From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-il1-f200.google.com (mail-il1-f200.google.com [209.85.166.200]) (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 05DE7140384 for ; Tue, 23 Jul 2024 21:07:21 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.166.200 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1721768843; cv=none; b=a4k8d836KaHO902NfgloydhDe65IBWY7QBPB4c8wQKCc4AEJoDStaw2IF74+bedDjpUowCiiYOf3/LbwtCkVwPn+3SkoDEVpWeeI05vNd/olbzfRAEF7/nh3CE5X12hTowHsGPHHX7UHssXpNmSNAVmhQsWrCPrMwIRmhQuF+Yw= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1721768843; c=relaxed/simple; bh=685U6xRrk9Niks7TMgxDEgbUAvN4igfvtzi3ttrZAVc=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=HOR10aLLXV2BRuHJtydO4ZTqxM1rB/O1nl6xzWHiLMIuZawVy+Ut2ZPAgxCqSc8aVS8Wylq56sIIt89icKQ00lzFGOUoAXTdQoYReBiFYrAkLNdAxd91qlRObBWiVOH6TRMQGUQ9nTuhy6MQNrXYDIphJ3P9/R8ujs4R3o1MP/Q= 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=209.85.166.200 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-il1-f200.google.com with SMTP id e9e14a558f8ab-396fa3fe46cso94049205ab.0 for ; Tue, 23 Jul 2024 14:07:21 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1721768841; x=1722373641; h=to:from:subject:message-id:date:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=oKV5entdyuyqCkhse82tfmI5Y8Iw8p8fgLMn5aF7LYY=; b=kNjOyksdAHOeR7SPo0kP+JrJwzByzvsJM5dCbtclAWVRCSK2zdnbaXqbrvK9y3ctnA biaRvdk0Wo+gMPtUOgCl/pZGFEuBUU5OF4uvZGjprs0gH9lQpC611kHF9rFVwlgoa8fG wp7m+YcO8ZQcb+3/i4Bx71rumK69uBN2DPFwiOdjDFqBah3/En4tH82/0JVNI3taw+oG 9GSvu0w8dr6zVyL698xWsYiu2A4+I4tp0z+G23EhCOaQKr7uAU1j0EmUamZcdGtqnfRQ eRFgEHpWnk6twwLIp+51rKuBBDKA8RIa3cPCifA/YdeHwYkSBwOHKkuKLL08psUUhbz2 SB4w== X-Forwarded-Encrypted: i=1; AJvYcCVCN02nu0dj9pfKRGmLvDtWkIWCI1UPxtCxEC0tKLWdYNjE4wg6wfEDaWqT79EoLXC76irN8Kp/u40SbdVGPghtOg9So+pcjoEXCFrp X-Gm-Message-State: AOJu0YyLbywg9b/5Wh3gckiFbLsLaj+RwE+u7fe1g/+WNMknz3WU9Z1y 9EL4hnegmpcaf/lLa9PeGUrqAMIHqggei3ASugXd4l6RCA6qwpnc5tTTlSpRbx1Qux8HPrC+9sk r0kCNCuJCZicH8ICMXGcXT1Srt2c5X7t3+6Lxm6bhu2fghFm/DDoxabg= X-Google-Smtp-Source: AGHT+IGOq8EnuxF1rGOzUtWxHbKmi2JXzjtZG9okOXvtLB9HPN2u675AX7s7VarmG0LWlBdKGL89eD3FO0hynT/rZyGv80d7trby Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6e02:1d82:b0:382:feb2:2117 with SMTP id e9e14a558f8ab-398e8b665f5mr4955245ab.6.1721768841150; Tue, 23 Jul 2024 14:07:21 -0700 (PDT) Date: Tue, 23 Jul 2024 14:07:21 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <00000000000029981d061df08c8d@google.com> Subject: [syzbot] [bluetooth?] KMSAN: uninit-value in hci_rx_work 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: 2c9b3512402e Merge tag 'for-linus' of git://git.kernel.org.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=12628cad980000 kernel config: https://syzkaller.appspot.com/x/.config?x=6bfb33a8ad10458f dashboard link: https://syzkaller.appspot.com/bug?extid=6ea290ba76d8c1eb1ac2 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/9593db3ad921/disk-2c9b3512.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/77c4ed0c2bb7/vmlinux-2c9b3512.xz kernel image: https://storage.googleapis.com/syzbot-assets/b1e492f9354b/bzImage-2c9b3512.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+6ea290ba76d8c1eb1ac2@syzkaller.appspotmail.com ===================================================== BUG: KMSAN: uninit-value in hci_scodata_packet net/bluetooth/hci_core.c:3835 [inline] BUG: KMSAN: uninit-value in hci_rx_work+0x10a8/0x1130 net/bluetooth/hci_core.c:4039 hci_scodata_packet net/bluetooth/hci_core.c:3835 [inline] hci_rx_work+0x10a8/0x1130 net/bluetooth/hci_core.c:4039 process_one_work kernel/workqueue.c:3231 [inline] process_scheduled_works+0xae0/0x1c40 kernel/workqueue.c:3312 worker_thread+0xea5/0x1520 kernel/workqueue.c:3390 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:3985 [inline] slab_alloc_node mm/slub.c:4028 [inline] kmem_cache_alloc_node_noprof+0x6bf/0xb80 mm/slub.c:4071 kmalloc_reserve+0x13d/0x4a0 net/core/skbuff.c:583 __alloc_skb+0x363/0x7b0 net/core/skbuff.c:674 alloc_skb include/linux/skbuff.h:1320 [inline] bt_skb_alloc include/net/bluetooth/bluetooth.h:493 [inline] vhci_get_user drivers/bluetooth/hci_vhci.c:489 [inline] vhci_write+0x128/0x910 drivers/bluetooth/hci_vhci.c:609 new_sync_write fs/read_write.c:497 [inline] vfs_write+0xb2f/0x1550 fs/read_write.c:590 ksys_write+0x20f/0x4c0 fs/read_write.c:643 __do_sys_write fs/read_write.c:655 [inline] __se_sys_write fs/read_write.c:652 [inline] __ia32_sys_write+0x91/0xe0 fs/read_write.c:652 ia32_sys_call+0x2e34/0x40d0 arch/x86/include/generated/asm/syscalls_32.h:5 do_syscall_32_irqs_on arch/x86/entry/common.c:165 [inline] __do_fast_syscall_32+0xb0/0x110 arch/x86/entry/common.c:386 do_fast_syscall_32+0x38/0x80 arch/x86/entry/common.c:411 do_SYSENTER_32+0x1f/0x30 arch/x86/entry/common.c:449 entry_SYSENTER_compat_after_hwframe+0x84/0x8e CPU: 1 PID: 5058 Comm: kworker/u9:6 Not tainted 6.10.0-syzkaller-11185-g2c9b3512402e #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024 Workqueue: hci3 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