From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-ot1-f78.google.com (mail-ot1-f78.google.com [209.85.210.78]) (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 A0704175A99 for ; Thu, 13 Aug 2026 00:09:36 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.210.78 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1786579778; cv=none; b=duGE/rbrOwy66Uc9h2/e94EXP6C4vq/NaDF72xd3cQ2RBgSxM33Zv33N7dVdaXko40a2098WwZ8kN5ICO3x2ZRt6/IgKsCDz2VXf4qt/7G2kjewsJ6GuzfdYlBX0t1OfjWalxd8V54sPiO8W+yf8xnfR6VpxVvLt51fJzwaxFmo= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1786579778; c=relaxed/simple; bh=EuHtZ87x1ljNimARrMpzfU2RV5ISBPmGk2TQb0Qyu3w=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=b6cpewksO2VcdO3PqeIEWD0ihb6joyOZyFrAkNVnPmbuZOx2dS/e/KWtNdzy//xP4hlZiKTWqr9KtKzSvFbey1QuOGcLJFIsUA4s36HL0YIMlVsBY5sun1GOLi34hRmznsYWsv8NwyTLw0jRMTZ6tlrZEK6rWvES9TdEb9VrK/4= 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=209.85.210.78 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-ot1-f78.google.com with SMTP id 46e09a7af769-7e9e2db9914so581862a34.1 for ; Wed, 12 Aug 2026 17:09:36 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1786579776; x=1787184576; h=content-type:to:from:subject:message-id:date:mime-version :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to :content-type; bh=oNiJ8GOfUsqRQMoOAzytXiE/zC+9uK9EpwgD5iKmSnw=; b=LhVudI5e2K5/tHZJbvWS1YQS4xQKw+4p3KJ+Eg4LZnJJcffOeIFSD6c+SpAH5TeygO iqx6abtHBVeEWodP16j8XXHDw0ucPf02XyWmTmnJRjbPZ/jX1wRn7pbNsPhWjt83VgHJ +PKldFQny0NFLAyvEwoewktJmq8vMojYMZy98nHC86zojc3nK5S85VGIIFylPcwWkjeP ZouNq0AOow5DI0WbAp1wp8DmbfmlAohMjQpZ9LwQYghvLNN/BvXNCwT+BeuL2y3w/zvt dsGwjzDNwJ0mpQ1J09UT628RrgMAOnzTujXxZegaYEwpBVnneDjkkz0oy8tNGB8Rt6T2 FW0Q== X-Forwarded-Encrypted: i=1; AHgh+Ro6yuQW1dTS2lpkQSWUcoSyf21BmgDA/HMfPJmapx/wERnSVAsGTfieMGdM7yw0BM8ZI3j2rhLmGIhWAQY=@vger.kernel.org X-Gm-Message-State: AOJu0YyWrkkGjJE60V33s/Nxt1YlWfUJt7GcOdH9dRsEMery6dPPpSVl gvtJikdaFBbNyAiYvI2HAQuK1k95BQDzXeljSHvbC4LWbkkof8ueWEQdOnSmXa7oTJSLT3WrE+B Xarmv1Zorbp36lA18dJrlYKgTEy8sQowMmYAWBrWl1kw5lcj4G0vkHMzgLZw= Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6820:201c:b0:69d:7fdb:3416 with SMTP id 006d021491bc7-6b0c5cc7ea7mr1521275eaf.21.1786579775732; Wed, 12 Aug 2026 17:09:35 -0700 (PDT) Date: Wed, 12 Aug 2026 17:09:35 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6a7d0b3f.ac361c09.22ff0a.004d.GAE@google.com> Subject: [syzbot] [wireless?] WARNING in drv_unassign_vif_chanctx (4) 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: 9a143525f62b Merge tag 'ata-7.2-rc7' of git://git.kernel.o.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=14adefb9580000 kernel config: https://syzkaller.appspot.com/x/.config?x=aaf0da806f995318 dashboard link: https://syzkaller.appspot.com/bug?extid=63a84ea9c0f57d6133fa compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/36e9efe36a27/disk-9a143525.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/cf7e7297c673/vmlinux-9a143525.xz kernel image: https://storage.googleapis.com/syzbot-assets/3ddbff8e1c81/bzImage-9a143525.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+63a84ea9c0f57d6133fa@syzkaller.appspotmail.com ------------[ cut here ]------------ wlan0: Failed check-sdata-in-driver check, flags: 0x0 WARNING: net/mac80211/driver-ops.c:366 at drv_unassign_vif_chanctx+0x498/0x7d0 net/mac80211/driver-ops.c:366, CPU#1: kworker/u8:33/10061 Modules linked in: CPU: 1 UID: 0 PID: 10061 Comm: kworker/u8:33 Tainted: G L syzkaller #0 PREEMPT(full) Tainted: [L]=SOFTLOCKUP Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026 Workqueue: netns cleanup_net RIP: 0010:drv_unassign_vif_chanctx+0x4e5/0x7d0 net/mac80211/driver-ops.c:366 Code: 8d 78 0a 00 00 48 8b 02 48 8d b0 20 01 00 00 48 85 c0 48 0f 44 f1 42 0f b6 44 3d 00 84 c0 0f 85 95 01 00 00 41 8b 16 48 89 df <67> 48 0f b9 3a e9 04 fd ff ff e8 6c 20 8d f6 90 0f 0b 90 e9 3d fe RSP: 0018:ffffc9000d7ff090 EFLAGS: 00010246 RAX: 0000000000000000 RBX: ffffffff90695800 RCX: ffff888037171938 RDX: 0000000000000000 RSI: ffff888037170120 RDI: ffffffff90695800 RBP: 1ffff11006e2e325 R08: ffffffff90574637 R09: 1ffffffff20ae8c6 R10: dffffc0000000000 R11: fffffbfff20ae8c7 R12: ffff888037172c70 R13: ffff888037170ec0 R14: ffff888037171928 R15: dffffc0000000000 FS: 0000000000000000(0000) GS:ffff888125055000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000557e0c475950 CR3: 0000000051358000 CR4: 00000000003526f0 Call Trace: ieee80211_assign_link_chanctx+0x234/0xcd0 net/mac80211/chan.c:1199 __ieee80211_link_release_channel+0x3c6/0x610 net/mac80211/chan.c:2176 ieee80211_teardown_sdata+0xc1/0x240 net/mac80211/iface.c:916 unregister_netdevice_many_notify+0x1acd/0x2140 net/core/dev.c:12467 unregister_netdevice_many net/core/dev.c:12509 [inline] unregister_netdevice_queue+0x2f5/0x340 net/core/dev.c:12320 unregister_netdevice include/linux/netdevice.h:3474 [inline] _cfg80211_unregister_wdev+0x156/0x5a0 net/wireless/core.c:1422 ieee80211_remove_interfaces+0x49c/0x6a0 net/mac80211/iface.c:2492 ieee80211_unregister_hw+0x5d/0x2c0 net/mac80211/main.c:1718 mac80211_hwsim_del_radio+0x28a/0x4a0 drivers/net/wireless/virtual/mac80211_hwsim_main.c:6226 hwsim_exit_net+0xe8e/0xf50 drivers/net/wireless/virtual/mac80211_hwsim_main.c:7207 ops_exit_list net/core/net_namespace.c:199 [inline] ops_undo_list+0x43d/0x8d0 net/core/net_namespace.c:252 cleanup_net+0x572/0x810 net/core/net_namespace.c:702 process_one_work kernel/workqueue.c:3322 [inline] process_scheduled_works+0xa8e/0x14e0 kernel/workqueue.c:3405 worker_thread+0xa47/0xfb0 kernel/workqueue.c:3486 kthread+0x388/0x470 kernel/kthread.c:436 ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 ---------------- Code disassembly (best guess): 0: 8d 78 0a lea 0xa(%rax),%edi 3: 00 00 add %al,(%rax) 5: 48 8b 02 mov (%rdx),%rax 8: 48 8d b0 20 01 00 00 lea 0x120(%rax),%rsi f: 48 85 c0 test %rax,%rax 12: 48 0f 44 f1 cmove %rcx,%rsi 16: 42 0f b6 44 3d 00 movzbl 0x0(%rbp,%r15,1),%eax 1c: 84 c0 test %al,%al 1e: 0f 85 95 01 00 00 jne 0x1b9 24: 41 8b 16 mov (%r14),%edx 27: 48 89 df mov %rbx,%rdi * 2a: 67 48 0f b9 3a ud1 (%edx),%rdi <-- trapping instruction 2f: e9 04 fd ff ff jmp 0xfffffd38 34: e8 6c 20 8d f6 call 0xf68d20a5 39: 90 nop 3a: 0f 0b ud2 3c: 90 nop 3d: e9 .byte 0xe9 3e: 3d .byte 0x3d 3f: fe .byte 0xfe --- 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