11bef3dso3839778eaf.0 for ; Fri, 29 May 2026 15:03:29 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1780092209; x=1780697009; h=to:from:subject:message-id:date:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=4nle5VR30MGwzjCS7xNPIw56/zDSpD+G661c/PI8W4E=; b=lC/nKDYwN/SKb8IjJ9goaVevUeEudPcIL89RclAdlULQ/1mc2GTpTUbkdb7PlZ/6xb ey346rlYbJ4WqAPp9j7Jq/ZS5lrscG/KqFsOTgxK1OYK0qOc7tUo/2/ydZZr0O6oxYkw Eu0C0RxiIYeumat1mnIJo+oufaZ3trxtJteP8VvKjwqd9aLxdvQIIN1YXxg2EvAN9eqp MlFbDXmKbJlVq9BDJ4dRJg1NLSrOKw/azm1tH9hv0UmKVbsmcrTSpuOEIx8BmgSPIikP FiKEHkMsRadmsAwCLDqTkPht8lGjJ+HuVQzijWOCDk11d97Nh6jZM4eD/+SXxFgSEPXZ zabg== X-Forwarded-Encrypted: i=1; AFNElJ8zloaGD2xXqPRw8HpKL9XrppC/JwmI4TjhKC0cuoyS2v4vpQwB8Tg5GsK3CF8Cnpa9xHp7mXWvoyFiuBc=@vger.kernel.org X-Gm-Message-State: AOJu0Yx5FnlsYZzSBmAMmwXgjsHDzmcYdH9kfvC/K0CZ7VyYv2IeUCFz fCS9m+7SziOHHdw54YSOwQlNISEkBsfRNv976sE5V5JAoIOlfcsMam771WcLdL/Z02MxTMfRLIx Mh7EjMU9Hw4l11EFphmwF0T2nlq0UrjoCumzEONombVhDyaiU1M8eLQ1A1B0= Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6820:2906:b0:69e:b8:ffe7 with SMTP id 006d021491bc7-69e105ca1e7mr640156eaf.58.1780092208851; Fri, 29 May 2026 15:03:28 -0700 (PDT) Date: Fri, 29 May 2026 15:03:28 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6a1a0d30.0a9e871e.332604.0009.GAE@google.com> Subject: [syzbot] [net?] BUG: sleeping function called from invalid context in netif_rx_mode_run From: syzbot To: davem@davemloft.net, edumazet@google.com, horms@kernel.org, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, pabeni@redhat.com, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: 4b4362973b6f Merge branch 'for-next/core' into for-kernelci git tree: git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci console output: https://syzkaller.appspot.com/x/log.txt?x=14a4c62e580000 kernel config: https://syzkaller.appspot.com/x/.config?x=a834c6344141a58b dashboard link: https://syzkaller.appspot.com/bug?extid=b54df935b5872a351231 compiler: Debian clang version 21.1.8 (++20251221033036+2078da43e25a-1~exp1~20251221153213.50), Debian LLD 21.1.8 userspace arch: arm64 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/f69f86c90ee5/disk-4b436297.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/79fa7b33aaab/vmlinux-4b436297.xz kernel image: https://storage.googleapis.com/syzbot-assets/ef080156d0de/Image-4b436297.gz.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+b54df935b5872a351231@syzkaller.appspotmail.com netlink: 28 bytes leftover after parsing attributes in process `syz.8.1045'. vlan2: left promiscuous mode geneve0: left promiscuous mode BUG: sleeping function called from invalid context at net/core/dev_addr_lists.c:1262 in_atomic(): 1, irqs_disabled(): 0, non_block: 0, pid: 13679, name: syz.8.1045 preempt_count: 201, expected: 0 RCU nest depth: 0, expected: 0 2 locks held by syz.8.1045/13679: #0: ffff800089b97600 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock net/core/rtnetlink.c:80 [inline] #0: ffff800089b97600 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_nets_lock+0x38/0x10c net/core/rtnetlink.c:341 #1: ffff0000d6170e58 (&br->lock){+.-.}-{3:3}, at: spin_lock_bh include/linux/spinlock.h:348 [inline] #1: ffff0000d6170e58 (&br->lock){+.-.}-{3:3}, at: br_port_slave_changelink+0x40/0x15c net/bridge/br_netlink.c:1212 Preemption disabled at: [] spin_lock_bh include/linux/spinlock.h:348 [inline] [] br_port_slave_changelink+0x40/0x15c net/bridge/br_netlink.c:1212 CPU: 0 UID: 0 PID: 13679 Comm: syz.8.1045 Tainted: G L syzkaller #0 PREEMPT Tainted: [L]=SOFTLOCKUP Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 Call trace: show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (C) __dump_stack+0x30/0x40 lib/dump_stack.c:94 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120 dump_stack+0x1c/0x28 lib/dump_stack.c:129 __might_resched+0x350/0x4ac kernel/sched/core.c:9163 __might_sleep+0x84/0xdc kernel/sched/core.c:9092 netif_rx_mode_run+0x124/0xb64 net/core/dev_addr_lists.c:1262 netif_rx_mode_sync+0x2c/0xbc net/core/dev_addr_lists.c:1428 dev_set_promiscuity+0x110/0x1fc net/core/dev_api.c:289 br_port_clear_promisc net/bridge/br_if.c:135 [inline] br_manage_promisc+0x2c0/0x33c net/bridge/br_if.c:172 nbp_update_port_count+0xf8/0x148 net/bridge/br_if.c:242 br_port_flags_change+0x60/0xa8 net/bridge/br_if.c:747 br_setport+0xac4/0x1230 net/bridge/br_netlink.c:1000 br_port_slave_changelink+0x134/0x15c net/bridge/br_netlink.c:1213 rtnl_changelink net/core/rtnetlink.c:3793 [inline] __rtnl_newlink net/core/rtnetlink.c:3973 [inline] rtnl_newlink+0xf80/0x113c net/core/rtnetlink.c:4110 rtnetlink_rcv_msg+0x66c/0x9c8 net/core/rtnetlink.c:6996 netlink_rcv_skb+0x22c/0x410 net/netlink/af_netlink.c:2550 rtnetlink_rcv+0x28/0x38 net/core/rtnetlink.c:7023 netlink_unicast_kernel net/netlink/af_netlink.c:1318 [inline] netlink_unicast+0x610/0x800 net/netlink/af_netlink.c:1344 netlink_sendmsg+0x63c/0x920 net/netlink/af_netlink.c:1894 sock_sendmsg_nosec net/socket.c:787 [inline] __sock_sendmsg+0xc8/0x138 net/socket.c:802 ____sys_sendmsg+0x418/0x70c net/socket.c:2698 ___sys_sendmsg+0x198/0x224 net/socket.c:2752 __sys_sendmsg+0x160/0x214 net/socket.c:2784 __do_sys_sendmsg net/socket.c:2789 [inline] __se_sys_sendmsg net/socket.c:2787 [inline] __arm64_sys_sendmsg+0x80/0x94 net/socket.c:2787 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x244 arch/arm64/kernel/syscall.c:49 el0_svc_common+0xe8/0x23c arch/arm64/kernel/syscall.c:121 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:140 el0_svc+0x64/0x260 arch/arm64/kernel/entry-common.c:740 el0t_64_sync_handler+0x48/0x148 arch/arm64/kernel/entry-common.c:759 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:594 geneve0: entered promiscuous mode bridge0: port 2(bridge_slave_1) entered disabled state bridge_slave_1: left allmulticast mode bridge_slave_1: left promiscuous mode bridge0: port 2(bridge_slave_1) entered disabled state --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@googlegroups.com. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. If the report is already addressed, let syzbot know by replying with: #syz fix: exact-commit-title If you want to overwrite report's subsystems, reply with: #syz set subsystems: new-subsystem (See the list of subsystem names on the web dashboard) If the report is a duplicate of another one, reply with: #syz dup: exact-subject-of-another-report If you want to undo deduplication, reply with: #syz undup