From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-io1-f80.google.com (mail-io1-f80.google.com [209.85.166.80]) (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 AB33C27BF76 for ; Fri, 11 Apr 2025 03:06:29 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.166.80 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1744340791; cv=none; b=eNPDkWBFUoOBTS5F0o77HscUW0eWEWcvpTzR8hcVQu36GECAxA62JhmwLuB5Pyxs9QK0EJSYH7BVJLi9a2NEKUiRhTI1vI/jMqOJ6cu5beYgZj3q+6WNTxEVvDs7XwAWZPTOsXWhbPPzAs5TZ3bsr6bRj8x5fl1lPfzsplTQza0= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1744340791; c=relaxed/simple; bh=MuWu9AUSQ1+1uSylGxd3T7Cf+OjRoDsOR58E90b4AgI=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=uVgP5WqVccX1tlwjz+97dlEgv9ibNZbBXncMYgIsl6+gGbu0OA97woyNnoHgOyJmbdvzOduW2RY8z7Zm310kOJpmGmPN6ZHlhjmpDoQ83XDEUPZZN62Rcmvncks7qhx7ReQggVTCcbJOKmpQYWg8F5RTaZi0Ia5SyJDSoVWJV0s= 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=209.85.166.80 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-io1-f80.google.com with SMTP id ca18e2360f4ac-85b3f480d86so142451539f.3 for ; Thu, 10 Apr 2025 20:06:29 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1744340789; x=1744945589; h=to:from:subject:message-id:date:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=Nvms1JaVVvcVzFNT1SNwDdqauS7cR0nPqFAyXLTYyU4=; b=ogaHYP6J3dm80NWspWETY/S3RysoEmL9fGU2U0sMnP65+1fPAWHMtknS7kqKzS3azU FW3Nj25gVIxs3m8a/sMocr+3UR5aNB935yx54cFpI9MS4dPhjfEZKfwUbWT9GNFlFXXA Cz7gsUHiJ/NZ0ykKk4eUvWTdi+ARp/b4Ybgv4EKZ5iPnBJEadtPo6oE4Wib7NYD2aQ5O xdayo0XgOPJ2H34CEqWbOLPY72HeTIazDiRa0VPP8V+YX5pOlD7fHb+Ax6wy0XvM2lj3 dqazYO5WFq4nsD7/YI1EjznSmID1m9B6QegOXa5rMzvMrH6IVjsPxqox5cyX0CQajdeH zGew== X-Forwarded-Encrypted: i=1; AJvYcCX3X9eBBDvPss5aOzeFgnmNWUMf5/VBegBBFoohRXWV2rxAdu7bkB2GGTVyTIa4cmo2EmNf15OxDGpSJAI=@vger.kernel.org X-Gm-Message-State: AOJu0YxykhgCn2azTCSX6MqkyyQmiOKmaG9v7ve00TUQyTMExQxZf9wQ p8MAcDLKlwA84JycPxD1oXXRhAIL8Cjgm2Q3Y/2GhkycjhTl2z52HiSgXoHqQ/Uvb8ngjkKhU+2 2yz3bxQrkC6O8qViv4PqzHfnhH5O77d6qriQUWYFxvpaIeSp86a2250I= X-Google-Smtp-Source: AGHT+IE8WDKXOhB70GjiVNV6AR9t2d6YxCElhdByaHvkDj95/MMR/d+yH5BAQtdR/OmE0MLtd7fS8WTr8gEoWZTqOzxkVSMWllOB Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a92:c245:0:b0:3d5:be65:34ac with SMTP id e9e14a558f8ab-3d7ec1dd513mr12454675ab.2.1744340788798; Thu, 10 Apr 2025 20:06:28 -0700 (PDT) Date: Thu, 10 Apr 2025 20:06:28 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <67f88734.050a0220.355867.001b.GAE@google.com> Subject: [syzbot] [wireless?] divide error in mac80211_hwsim_link_info_changed (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: 16cd1c265776 Merge tag 'timers-cleanups-2025-04-06' of git.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=14b1bd98580000 kernel config: https://syzkaller.appspot.com/x/.config?x=f2054704dd53fb80 dashboard link: https://syzkaller.appspot.com/bug?extid=5bb5f06f99924ea0cf86 compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 userspace arch: i386 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/20e7988b77fa/disk-16cd1c26.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/aca60f83d6d9/vmlinux-16cd1c26.xz kernel image: https://storage.googleapis.com/syzbot-assets/b56870bab231/bzImage-16cd1c26.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+5bb5f06f99924ea0cf86@syzkaller.appspotmail.com Oops: divide error: 0000 [#1] SMP KASAN PTI CPU: 1 UID: 0 PID: 12 Comm: kworker/u8:0 Not tainted 6.14.0-syzkaller-13546-g16cd1c265776 #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 Workqueue: events_unbound cfg80211_wiphy_work RIP: 0010:mac80211_hwsim_link_info_changed+0x42a/0xf10 drivers/net/wireless/virtual/mac80211_hwsim.c:2549 Code: 00 49 89 c5 74 08 4c 89 ff e8 22 25 cf fa 49 8b 0f 89 ce 48 89 d8 48 c1 e8 20 4c 8b 74 24 10 0f 84 18 01 00 00 48 89 d8 31 d2 <48> f7 f6 e9 11 01 00 00 e8 89 fb 64 fa eb 05 e8 82 fb 64 fa 4c 8d RSP: 0018:ffffc90000117700 EFLAGS: 00010246 RAX: 000632276c5d693b RBX: 000632276c5d693b RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000040 RBP: ffffc900001177f0 R08: ffffffff81b0eef1 R09: 1ffffffff20bfbee R10: dffffc0000000000 R11: ffffffff81624770 R12: 0000000000000200 R13: dffffc0000000000 R14: 1ffff92000022eec R15: ffff88807a30f040 FS: 0000000000000000(0000) GS:ffff888125096000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000008000579c CR3: 0000000068a92000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: drv_link_info_changed+0x53d/0x8b0 net/mac80211/driver-ops.c:-1 ieee80211_offchannel_return+0x3a4/0x530 net/mac80211/offchannel.c:160 __ieee80211_scan_completed+0x77f/0xb60 net/mac80211/scan.c:495 ieee80211_scan_work+0x1d6/0x1dd0 net/mac80211/scan.c:1162 cfg80211_wiphy_work+0x2f0/0x490 net/wireless/core.c:435 process_one_work kernel/workqueue.c:3238 [inline] process_scheduled_works+0xac3/0x18e0 kernel/workqueue.c:3319 worker_thread+0x870/0xd50 kernel/workqueue.c:3400 kthread+0x7b7/0x940 kernel/kthread.c:464 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:153 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+0x42a/0xf10 drivers/net/wireless/virtual/mac80211_hwsim.c:2549 Code: 00 49 89 c5 74 08 4c 89 ff e8 22 25 cf fa 49 8b 0f 89 ce 48 89 d8 48 c1 e8 20 4c 8b 74 24 10 0f 84 18 01 00 00 48 89 d8 31 d2 <48> f7 f6 e9 11 01 00 00 e8 89 fb 64 fa eb 05 e8 82 fb 64 fa 4c 8d RSP: 0018:ffffc90000117700 EFLAGS: 00010246 RAX: 000632276c5d693b RBX: 000632276c5d693b RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000040 RBP: ffffc900001177f0 R08: ffffffff81b0eef1 R09: 1ffffffff20bfbee R10: dffffc0000000000 R11: ffffffff81624770 R12: 0000000000000200 R13: dffffc0000000000 R14: 1ffff92000022eec R15: ffff88807a30f040 FS: 0000000000000000(0000) GS:ffff888125096000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000080065018 CR3: 000000005144e000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess), 1 bytes skipped: 0: 49 89 c5 mov %rax,%r13 3: 74 08 je 0xd 5: 4c 89 ff mov %r15,%rdi 8: e8 22 25 cf fa call 0xfacf252f d: 49 8b 0f mov (%r15),%rcx 10: 89 ce mov %ecx,%esi 12: 48 89 d8 mov %rbx,%rax 15: 48 c1 e8 20 shr $0x20,%rax 19: 4c 8b 74 24 10 mov 0x10(%rsp),%r14 1e: 0f 84 18 01 00 00 je 0x13c 24: 48 89 d8 mov %rbx,%rax 27: 31 d2 xor %edx,%edx * 29: 48 f7 f6 div %rsi <-- trapping instruction 2c: e9 11 01 00 00 jmp 0x142 31: e8 89 fb 64 fa call 0xfa64fbbf 36: eb 05 jmp 0x3d 38: e8 82 fb 64 fa call 0xfa64fbbf 3d: 4c rex.WR 3e: 8d .byte 0x8d --- 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