From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-oi1-f198.google.com (mail-oi1-f198.google.com [209.85.167.198]) (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 C84D640DB5B for ; Sat, 26 Sep 2026 14:54:34 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.167.198 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1790434476; cv=none; b=FR0Hsv4+P8bT73taLFibcSbD8PAdsgTYPbyHkMRJNpDM67a5PV+Y3my0eCBFYMznOaWJYlFtUNEa/XToGVVB5X8rPCstZ81CD1wn99T/hAm1iIFz193+SSIu5IIC1YiLgjXRrx9S2RaDRjpdVatBse4GSiVOviG9+P5BBR+2fT0= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1790434476; c=relaxed/simple; bh=wpoe2NbyDw8UDfaaqOWcUSlSP/xT09RLX4P5/7CZaJk=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=NLJRla6QulOfalq7uhyxb/whiQ1YPKtL0SE8om4oTRq5EZQ+Xb5UgsuZlisXKK9YgPJJ+7f6wuN/9yGzuTQO7R3v8YGv31XpLY4ZlslDU0TWAPEEdjX83QilvhQPMpfsaHOvqlSb5R2Dg7N5jgRC/fo0EoAq57oTKD4VE8Wh3b4= 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=209.85.167.198 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-f198.google.com with SMTP id 5614622812f47-4b28dafb8e1so3373690b6e.2 for ; Sat, 26 Sep 2026 07:54:34 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20260707; t=1790434473; x=1791039273; h=content-type:to:from:subject:message-id:date:mime-version :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to :content-type; bh=0ahls61jkZLVMkVh3QQjBqgRuSrPo5tBwRCH8iAs3so=; b=SpIYR3QbmIQDvXlfnpKKbCd1g8rMIz4wQFiW+Hl0YdogPC1uLx/Gx6BJKIMuM1vO40 Kj051YuXjI+MnGS0f1feLVy/Mi+TIUrfaOXeDNhJbEW/nn0p6pcX7Pz2w+1cMERenswi Cnn4b5iWne3Ylkc50EMgVj0m0+qRFSODVNeInkgohQO2V8ok+vOFAgF8PgXulKxViM7v u/agP1FR39+tvt5eCjHhxaLSI/kf7BnXeN5FaFyaJdxQ2rlLleGgV7EzIITh9lrEbKHr Mub1KMOaIOwaV7rXTjZdqztfAqR5CCFHEqjchqJLLf3u9e+j1JK8dL/r/ItFa2lPtdke AstA== X-Forwarded-Encrypted: i=1; AKwUvBzObFnuYPRIKVforNnwLNRXNdBob8//m2U2rLhB1AX2f1ooOk2WT0+Opl/ZAaKQuSu5k1tVQ3Jg8aZjqmM=@vger.kernel.org X-Gm-Message-State: AFuF++kD4mqOBWIFXTMemDWmieErFk39U6hczhnNrFk7DZ2QJkU7c4iX LeN5OocDFqxCYpD0gZzV4OxRvaVrnkVLA/WVW6gc39i4Hylp00JbY1CLn9Im2uDA1Z9+bEadIZp yeJAyqShYjm4QD1T7R8m0aQbST3ZbiN2TgwE1RilgnuHo6atM+/4Rj6T8h2Y= Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6808:1703:b0:4c2:d7e8:cf67 with SMTP id 5614622812f47-4d72c73d035mr8014457b6e.24.1790434473688; Sat, 26 Sep 2026 07:54:33 -0700 (PDT) Date: Sat, 26 Sep 2026 07:54:33 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6ab7dca9.80e1c6cc.1e8e5f.0046.GAE@google.com> Subject: [syzbot] [fuse?] WARNING in fuse_iomap_writeback_range From: syzbot To: fuse-devel@lists.linux.dev, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, miklos@szeredi.hu, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: f0100363d8c3 Merge tag 'xfs-fixes-7.3-rc5' of gitolite.ker.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=1774b805580000 kernel config: https://syzkaller.appspot.com/x/.config?x=9d4242cb1c54cdf7 dashboard link: https://syzkaller.appspot.com/bug?extid=e8200299b0556976e13c compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/c3a75fc0731f/disk-f0100363.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/0cc808123f1b/vmlinux-f0100363.xz kernel image: https://storage.googleapis.com/syzbot-assets/a0fc6abfffe3/bzImage-f0100363.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+e8200299b0556976e13c@syzkaller.appspotmail.com ------------[ cut here ]------------ !ff WARNING: fs/fuse/file.c:2043 at fuse_write_file_get fs/fuse/file.c:2043 [inline], CPU#0: syz.6.4727/24915 WARNING: fs/fuse/file.c:2043 at fuse_iomap_writeback_range+0x7c8/0x18f0 fs/fuse/file.c:2227, CPU#0: syz.6.4727/24915 Modules linked in: CPU: 0 UID: 0 PID: 24915 Comm: syz.6.4727 Tainted: G L syzkaller #0 PREEMPT(full) Tainted: [L]=SOFTLOCKUP Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026 RIP: 0010:fuse_write_file_get fs/fuse/file.c:2043 [inline] RIP: 0010:fuse_iomap_writeback_range+0x7c8/0x18f0 fs/fuse/file.c:2227 Code: fe 48 83 3b 00 74 5b e8 16 00 6d fe 4c 8b 3c 24 e9 08 0b 00 00 e8 08 00 6d fe eb 5c e8 01 00 6d fe 4c 89 f7 e8 69 c2 8d 08 90 <0f> 0b 90 48 b8 00 00 00 00 00 fc ff df 48 8b 4c 24 58 80 3c 01 00 RSP: 0018:ffffc9000738f2b8 EFLAGS: 00010286 RAX: 8000000000000000 RBX: ffff888057eb0d80 RCX: ffffffff9a9e9501 RDX: 0000000000000001 RSI: 0000000000000004 RDI: 00000000ffffffff RBP: 0000000000001000 R08: ffff888057eb1363 R09: 1ffff1100afd626c R10: dffffc0000000000 R11: ffffed100afd626d R12: ffff888057eb1208 R13: 0000000000001000 R14: ffff888057eb1360 R15: ffff888057eb1208 FS: 00007fc6e84ad6c0(0000) GS:ffff888124ccb000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f22f05eb840 CR3: 000000007d23c000 CR4: 00000000003526f0 DR0: 0000000000000008 DR1: 0000000000000002 DR2: 0000000000000404 DR3: ffffffffefffff14 DR6: 00000000ffff0ff0 DR7: 0000000000000400 Call Trace: iomap_writeback_range fs/iomap/buffered-io.c:1896 [inline] iomap_writeback_folio+0x1526/0x2490 fs/iomap/buffered-io.c:2022 fuse_launder_folio+0x17b/0x240 fs/fuse/file.c:2331 folio_launder mm/truncate.c:612 [inline] folio_unmap_invalidate+0x4cd/0x830 mm/truncate.c:634 invalidate_inode_pages2_range+0x629/0xb30 mm/truncate.c:726 fuse_open+0x5a6/0x770 fs/fuse/file.c:297 do_dentry_open+0x816/0x1380 fs/open.c:996 vfs_open+0x3b/0x340 fs/open.c:1101 do_open fs/namei.c:4837 [inline] path_openat+0x1443/0x1d60 fs/namei.c:5000 do_file_open+0x23e/0x4a0 fs/namei.c:5029 do_sys_openat2+0x115/0x200 fs/open.c:1417 do_sys_open fs/open.c:1423 [inline] __do_sys_openat fs/open.c:1439 [inline] __se_sys_openat fs/open.c:1434 [inline] __x64_sys_openat+0x138/0x170 fs/open.c:1434 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline] do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fc6e759e159 Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fc6e84ad028 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 00007fc6e7826090 RCX: 00007fc6e759e159 RDX: 0000000000000040 RSI: 000020000000c380 RDI: ffffffffffffff9c RBP: 00007fc6e763506b R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fc6e7826128 R14: 00007fc6e7826090 R15: 00007fc6e794fa48 --- 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