From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-io1-f79.google.com (mail-io1-f79.google.com [209.85.166.79]) (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 0094B2F9DBD for ; Tue, 18 Nov 2025 09:12:25 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.166.79 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1763457148; cv=none; b=Of9WcnO8ckShr3T1jfU/ELjSzcsO7GvjJUOhRLTKX0/NTCMi0m4EcFmScZZd78fmbYir3pbGXFWMDi08KqL1Twivqrka+p9FAhhiWf4UqIXAOfVfBkMqz4LOA7fAOnM4Oj1PpfSLkegQL5PanLJBz1v5zscj6+oFri7aFuQqkzg= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1763457148; c=relaxed/simple; bh=RMHiKfDDZRF4XKtK3FvegO8GyEZ0WcrzD9nGISsyTbI=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=QgklhtOuKEb/b0MiFwGJazKPUnAtvWdp6jiJIOrhnUOra+bFKJH4497O/GUcrB857xIEZ1/Pb2a2BpEUmgOf8Z2g9/9jRqx3oD0YI/j2qMcKMhGO1IfJ58gyALF3Q8aQ4pX/4h/BA9fzdLPHZMkCy7DDZSPVkDrgLQVBvl+oMdQ= 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=209.85.166.79 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-f79.google.com with SMTP id ca18e2360f4ac-9489a3f6e3dso939599139f.0 for ; Tue, 18 Nov 2025 01:12:25 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1763457144; x=1764061944; h=to:from:subject:message-id:date:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=ZCPCBiDseJTYHAymJetqpym/2ftXtJI5iOpKOSwwOu8=; b=ggQ/HX/ENdd0RLNswQn9tpAVUEfrcu5Zw9cBekf43ew5/YOJBYt89/6XOb04JrqFSJ mpaWfw2Sh8boW8btp1IlculJthIcZGWGqzfdyqPcOwCb5hWvI0lpIurDCdF26hB4KyZL 36hRO8ztu2ewAfgKJr5Iuekg7ZJsaNLeLxEH4QRMr5TBjdYua4vHvtF9ClwvjXfEZFbZ cXt2GynYuqihtbVpV2ob7mPDYiMtnw93sDlxsey3FU9EnmuiUagyA1qkKvCt61kH7beW MwDXB4fAJ2gawWAH2OrYF8xip5g9x4yfQdrXpdqulz/ejEHB+e6cxRLcptueZO+MdSo1 68Pg== X-Forwarded-Encrypted: i=1; AJvYcCWN4rhyL2531ioNoZDchnyUfrpTEeiWgB0X7Pw8P5T28O+P9ZwaQ8NG3107wEFTpzPWFqXX4jDggoshYK0=@vger.kernel.org X-Gm-Message-State: AOJu0Yxv2up7DqecPMBONKdGGLfsEWaMffE0nnauHxanPEZpY9b7S02E MrTTY/cVMmELq11v4bvFCsvyRp/OAN95jAPnvjJabQGOVUa0z8J2CNTY1iwhVcnpWp3uMi8pv8p K+kqDf/B6ozmjDO88qRhuK+VZPO8u7Uy5ayAOH4bLpJcpKs1XaszBtYAMnjI= X-Google-Smtp-Source: AGHT+IHbXwBOmPJLm6wPLuoglDX5/xd6oe773wnP4kFD6s8nnbvi1P7vk4tk6PUBU6UeysoSGSqlg9jn7cKoVjP7wvVISevaja92 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6e02:b44:b0:433:79a7:8158 with SMTP id e9e14a558f8ab-4348c9334c1mr166286595ab.27.1763457144310; Tue, 18 Nov 2025 01:12:24 -0800 (PST) Date: Tue, 18 Nov 2025 01:12:24 -0800 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <691c3878.a70a0220.3124cb.00b9.GAE@google.com> Subject: [syzbot] [wireless?] WARNING: suspicious RCU usage in ieee80211_mesh_csa_beacon (2) From: syzbot To: johannes@sipsolutions.net, linux-kernel@vger.kernel.org, linux-wireless@vger.kernel.org, netdev@vger.kernel.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: 7a0892d2836e Merge tag 'pci-v6.18-fixes-5' of git://git.ke.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=1100a212580000 kernel config: https://syzkaller.appspot.com/x/.config?x=929790bc044e87d7 dashboard link: https://syzkaller.appspot.com/bug?extid=b59873f5699e941717ca compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=12656884580000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=15519212580000 Downloadable assets: disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/d900f083ada3/non_bootable_disk-7a0892d2.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/a78c5c2efd8d/vmlinux-7a0892d2.xz kernel image: https://storage.googleapis.com/syzbot-assets/5a51cc5df960/bzImage-7a0892d2.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+b59873f5699e941717ca@syzkaller.appspotmail.com R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000002 R13: 00007f4e229e5fa0 R14: 00007f4e229e5fa0 R15: 0000000000000003 ============================= WARNING: suspicious RCU usage syzkaller #0 Not tainted ----------------------------- net/mac80211/mesh.c:1571 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.0.17/5477: #0: ffffffff8f333750 (cb_lock){++++}-{4:4}, at: genl_rcv+0x19/0x40 net/netlink/genetlink.c:1218 #1: ffff888059ba0788 (&rdev->wiphy.mtx){+.+.}-{4:4}, at: wiphy_lock include/net/cfg80211.h:6343 [inline] #1: ffff888059ba0788 (&rdev->wiphy.mtx){+.+.}-{4:4}, at: nl80211_pre_doit+0x281/0x930 net/wireless/nl80211.c:17999 stack backtrace: CPU: 0 UID: 0 PID: 5477 Comm: syz.0.17 Not tainted syzkaller #0 PREEMPT(full) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 Call Trace: dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120 lockdep_rcu_suspicious+0x140/0x1d0 kernel/locking/lockdep.c:6876 ieee80211_mesh_csa_beacon+0x280/0x2c0 net/mac80211/mesh.c:1571 ieee80211_set_csa_beacon+0x3cc/0x9a0 net/mac80211/cfg.c:4288 __ieee80211_channel_switch net/mac80211/cfg.c:4406 [inline] ieee80211_channel_switch+0x8ef/0xcb0 net/mac80211/cfg.c:4442 rdev_channel_switch+0x108/0x290 net/wireless/rdev-ops.h:1116 nl80211_channel_switch+0xac9/0xd70 net/wireless/nl80211.c:11475 genl_family_rcv_msg_doit+0x215/0x300 net/netlink/genetlink.c:1115 genl_family_rcv_msg net/netlink/genetlink.c:1195 [inline] genl_rcv_msg+0x60e/0x790 net/netlink/genetlink.c:1210 netlink_rcv_skb+0x208/0x470 net/netlink/af_netlink.c:2552 genl_rcv+0x28/0x40 net/netlink/genetlink.c:1219 netlink_unicast_kernel net/netlink/af_netlink.c:1320 [inline] netlink_unicast+0x82f/0x9e0 net/netlink/af_netlink.c:1346 netlink_sendmsg+0x805/0xb30 net/netlink/af_netlink.c:1896 sock_sendmsg_nosec net/socket.c:727 [inline] __sock_sendmsg+0x21c/0x270 net/socket.c:742 ____sys_sendmsg+0x505/0x830 net/socket.c:2630 ___sys_sendmsg+0x21f/0x2a0 net/socket.c:2684 __sys_sendmsg net/socket.c:2716 [inline] __do_sys_sendmsg net/socket.c:2721 [inline] __se_sys_sendmsg net/socket.c:2719 [inline] __x64_sys_sendmsg+0x19b/0x260 net/socket.c:2719 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0xfa0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f4e2278f6c9 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffe9e0535c8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007f4e229e5fa0 RCX: 00007f4e2278f6c9 RDX: 0000000000000000 RSI: 0000200000004180 RDI: 0000000000000003 RBP: 00007ffe9e053620 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000002 R13: 00007f4e229e5fa0 R14: 00007f4e229e5fa0 R15: 0000000000000003 --- 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 syzbot to run the reproducer, reply with: #syz test: git://repo/address.git branch-or-commit-hash If you attach or paste a git patch, syzbot will apply it before testing. 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