From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-oa1-f80.google.com (mail-oa1-f80.google.com [209.85.160.80]) (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 36A2B3A9DB6 for ; Mon, 27 Apr 2026 19:28:30 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.160.80 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1777318114; cv=none; b=fQ/00vXv72k0uNBjVfhoWboPv1AdT5MJnkVeiLEzXUQT4VKAK2HUUwKdrHRXuJrSJ6AG2jrirX5SWpiC3wZzGDKX9zJml0cdoWssmhJ2rasu9XA1aIotIUecIKfijCLl/eEiBcUqvHYl7iCi0XZopdTc6xywIDwj8LmSHy4+aRA= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1777318114; c=relaxed/simple; bh=vDnlNvFsiKfBUAeE3yo2FrQ/z2Fbdaq1YP6FVHqXliQ=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=WWH46po3yGq5Dd0t8weC0G7PJIapKeLKKOBu7gXTeYMeeF1YN+p/Pja6ENdvEeGAesKuyaXI9pU1RlPWC7ARKgFFs5aM6b0eTnADY7rGNojd/mN02S33Bs8Wpf9TVQvSvOs99qkuyUgtX4rhChjXUUlYfLQE/JCB6G42ASoQqBI= 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=209.85.160.80 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-oa1-f80.google.com with SMTP id 586e51a60fabf-415e1ea16b4so17056130fac.1 for ; Mon, 27 Apr 2026 12:28:30 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1777318109; x=1777922909; h=to:from:subject:message-id:date:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=W/5m4sNbQauXf7WFmroEZt12sAZYc20CnXn6gV9B6iU=; b=RBkS15fY1C65Y5Kqd26CYg+Kbv9tGD2VqKa0H2JN1c5A6+7L+JA6nF/tVa2s5ZtHhw wRSGR7BJnHzwEGkub95O/YAiy+qsKVb+c/IFV4kboxYAqEep1HLgSDQqc0sl5ilYm+V8 gmLhIdKqzdFM42AXtHzTH+MUZ2YBKJqNDSK+5UHO2psYdmiMAO+cHnvYfus9cA34HHvb 2crnhra/Uca46wlsgkohPDsFXJheumczLi1EHh04BNMhZS3giwUoZ6GktPJtk4X407yR hZ5IN+E5S9VJnMyragSZWqs2i5P/CnZTv+OYadviuzMLXp2MdbCrUH/sezQfYaXaS4WK 53SQ== X-Forwarded-Encrypted: i=1; AFNElJ8nhIodmvnLEUQV96Zqpd3GAGNXgMAFKsNH1LTMyhdyhEddqQPMO5RKUwe4p51nfERShhDoyBL15hkFhhzl4g==@vger.kernel.org X-Gm-Message-State: AOJu0YyePYbzRlMakXMrz43u//swB6gZkwJwSN8aUDsI4SQs05LRVqZn SjfAikyETqwy0XeYZJAPVdfBcXL17XZLdGmTQo3vHwXJH6Gosgq6Vvx7k96zak+fJCib3nmhCOm +1NkJNFFbLmdix5JXKSExlty+zW1/fpz9/rf0OJa7ebTv9mJf63yQnZqc5oM= Precedence: bulk X-Mailing-List: linux-wireless@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6820:3082:b0:68d:804:55d7 with SMTP id 006d021491bc7-6965b94ced6mr228791eaf.17.1777318109582; Mon, 27 Apr 2026 12:28:29 -0700 (PDT) Date: Mon, 27 Apr 2026 12:28:29 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <69efb8dd.050a0220.18b4f.0006.GAE@google.com> Subject: [syzbot] [wireless?] divide error in mac80211_hwsim_link_info_changed (3) 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: 254f49634ee1 Linux 7.1-rc1 git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=13b32348580000 kernel config: https://syzkaller.appspot.com/x/.config?x=4caf64b1ee83dac0 dashboard link: https://syzkaller.appspot.com/bug?extid=ca7a2759caaa6cd4e3db compiler: Debian clang version 21.1.8 (++20251221033036+2078da43e25a-1~exp1~20251221153213.50), Debian LLD 21.1.8 userspace arch: i386 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/fd59c3aee25f/disk-254f4963.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/2a93e1c819bd/vmlinux-254f4963.xz kernel image: https://storage.googleapis.com/syzbot-assets/18c05b34ca3c/bzImage-254f4963.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+ca7a2759caaa6cd4e3db@syzkaller.appspotmail.com Oops: divide error: 0000 [#1] SMP KASAN PTI CPU: 1 UID: 0 PID: 193 Comm: kworker/u8:6 Tainted: G L syzkaller #0 PREEMPT(full) Tainted: [L]=SOFTLOCKUP Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026 Workqueue: events_unbound cfg80211_wiphy_work RIP: 0010:mac80211_hwsim_link_info_changed+0x476/0xfc0 drivers/net/wireless/virtual/mac80211_hwsim.c:2734 Code: 3c 06 00 49 89 c6 48 8b 7c 24 20 74 0a e8 42 72 26 fb 48 8b 7c 24 20 48 8b 0f 89 ce 4c 89 e0 48 c1 e8 20 74 60 4c 89 e0 31 d2 <48> f7 f6 eb 5d e8 30 37 bb fa 4c 8b 74 24 20 49 8d 7e 10 e8 a2 e4 RSP: 0000:ffffc90002ea7860 EFLAGS: 00010246 RAX: 000650757bb12572 RBX: 0000000000000200 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff88806fbe7b98 RBP: ffffc90002ea7958 R08: ffffffff903096f7 R09: 1ffffffff20612de R10: dffffc0000000000 R11: fffffbfff20612df R12: 000650757bb12572 R13: ffff88806fbe7b18 R14: dffffc0000000000 R15: 1ffff920005d4f18 FS: 0000000000000000(0000) GS:ffff888125393000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000f540c000 CR3: 0000000064b3a000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 000000000000000e DR6: 00000000ffff0ff0 DR7: 0000000000000400 Call Trace: drv_link_info_changed+0x505/0x880 net/mac80211/driver-ops.c:-1 ieee80211_offchannel_return+0x375/0x500 net/mac80211/offchannel.c:160 __ieee80211_scan_completed+0x75a/0xb40 net/mac80211/scan.c:519 cfg80211_wiphy_work+0x2cf/0x460 net/wireless/core.c:513 process_one_work kernel/workqueue.c:3302 [inline] process_scheduled_works+0xb5d/0x1860 kernel/workqueue.c:3385 worker_thread+0xa53/0xfc0 kernel/workqueue.c:3466 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 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:mac80211_hwsim_link_info_changed+0x476/0xfc0 drivers/net/wireless/virtual/mac80211_hwsim.c:2734 Code: 3c 06 00 49 89 c6 48 8b 7c 24 20 74 0a e8 42 72 26 fb 48 8b 7c 24 20 48 8b 0f 89 ce 4c 89 e0 48 c1 e8 20 74 60 4c 89 e0 31 d2 <48> f7 f6 eb 5d e8 30 37 bb fa 4c 8b 74 24 20 49 8d 7e 10 e8 a2 e4 RSP: 0000:ffffc90002ea7860 EFLAGS: 00010246 RAX: 000650757bb12572 RBX: 0000000000000200 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff88806fbe7b98 RBP: ffffc90002ea7958 R08: ffffffff903096f7 R09: 1ffffffff20612de R10: dffffc0000000000 R11: fffffbfff20612df R12: 000650757bb12572 R13: ffff88806fbe7b18 R14: dffffc0000000000 R15: 1ffff920005d4f18 FS: 0000000000000000(0000) GS:ffff888125393000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000f7487a54 CR3: 00000000608c4000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 000000000000000e DR6: 00000000ffff0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess), 3 bytes skipped: 0: 49 89 c6 mov %rax,%r14 3: 48 8b 7c 24 20 mov 0x20(%rsp),%rdi 8: 74 0a je 0x14 a: e8 42 72 26 fb call 0xfb267251 f: 48 8b 7c 24 20 mov 0x20(%rsp),%rdi 14: 48 8b 0f mov (%rdi),%rcx 17: 89 ce mov %ecx,%esi 19: 4c 89 e0 mov %r12,%rax 1c: 48 c1 e8 20 shr $0x20,%rax 20: 74 60 je 0x82 22: 4c 89 e0 mov %r12,%rax 25: 31 d2 xor %edx,%edx * 27: 48 f7 f6 div %rsi <-- trapping instruction 2a: eb 5d jmp 0x89 2c: e8 30 37 bb fa call 0xfabb3761 31: 4c 8b 74 24 20 mov 0x20(%rsp),%r14 36: 49 8d 7e 10 lea 0x10(%r14),%rdi 3a: e8 .byte 0xe8 3b: a2 .byte 0xa2 3c: e4 .byte 0xe4 --- 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