From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-il1-f208.google.com (mail-il1-f208.google.com [209.85.166.208]) (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 6B0B91E7C0A for ; Fri, 21 Feb 2025 16:28:25 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.166.208 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1740155307; cv=none; b=lcJ8aRmJW+jCW48QNCY2VuqYYHNlokpakoBqSib4uzuBYcAlklKn5hRvEIYJKVf7qQGsUWWLqQmbhnganA2iG3592gkRMG00kULZ9NNTGyyXjGVfm7ca85Z0nRD6C36efYnelEpcCTCT4/5wO9aR2QDpVJrkNZAlpAMCwFVJU0s= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1740155307; c=relaxed/simple; bh=IFyRaxnksTikEg16zT4m0PF1U2wjeedNFQ74L2w/DFk=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=FP8I0xYka645aMSNCFUDAJVzOxEVH42rHMKEcePQIePNSPwFWuHlnt50G7W7nzBVPlAmC7rh0YOq8XuEXZeoSzizB9rPCpjiCMNbjLAnHqVU8PPEvKs/tTDdfyip3HCjWIw6BOXr2AWSyH7zErwkHhY9q1oyMZVmSl8nY4mlY3o= 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=209.85.166.208 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-f208.google.com with SMTP id e9e14a558f8ab-3d2a379bbf0so38530145ab.1 for ; Fri, 21 Feb 2025 08:28:25 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1740155304; x=1740760104; h=to:from:subject:message-id:date:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=P4FIgKAJ8qW9otoz+L0WcUkpV//3BW026ovT2i8giEs=; b=k8KqQOaMvVClpB54zFSacnLTYMs0OKnnkKT/HQp7Bkgxpsq0M8C4ocwyMUi/Eix1Gx pQo1nrECDvUy5I17kUjGBQ30m/hMCFrxPPlmSRzoNXPNI0iCp2dL94q/fFxRlOH6oaVS aXHQZ9lG7UnxUKv88rAfclIGxQ0HuDWp1pupkfod6g4IW92AKqbbvh3E2S7GULbOmaS5 STfnWSbkOmeSqw1aHK7TzRbPI2NC0Bca4BIoPzqal9u4DICcn5OBWDKjqhd8Fpc1E8yx Js7Cf2ioSkDk8aiFpejbdIQX/CtCefVt5cYsmdqIQLpBrYPH/3F8AF0mRKGD8yDjOY+7 AwNQ== X-Forwarded-Encrypted: i=1; AJvYcCVOnOWlL6q/IPsVOAh9NwLlz62O1mN3kL9Ey20t1kNz3Kbun0/NdA/hz0Z2c+G7YQ1swVf5mQMU9A3F2g==@vger.kernel.org X-Gm-Message-State: AOJu0YxyL9hOHrEb/3jXpe8KU7+ND3Jc/b/NubRXHLefiOgjIIn8vPBe H527+U32qSDNPdMP8vIcPNDQEyaJ82lSITrB2/4Z8fpb6Tot/qiQBV5NbhlkLDpjjEypx/m5lQM WmgFCasbi7srg2UEL7OUUUVcpEytrapuFntflHgCWgU2dZ51eMpVB3vA= X-Google-Smtp-Source: AGHT+IFzSCoq9Rb6XF3wKptknxyMCMA8A3eEbLAggswhPSjJOQZlLSrz6TFBd2rW+kYqDSOrxuco9ku6mEMtMA2I/D1xVOEg86OK Precedence: bulk X-Mailing-List: linux-btrfs@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6e02:1526:b0:3d0:4a82:3f43 with SMTP id e9e14a558f8ab-3d2cb43281cmr37014775ab.5.1740155304493; Fri, 21 Feb 2025 08:28:24 -0800 (PST) Date: Fri, 21 Feb 2025 08:28:24 -0800 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <67b8a9a8.050a0220.14d86d.057a.GAE@google.com> Subject: [syzbot] [btrfs?] kernel BUG in btrfs_free_fs_info (2) From: syzbot To: clm@fb.com, dsterba@suse.com, josef@toxicpanda.com, linux-btrfs@vger.kernel.org, linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: 0ad2507d5d93 Linux 6.14-rc3 git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=179ae898580000 kernel config: https://syzkaller.appspot.com/x/.config?x=6cc40dfe827ffb85 dashboard link: https://syzkaller.appspot.com/bug?extid=bbbdd6d6efbfc5174561 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/6bb4d4755dce/disk-0ad2507d.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/57594e8f74d9/vmlinux-0ad2507d.xz kernel image: https://storage.googleapis.com/syzbot-assets/a4f2442a20b1/bzImage-0ad2507d.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+bbbdd6d6efbfc5174561@syzkaller.appspotmail.com assertion failed: percpu_counter_sum_positive(em_counter) == 0, in fs/btrfs/disk-io.c:1266 ------------[ cut here ]------------ kernel BUG at fs/btrfs/disk-io.c:1266! Oops: invalid opcode: 0000 [#1] PREEMPT SMP KASAN PTI CPU: 1 UID: 0 PID: 5826 Comm: syz-executor Not tainted 6.14.0-rc3-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024 RIP: 0010:btrfs_free_fs_info+0x35c/0x360 fs/btrfs/disk-io.c:1266 Code: e9 89 00 20 fe e8 74 f4 dc fd 48 c7 c7 80 2a 6c 8c 48 c7 c6 c0 30 6c 8c 48 c7 c2 00 2b 6c 8c b9 f2 04 00 00 e8 75 3e 42 fd 90 <0f> 0b 66 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 66 0f RSP: 0018:ffffc900041d7d50 EFLAGS: 00010246 RAX: 000000000000005a RBX: 0000000000000004 RCX: 472f5d3ce77a5400 RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000 RBP: 0000000000000001 R08: ffffffff81a1102c R09: 1ffff9200083af44 R10: dffffc0000000000 R11: fffff5200083af45 R12: dffffc0000000000 R13: 1ffff11005ec2bc3 R14: ffff88807e594000 R15: ffff88807e595150 FS: 00005555839d1500(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055acae0e8160 CR3: 000000005f838000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: deactivate_locked_super+0xc4/0x130 fs/super.c:473 cleanup_mnt+0x41f/0x4b0 fs/namespace.c:1413 task_work_run+0x24f/0x310 kernel/task_work.c:227 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline] exit_to_user_mode_loop kernel/entry/common.c:114 [inline] exit_to_user_mode_prepare include/linux/entry-common.h:329 [inline] __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline] syscall_exit_to_user_mode+0x13f/0x340 kernel/entry/common.c:218 do_syscall_64+0x100/0x230 arch/x86/entry/common.c:89 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fbb69b8e117 Code: a8 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 0f 1f 44 00 00 31 f6 e9 09 00 00 00 66 0f 1f 84 00 00 00 00 00 b8 a6 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 01 c3 48 c7 c2 a8 ff ff ff f7 d8 64 89 02 b8 RSP: 002b:00007ffca0e02598 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6 RAX: 0000000000000000 RBX: 00007fbb69c0e08c RCX: 00007fbb69b8e117 RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffca0e02650 RBP: 00007ffca0e02650 R08: 0000000000000000 R09: 0000000000000000 R10: 00000000ffffffff R11: 0000000000000246 R12: 00007ffca0e036e0 R13: 00007fbb69c0e08c R14: 0000000000010d6a R15: 00007ffca0e03720 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:btrfs_free_fs_info+0x35c/0x360 fs/btrfs/disk-io.c:1266 Code: e9 89 00 20 fe e8 74 f4 dc fd 48 c7 c7 80 2a 6c 8c 48 c7 c6 c0 30 6c 8c 48 c7 c2 00 2b 6c 8c b9 f2 04 00 00 e8 75 3e 42 fd 90 <0f> 0b 66 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 66 0f RSP: 0018:ffffc900041d7d50 EFLAGS: 00010246 RAX: 000000000000005a RBX: 0000000000000004 RCX: 472f5d3ce77a5400 RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000 RBP: 0000000000000001 R08: ffffffff81a1102c R09: 1ffff9200083af44 R10: dffffc0000000000 R11: fffff5200083af45 R12: dffffc0000000000 R13: 1ffff11005ec2bc3 R14: ffff88807e594000 R15: ffff88807e595150 FS: 00005555839d1500(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fae2d970220 CR3: 000000005f838000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 --- 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