From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-io1-f72.google.com (mail-io1-f72.google.com [209.85.166.72]) (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 5060618B492 for ; Sat, 16 Nov 2024 13:13:24 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.166.72 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1731762805; cv=none; b=bUCluNJUFeOnu6Ue8Ci0m4nqr1wFWgMk7ys5K+1FgsMdqt8K3bMIEgQBlWbo3bZNn747IV9hGGDjaD3s7FY4nFgnd4f5VY+Fbj4sJONS1GH9/832g+jeLT8kDntTinC4nc/E1otWYDGOfXEvgQicthkpFipmJlkEPmrABmA6Ay8= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1731762805; c=relaxed/simple; bh=HmIJf5oq0Ta9gbPSfpdKvplD9gOOwXRsb1Ne99WGRnc=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=Mm85jl3uQJXlvqb2r/uwCBt5hKONwAHCIAOLxrCNqzq5mOWVnx7mALVnHh+ntgK6NgY8gTNU1mKUqWHP36pkzJDsGS5ISqhCC+TE6D8+78jkbVFd0Lh+6fGGHRDghBjQcOtu9zra1MQKzS9YGNotN4BT+Bhyi+Eoe0eNNXlnjrc= 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=209.85.166.72 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-f72.google.com with SMTP id ca18e2360f4ac-83dff8bc954so277360439f.1 for ; Sat, 16 Nov 2024 05:13:24 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1731762803; x=1732367603; h=to:from:subject:message-id:date:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=ABsb/moOV6pCjySDHZbyYwJBpCe4I9gMuXMFEMDpgZg=; b=Xcu5FruFr0bli76RvKwBXPtVGZLTeRxaJ5wYbQSDjD+WXqrESxEx49TEuB7ypKBOa3 fa5G6IR3kqIfkIBEFx9/bLlwiFUrSXoUbehGmgDCYg1u86ElZcrITur0urOcE/qNLvi1 jgCzAh/cKQ1Wk8lZNo1PxhF6cqWWe+yCS1QKX754xQ/ekrNuvr9eBlWCblH/M0qHtM1X gGGIFziLsE2fEVJAKPdqzD7RhUsa92AE5TVL0wFHLfFSvLocRmekpstJzoGevf2NvAjj uregKKAYtrikeeaAQFNa0E1aN3UwG/8VuEpofVafI0rVTL0JHb4H5oy+9f4thzdvgHKO du2w== X-Forwarded-Encrypted: i=1; AJvYcCVq9l6ypF1aBETZVeieHjXqJjSPHCSAJyMMue1nU6Q/UHI9wezK9nqymzOYSlqxAkvY6V3DvlOtO7cL5+g=@vger.kernel.org X-Gm-Message-State: AOJu0YyIEsV3Fks/BLHj9mIwons4/iz0C/+foLPAHPc+P39Tq9P0kcYU O3W4lNYaBifeLvv03ZTBdrgLIyYIw5RKKQc0HqLq/yivz2nkDxvZvCQWoA1cvwUe9XKiMnVhWS1 CDIdPVgje7dlXyldNvEodGdALhkNLvKSaD2WMYjgftAb7S7BuBpVtItE= X-Google-Smtp-Source: AGHT+IHWhev16VILb5Y75Z+PMmUrYfwmu2wKvXzc/BlWClFJuE51ISU9lEJjKfGDegpW2dMWFHXrzGjnWwVwhxrrqxtGWXkcGwk0 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6e02:12c4:b0:3a1:f549:7272 with SMTP id e9e14a558f8ab-3a7480a0777mr57715705ab.23.1731762803512; Sat, 16 Nov 2024 05:13:23 -0800 (PST) Date: Sat, 16 Nov 2024 05:13:23 -0800 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <67389a73.050a0220.bb738.000a.GAE@google.com> Subject: [syzbot] [bluetooth?] KMSAN: uninit-value in hci_cmd_complete_evt From: syzbot To: johan.hedberg@gmail.com, linux-bluetooth@vger.kernel.org, linux-kernel@vger.kernel.org, luiz.dentz@gmail.com, marcel@holtmann.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: 2d5404caa8c7 Linux 6.12-rc7 git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=1357fe30580000 kernel config: https://syzkaller.appspot.com/x/.config?x=dcca673786a14715 dashboard link: https://syzkaller.appspot.com/bug?extid=a9a4bedfca6aa9d7fa24 compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/a2910755fac8/disk-2d5404ca.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/a135257837ee/vmlinux-2d5404ca.xz kernel image: https://storage.googleapis.com/syzbot-assets/3f8930906164/bzImage-2d5404ca.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+a9a4bedfca6aa9d7fa24@syzkaller.appspotmail.com ===================================================== BUG: KMSAN: uninit-value in hci_cmd_complete_evt+0xd7b/0xeb0 net/bluetooth/hci_event.c:4221 hci_cmd_complete_evt+0xd7b/0xeb0 net/bluetooth/hci_event.c:4221 hci_event_func net/bluetooth/hci_event.c:7440 [inline] hci_event_packet+0x11df/0x1c20 net/bluetooth/hci_event.c:7495 hci_rx_work+0x9d1/0x11f0 net/bluetooth/hci_core.c:4031 process_one_work kernel/workqueue.c:3229 [inline] process_scheduled_works+0xae0/0x1c40 kernel/workqueue.c:3310 worker_thread+0xea7/0x14f0 kernel/workqueue.c:3391 kthread+0x3e2/0x540 kernel/kthread.c:389 ret_from_fork+0x6d/0x90 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 Uninit was stored to memory at: hci_cmd_complete_evt+0xaf4/0xeb0 hci_event_func net/bluetooth/hci_event.c:7440 [inline] hci_event_packet+0x11df/0x1c20 net/bluetooth/hci_event.c:7495 hci_rx_work+0x9d1/0x11f0 net/bluetooth/hci_core.c:4031 process_one_work kernel/workqueue.c:3229 [inline] process_scheduled_works+0xae0/0x1c40 kernel/workqueue.c:3310 worker_thread+0xea7/0x14f0 kernel/workqueue.c:3391 kthread+0x3e2/0x540 kernel/kthread.c:389 ret_from_fork+0x6d/0x90 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 Uninit was created at: slab_post_alloc_hook mm/slub.c:4091 [inline] slab_alloc_node mm/slub.c:4134 [inline] kmem_cache_alloc_node_noprof+0x6bf/0xb80 mm/slub.c:4186 kmalloc_reserve+0x13d/0x4a0 net/core/skbuff.c:587 __alloc_skb+0x363/0x7b0 net/core/skbuff.c:678 alloc_skb include/linux/skbuff.h:1322 [inline] bt_skb_alloc include/net/bluetooth/bluetooth.h:494 [inline] vhci_get_user drivers/bluetooth/hci_vhci.c:487 [inline] vhci_write+0x127/0x900 drivers/bluetooth/hci_vhci.c:607 new_sync_write fs/read_write.c:590 [inline] vfs_write+0xb2b/0x1540 fs/read_write.c:683 ksys_write+0x24f/0x4c0 fs/read_write.c:736 __do_sys_write fs/read_write.c:748 [inline] __se_sys_write fs/read_write.c:745 [inline] __x64_sys_write+0x93/0xe0 fs/read_write.c:745 x64_sys_call+0x306a/0x3ba0 arch/x86/include/generated/asm/syscalls_64.h:2 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcd/0x1e0 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f CPU: 0 UID: 0 PID: 5791 Comm: kworker/u9:2 Not tainted 6.12.0-rc7-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/30/2024 Workqueue: hci1 hci_rx_work ===================================================== --- 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