From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-io1-f79.google.com (mail-io1-f79.google.com [209.85.166.79]) (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 F226954670 for ; Wed, 29 May 2024 15:24:32 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.166.79 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1716996274; cv=none; b=c5cvoIkhO4bCCp4J3Q3ppc/kT0PvHr8ifoEpSGKV3VN+CzwNwdX4yRUFtmsWj0DOecQuVVgkdhldwHQOXTs7WHEwDJGt+3NQ3Y1QTXGUYKM8a0yxi6hZgouZIeogpUR+PBbghokb8wu4CRf6vbcVPnGpLCkIxyHFVmdUSGnwSxE= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1716996274; c=relaxed/simple; bh=gR0NR/W1POMlud6zuz0vhVTDnOnvRmP3UrY+oEDtI3g=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=ChtqjM1DBrVqmQATACGTnOoblWp+Iq76ub5h52Woh9raYjQ4+4NC6VH1isQBJXBmEt8lXiOuRGCHvPbyG8HYeWE62Klk/afImxrUihU9iCp+j5pxAWQ9REZGC+8lBVDl+NL4MlcNGdo3UYoB12+mm/ycMI6FEtVHHdIZSZkAzPs= 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=209.85.166.79 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-f79.google.com with SMTP id ca18e2360f4ac-7eaccb5a928so246125339f.3 for ; Wed, 29 May 2024 08:24:32 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1716996272; x=1717601072; h=to:from:subject:message-id:date:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=S7PgD150ZW6PXwRjk11mPZpnSNlflnT2YoZOVl9KBTE=; b=LESMzgoKfxwI6de/6CHvRgCzsnOziFxiDTga6zwkIyemRYyHRjPChzp4AbUCeiRqHm NxdfcD48Xvf9KzNhbcSlBV9BjjPHia+jp3Cm1FOJl10LkaUqIvrTKcn1BmeIRUxLYBUH uzfdFtP+hBq5cBJwxP4hTj0vaBeTkGKSClPsrejfIAeVHNh1ykGClUrX7zvJQ5Gj7aZE tvUowMuQAhsh5jXb21Dj3if7zLfffy6z5pnwtWZujP/45BGhRnIA4cGWd+v58PHCvVx4 1+/CWM/KaEeY/VBDMmfCyJ57+gUxPr1ocpju+ER4yPQVn9y1xV0EuWFVyrTDz2oV4FfA QVkw== X-Forwarded-Encrypted: i=1; AJvYcCWVTBXmpbirb15IhzWXUuh2qlXn5pW3utiYqgo9E0t8IN2cP9nzevqltx9qUlM5pgQvFNXAgnucmhvQOcTRfI9DZD1l6mDtq4DJqLQ= X-Gm-Message-State: AOJu0Yyuwb9mbJwK213OsOsNtET4t00LfMNsP/pzyngQvKvK0Znzxf43 4Tp6dNglJRxRs/ZXAeBLenxpjZS8k2uwLQrUYvkILJtQBF1ANDSazCTndMni4tbzJFzW9eRrch6 1tv1ZpXG6GYl9OUHd5RliA7FRgDpKrfT02dzSHUH8epL/9WWPE6uSr3U= X-Google-Smtp-Source: AGHT+IFlKz8QNaJRUpPZQhyOOBuMXKZXEXbuQQNrR24eq0OlB/Cr+M+JD+pmsFrLUnjVmmMNq+KGZt+/psZN+CS0dYUNcW+r5hRx Precedence: bulk X-Mailing-List: linux-btrfs@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6638:4c86:b0:488:75e3:f3c1 with SMTP id 8926c6da1cb9f-4b03f171269mr329972173.0.1716996272152; Wed, 29 May 2024 08:24:32 -0700 (PDT) Date: Wed, 29 May 2024 08:24:32 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000e1f2bd0619995892@google.com> Subject: [syzbot] [btrfs?] kernel BUG in btrfs_free_fs_info 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: 56fb6f92854f Merge tag 'drm-next-2024-05-25' of https://gi.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=15874672980000 kernel config: https://syzkaller.appspot.com/x/.config?x=2b8d1faad9ceb620 dashboard link: https://syzkaller.appspot.com/bug?extid=2f3cc5860d147a83eb3d compiler: gcc (Debian 12.2.0-14) 12.2.0, 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 (non-bootable): https://storage.googleapis.com/syzbot-assets/7bc7510fe41f/non_bootable_disk-56fb6f92.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/65ffe3ca9bb3/vmlinux-56fb6f92.xz kernel image: https://storage.googleapis.com/syzbot-assets/354ef77a71b6/bzImage-56fb6f92.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+2f3cc5860d147a83eb3d@syzkaller.appspotmail.com assertion failed: percpu_counter_sum_positive(em_counter) == 0, in fs/btrfs/disk-io.c:1274 ------------[ cut here ]------------ kernel BUG at fs/btrfs/disk-io.c:1274! Oops: invalid opcode: 0000 [#1] PREEMPT SMP KASAN NOPTI CPU: 0 PID: 5236 Comm: syz-executor.3 Not tainted 6.9.0-syzkaller-12277-g56fb6f92854f #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014 RIP: 0010:btrfs_free_fs_info+0x3c6/0x470 fs/btrfs/disk-io.c:1274 Code: e9 df 19 42 fe e8 0a b0 03 fe b9 fa 04 00 00 48 c7 c2 80 99 76 8b 48 c7 c6 20 ab 76 8b 48 c7 c7 00 9a 76 8b e8 fb 4d e4 fd 90 <0f> 0b e8 23 e2 60 fe e9 60 fd ff ff e8 19 e2 60 fe e9 02 fd ff ff RSP: 0018:ffffc90002bdfda8 EFLAGS: 00010286 RAX: 000000000000005a RBX: 0000000000000001 RCX: ffffffff816f3159 RDX: 0000000000000000 RSI: ffffffff816fbd56 RDI: 0000000000000005 RBP: ffff88805a888000 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000080000000 R11: 0000000000000000 R12: ffff88805a8890f0 R13: ffff888057ba1a40 R14: ffffed1003fcaa3d R15: ffff888057ba1a80 FS: 0000000000000000(0000) GS:ffff88802c000000(0063) knlGS:0000000057e98400 CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 CR2: 00000000f7384414 CR3: 0000000057b96000 CR4: 0000000000350ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: deactivate_locked_super+0xbe/0x1a0 fs/super.c:473 deactivate_super+0xde/0x100 fs/super.c:506 cleanup_mnt+0x222/0x450 fs/namespace.c:1267 task_work_run+0x14e/0x250 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+0x278/0x2a0 kernel/entry/common.c:218 __do_fast_syscall_32+0x80/0x120 arch/x86/entry/common.c:389 do_fast_syscall_32+0x32/0x80 arch/x86/entry/common.c:411 entry_SYSENTER_compat_after_hwframe+0x84/0x8e RIP: 0023:0xf731f579 Code: b8 01 10 06 03 74 b4 01 10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 00 00 00 00 00 00 00 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 8d b4 26 00 00 00 00 8d b4 26 00 00 00 00 RSP: 002b:00000000ff9328c8 EFLAGS: 00000292 ORIG_RAX: 0000000000000034 RAX: 0000000000000000 RBX: 00000000ff932970 RCX: 0000000000000009 RDX: 00000000f7475ff4 RSI: 00000000f73c6361 RDI: 00000000ff933a14 RBP: 00000000ff932970 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000296 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:btrfs_free_fs_info+0x3c6/0x470 fs/btrfs/disk-io.c:1274 Code: e9 df 19 42 fe e8 0a b0 03 fe b9 fa 04 00 00 48 c7 c2 80 99 76 8b 48 c7 c6 20 ab 76 8b 48 c7 c7 00 9a 76 8b e8 fb 4d e4 fd 90 <0f> 0b e8 23 e2 60 fe e9 60 fd ff ff e8 19 e2 60 fe e9 02 fd ff ff RSP: 0018:ffffc90002bdfda8 EFLAGS: 00010286 RAX: 000000000000005a RBX: 0000000000000001 RCX: ffffffff816f3159 RDX: 0000000000000000 RSI: ffffffff816fbd56 RDI: 0000000000000005 RBP: ffff88805a888000 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000080000000 R11: 0000000000000000 R12: ffff88805a8890f0 R13: ffff888057ba1a40 R14: ffffed1003fcaa3d R15: ffff888057ba1a80 FS: 0000000000000000(0000) GS:ffff88802c100000(0063) knlGS:0000000057e98400 CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 CR2: 000055bc24d74268 CR3: 0000000057b96000 CR4: 0000000000350ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess), 2 bytes skipped: 0: 10 06 adc %al,(%rsi) 2: 03 74 b4 01 add 0x1(%rsp,%rsi,4),%esi 6: 10 07 adc %al,(%rdi) 8: 03 74 b0 01 add 0x1(%rax,%rsi,4),%esi c: 10 08 adc %cl,(%rax) e: 03 74 d8 01 add 0x1(%rax,%rbx,8),%esi 1e: 00 51 52 add %dl,0x52(%rcx) 21: 55 push %rbp 22: 89 e5 mov %esp,%ebp 24: 0f 34 sysenter 26: cd 80 int $0x80 * 28: 5d pop %rbp <-- trapping instruction 29: 5a pop %rdx 2a: 59 pop %rcx 2b: c3 ret 2c: 90 nop 2d: 90 nop 2e: 90 nop 2f: 90 nop 30: 8d b4 26 00 00 00 00 lea 0x0(%rsi,%riz,1),%esi 37: 8d b4 26 00 00 00 00 lea 0x0(%rsi,%riz,1),%esi --- 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