From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-il1-f205.google.com (mail-il1-f205.google.com [209.85.166.205]) (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 6BAEE15383F for ; Fri, 31 May 2024 08:43:31 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.166.205 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1717145012; cv=none; b=Sk/5wphzorZ+MaEMANrNRUvQ5aGIrJcOeDGB0j22ob2HWgwN4kHfwI08s8ryGLXatMlcRXuofTmE7A8Nm275AUy/F5ovMb/4qwF5k3crxnrVBdsQHdF5RJ9Mfex/A7nobBMaMuHfrQK9YzSakm9b+N3euQlNNHR2Mmz71uQUHXo= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1717145012; c=relaxed/simple; bh=agPUhxW6soqUMyXYvSibS2RxfpN3ujFQ4lqCBq9F3Vw=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=M48yxAXrzCOcxDhWHummahkaVlLBzGWjQHFUBErZ+QdRW2b2yDjbAMq6re3E3NTTIBpvcJbfXT6NADaEiWJ7OXrxHYaHzxThKNT5KFcGKvRxxkrO1ZAnxqEemTxSEE6Q7suEqovQTj1XQ7IBJf3Dl+ZsI9swksbvrb8/ukvAjW4= 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=209.85.166.205 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-f205.google.com with SMTP id e9e14a558f8ab-373809cc942so21334195ab.2 for ; Fri, 31 May 2024 01:43:31 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1717145010; x=1717749810; h=to:from:subject:message-id:date:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=SmkQm0PNehAJCURi9HNibb8suumwIfxlJyp9F3gc+1M=; b=j5F2n4cJ6Wx9rLvRRLBiqc31zAOhtMUuP+SQYTtquag6sbxsQ2RV17xb4Tr5di98PF UNkMJVpvaXi5+kY/OCCe9qOpY0IIx3AEX/1JSsuWcaa9bRYmtC4tjK+9CUHFS4gzd2yM oa6WwgisVgE9YvNXqrD7Y7E06kOmnytUYnCjKIJqyh6iNUVietEAaf2cLut9FAEA/SBp cprJGzp1ROIv4mWyW0sOdmKHaq/2H1mUF+zwl1cAT/idApZU+smrD6sAc+5bCYe+NUfe 8o3nlyQfLUmDNhHb4gAQbZmctIGiqKFNeV/4oYNlXnwwGZYzhWC4R1R7J2gxIM13pMwu b7Cg== X-Forwarded-Encrypted: i=1; AJvYcCWQOXZO1hL9HLq3xjzrMQU5AoX8OQpfJahtKuHYAtexCbne5++5Y79ukj0NE3+/vHI9fXCtTdknzqG0EnwFvP1J9SDtrRy0RI8ulVqX+6g= X-Gm-Message-State: AOJu0YzWD6W1zJ+70Gva8U7rUGqmFpxFoELDTBTkidG6h7zu3bQJDotI 5yFkVI6ugij8O+K6yPbwedjVVythEr29vDaIYMpI4QfgCr1fsSZ1Hk3cgfuBaoEkwwVfOKHqMXj Ba3VNN46XSnmBKrXTUajOkHHhPiCGSw5+Ld5VPnlTcKwgTz12eAmExho= X-Google-Smtp-Source: AGHT+IEJ9W64so0BiCi3IrDjDGCcdUZETq7z0/a+2bklaRdKRU4svmNce05UUA5GcBSsTAGZHheySetDtKVRJyMzKD33tuSVXlQq Precedence: bulk X-Mailing-List: linux-bcachefs@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6e02:1e03:b0:36c:4c5b:ce1 with SMTP id e9e14a558f8ab-3748ba0b74dmr953845ab.5.1717145010631; Fri, 31 May 2024 01:43:30 -0700 (PDT) Date: Fri, 31 May 2024 01:43:30 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <0000000000006304400619bbfae2@google.com> Subject: [syzbot] [bcachefs?] INFO: task hung in bch2_copygc_stop From: syzbot To: bfoster@redhat.com, kent.overstreet@linux.dev, linux-bcachefs@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: e0cce98fe279 Merge tag 'tpmdd-next-6.10-rc2' of git://git... git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=1783e2fc980000 kernel config: https://syzkaller.appspot.com/x/.config?x=47d282ddffae809f dashboard link: https://syzkaller.appspot.com/bug?extid=c6fd966ebbdea1e8ff08 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/830865207351/disk-e0cce98f.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/2b2afbee0859/vmlinux-e0cce98f.xz kernel image: https://storage.googleapis.com/syzbot-assets/a2eaac9c0eb1/bzImage-e0cce98f.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+c6fd966ebbdea1e8ff08@syzkaller.appspotmail.com INFO: task syz-executor.0:28112 blocked for more than 143 seconds. Not tainted 6.10.0-rc1-syzkaller-00021-ge0cce98fe279 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.0 state:D stack:20592 pid:28112 tgid:28112 ppid:1 flags:0x00004006 Call Trace: context_switch kernel/sched/core.c:5408 [inline] __schedule+0x1796/0x49d0 kernel/sched/core.c:6745 __schedule_loop kernel/sched/core.c:6822 [inline] schedule+0x14b/0x320 kernel/sched/core.c:6837 schedule_timeout+0xb0/0x310 kernel/time/timer.c:2557 do_wait_for_common kernel/sched/completion.c:95 [inline] __wait_for_common kernel/sched/completion.c:116 [inline] wait_for_common kernel/sched/completion.c:127 [inline] wait_for_completion+0x355/0x620 kernel/sched/completion.c:148 kthread_stop+0x19e/0x630 kernel/kthread.c:710 bch2_copygc_stop+0x4f/0x150 fs/bcachefs/movinggc.c:399 __bch2_fs_read_only+0x47/0x430 fs/bcachefs/super.c:266 bch2_fs_read_only+0xb52/0x1210 fs/bcachefs/super.c:356 __bch2_fs_stop+0x105/0x540 fs/bcachefs/super.c:613 generic_shutdown_super+0x136/0x2d0 fs/super.c:642 bch2_kill_sb+0x41/0x50 fs/bcachefs/fs.c:2026 deactivate_locked_super+0xc4/0x130 fs/super.c:473 cleanup_mnt+0x41f/0x4b0 fs/namespace.c:1267 task_work_run+0x24f/0x310 kernel/task_work.c:180 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:328 [inline] __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline] syscall_exit_to_user_mode+0x168/0x370 kernel/entry/common.c:218 do_syscall_64+0x100/0x230 arch/x86/entry/common.c:89 --- 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