From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-oi1-f208.google.com (mail-oi1-f208.google.com [209.85.167.208]) (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 C111532D0DD for ; Thu, 15 Jan 2026 08:12:21 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.167.208 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1768464743; cv=none; b=m4PvVdUQ669NIXGwV3Ny13b12qL4kKM6i8I/QU7fletCr+f2w44WOBKoNWsLlVrcf4J85BZUgMfmT1UIdujfEUZ5s4m5puz3RPYRJ3Vjrn6ctRK2xs1C+EUTi2bET4ugg2mWj9kcPttyLBTCAdmZbT5uVnlovq2NZVu6bpuUOEM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1768464743; c=relaxed/simple; bh=Kt1aG1Qqw5udkt/U6jZYpTx751QM62eIRmLLRZQI5NI=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=KtGJz6XGRFBsUji3SNpOQTIFsPXGsbRMJEFcCSRd//n8+ss/Db5f+3I/tnRTje4UtzU2mCc4UVplhasHu5sg62to7oMlHKIJtkOQLTPV4Al8z6sFDx0KqDXxgGtDl1h7OU9e8FgXRnNKQyUjbkMo9dSoVwZd7CxpgXHzd2Wj+c4= 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=209.85.167.208 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-oi1-f208.google.com with SMTP id 5614622812f47-45c8a31b1fcso707653b6e.1 for ; Thu, 15 Jan 2026 00:12:21 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1768464740; x=1769069540; h=to:from:subject:message-id:date:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=rn1vd4KPJeuZ9DXDf74Guf7gmmsSPgatZ6FXXGUFuNM=; b=jmUaPhBatVgXDj2roEnGdIAtSc0j7z9OmzOuM9HBJJqAuw68vD7yVnv36h3GNo2pwS Lf7XdIiPk5eSQ+5cLyVPOT8O1FnN4nbtUSFqQToPsHDkY8CQPwt6rn5LnV2VjhIzjuiD Ge/wmj8qxG6W3G8TYxeF4Fo9BnOnbnF3RWqP3MRhfbuBjC4iCTFQJEpWu+1WIAzcpsP1 I/KuKeyC0+Hpsxl1rCQgqzA7VV5zQ+5x0WgUKz7sHeJZNEIFNpRtLSaYIG4wwOgNCRtU dMP/hJO0hME5DInO9zAfmtOeunWHzI6TFbtuvnHZ7Pct94gb1Yma6fcQC9EVE00ml4oa aR4Q== X-Forwarded-Encrypted: i=1; AJvYcCWZdiyV7jdY0wnNoYIeBYMwJrVM5jeram489p6eRDs3NhPUJ7zA8Icf5XZ9c51yqL5aVMl/iMnQVh0My9E=@vger.kernel.org X-Gm-Message-State: AOJu0YxVBKHbs0D9rw2nF8QXQ+cXqcUL9dqwqBi69kRb2mZiFr+EAPOX 9PupoPHeGHp04oJVTDWDVimCh2PfG1D/wAsqX87Wkn4Ntn/2Pcjbus1/RHF5jz6MaFaxow2SUzZ gFahLDvISlODxyOMiAyV+97hChVEyImY5pAbeCW05H4PzyMqKS9Me9Pry+m8= Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6808:1207:b0:455:7fe4:b229 with SMTP id 5614622812f47-45c714f27a7mr3084513b6e.53.1768464740707; Thu, 15 Jan 2026 00:12:20 -0800 (PST) Date: Thu, 15 Jan 2026 00:12:20 -0800 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6968a164.050a0220.58bed.0011.GAE@google.com> Subject: [syzbot] [iomap?] WARNING in ifs_free From: syzbot To: brauner@kernel.org, djwong@kernel.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, linux-xfs@vger.kernel.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: f417b7ffcbef Add linux-next specific files for 20260109 git tree: linux-next console output: https://syzkaller.appspot.com/x/log.txt?x=17e6943a580000 kernel config: https://syzkaller.appspot.com/x/.config?x=63a1fc1b4011ac76 dashboard link: https://syzkaller.appspot.com/bug?extid=d3a62bea0e61f9d121da compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/1f048080a918/disk-f417b7ff.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/dfd5ea190c96/vmlinux-f417b7ff.xz kernel image: https://storage.googleapis.com/syzbot-assets/db24c176e0df/bzImage-f417b7ff.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+d3a62bea0e61f9d121da@syzkaller.appspotmail.com ------------[ cut here ]------------ WARNING: fs/iomap/buffered-io.c:255 at ifs_free+0x358/0x420 fs/iomap/buffered-io.c:254, CPU#1: syz-executor/9813 Modules linked in: CPU: 1 UID: 0 PID: 9813 Comm: syz-executor Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 RIP: 0010:ifs_free+0x358/0x420 fs/iomap/buffered-io.c:254 Code: 41 5f 5d e9 aa ec c0 ff e8 05 d2 65 ff 90 0f 0b 90 e9 d0 fe ff ff e8 f7 d1 65 ff 90 0f 0b 90 e9 0a ff ff ff e8 e9 d1 65 ff 90 <0f> 0b 90 eb c3 44 89 e1 80 e1 07 80 c1 03 38 c1 0f 8c 06 fe ff ff RSP: 0018:ffffc90005287670 EFLAGS: 00010293 RAX: ffffffff825ae8d7 RBX: 0000000000000008 RCX: ffff88802f4c9e40 RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000000 RBP: 00000000825b5701 R08: ffffea0002bb5887 R09: 1ffffd4000576b10 R10: dffffc0000000000 R11: fffff94000576b11 R12: ffff8880202d0144 R13: ffff8880202d0100 R14: ffffea0002bb5880 R15: 1ffffd4000576b11 FS: 00005555773e5500(0000) GS:ffff888125d07000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f27239ff000 CR3: 0000000033afe000 CR4: 00000000003526f0 Call Trace: folio_invalidate mm/truncate.c:140 [inline] truncate_cleanup_folio+0x2d8/0x430 mm/truncate.c:160 truncate_inode_pages_range+0x233/0xd90 mm/truncate.c:404 ntfs_evict_inode+0x19/0x40 fs/ntfs3/inode.c:1799 evict+0x5f4/0xae0 fs/inode.c:837 dispose_list fs/inode.c:879 [inline] evict_inodes+0x753/0x7e0 fs/inode.c:933 generic_shutdown_super+0x9a/0x2c0 fs/super.c:628 kill_block_super+0x44/0x90 fs/super.c:1722 ntfs3_kill_sb+0x44/0x1c0 fs/ntfs3/super.c:1860 deactivate_locked_super+0xbc/0x130 fs/super.c:474 cleanup_mnt+0x425/0x4c0 fs/namespace.c:1312 task_work_run+0x1d4/0x260 kernel/task_work.c:233 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline] __exit_to_user_mode_loop kernel/entry/common.c:44 [inline] exit_to_user_mode_loop+0xef/0x4e0 kernel/entry/common.c:75 __exit_to_user_mode_prepare include/linux/irq-entry-common.h:226 [inline] syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:256 [inline] syscall_exit_to_user_mode_work include/linux/entry-common.h:159 [inline] syscall_exit_to_user_mode include/linux/entry-common.h:194 [inline] do_syscall_64+0x2c1/0xf80 arch/x86/entry/syscall_64.c:100 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fba68d90a77 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:00007ffc83b0f988 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6 RAX: 0000000000000000 RBX: 00007fba68e13d7d RCX: 00007fba68d90a77 RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffc83b0fa40 RBP: 00007ffc83b0fa40 R08: 0000000000000000 R09: 0000000000000000 R10: 00000000ffffffff R11: 0000000000000246 R12: 00007ffc83b10ad0 R13: 00007fba68e13d7d R14: 0000000000069557 R15: 00007ffc83b10b10 --- 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