From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-io1-f70.google.com (mail-io1-f70.google.com [209.85.166.70]) (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 5FC9130E0FA for ; Fri, 21 Nov 2025 12:34:10 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.166.70 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1763728453; cv=none; b=HLrEApDB+LzUIm0FS8ykhMzJLeVygqUg/2vWux4J4J/uqVFlj3NIsCUgRYos/xnazyzmTnt47hSbwk2wHi0itUBi//deG3XIcKlcLHSVuzQtHXuNMPQLN+I4zJUVXQ/9hJhlhR/b/I0W5lMHn4pmn0YxhI9o8tDSTKkKTUoLTZI= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1763728453; c=relaxed/simple; bh=3q0vV4g85M92li/9lywL6WfoHLbuIXL7L0oE5gabPwQ=; h=MIME-Version:Date:In-Reply-To:Message-ID:Subject:From:To: Content-Type; b=RyhwGkpkA7oIFO6bpEdlrd4DazRPcDvKxsPhjZq3HnfM25LOjTIr0sXprpIN+/lnQ2M4QwWwTp/ISL2VAKTwQKtbw/9T1ZlGpFWO05eTq4AB9ZKwCn1xcYIzVGmnmotkB2BsU/jdtcRdVjbdufRN5poFN1ZYl0dadBOjeER3JUw= 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=209.85.166.70 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-f70.google.com with SMTP id ca18e2360f4ac-945c705df24so306988939f.0 for ; Fri, 21 Nov 2025 04:34:09 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1763728448; x=1764333248; h=to:from:subject:message-id:in-reply-to:date:mime-version :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=MkhnTsp5TbW1bQG9/6utO2k62YZwiatQATCOPxik+NQ=; b=h5j+lHZmZst0Nr46BQzrj4hAQtcKlUWiyM3FzDer6/Jby3Qokf74FwBGkiaBGavBAO z7n0IsyB5Z49y8YO/xryF7GpktrrhPB+kutuPmTmt5Fvg0dqpZhGcZiAa8JX4VJ9/BD9 IIRdO98OaGtXTAyJJ483t/RCDNXfzoV+fS38Egqtw0eCHDQYb+nIiRb2yDQ8L70+5wZ2 6gQXlzzjeJEewwpqdNUppPc/DvEcRwk0dwd8CayOsVXTIVKBPWy5Z1wG6UjjYrQBvnvu fXjnpy+ndSmEjW4Bl8FexJEWXSOLIgYSQGgXET2LpSq3GuwLqGxC1riMTvwP/742iKaI 8EQQ== X-Forwarded-Encrypted: i=1; AJvYcCW8w4uZPHxjXbgWYsdq/b7Qv471Te2ojl+Sn5FvWIHgZZR51BcBums9cQ2KdiplONzEOs/iiMl6EEz8ON0=@vger.kernel.org X-Gm-Message-State: AOJu0YxKAdZH9HPZvTwPa5HaslfBMxvbDCF2ncAUgs3dLAhAUoXa4ARx zXbte9+UDmAgej0+w7HjP5/WoAUgkpce3QOHpo/4E8tvGPy0XyhdLhGW7cfrOC3I9Hv0WFYcgI8 Wxt8GcbtL4d/v3OfZrhc5/lGnvmUblNjLd0WC1DANSX7lYsYDw9Gub6Sqi9U= X-Google-Smtp-Source: AGHT+IF7sP8YvFuFFIpZsulYcErDy7ysL7/WosvZqF13WzCTCy1kxK5RD9fsM892fZ7EHgWrOqQesiXJ08Fg2s1nSzLrN6n1slDJ Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a92:c00c:0:b0:434:96ea:ff43 with SMTP id e9e14a558f8ab-435aa8db858mr33054475ab.17.1763728448661; Fri, 21 Nov 2025 04:34:08 -0800 (PST) Date: Fri, 21 Nov 2025 04:34:08 -0800 In-Reply-To: <20251121115221.330869-1-kartikey406@gmail.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <69205c40.a70a0220.2ea503.0050.GAE@google.com> Subject: Re: [syzbot] [ext4?] WARNING in __folio_mark_dirty (3) From: syzbot To: kartikey406@gmail.com, linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot has tested the proposed patch but the reproducer is still triggering an issue: WARNING in __folio_mark_dirty EXT4-fs error (device loop0): ext4_validate_block_bitmap:441: comm syz-executor349: bg 0: block 112: padding at end of block bitmap is not set EXT4-fs error (device loop0): ext4_map_blocks:778: inode #15: block 3: comm syz-executor349: lblock 3 mapped to illegal pblock 3 (length 1) EXT4-fs error (device loop0): ext4_ext_remove_space:2955: inode #15: comm syz-executor349: pblk 0 bad header/extent: invalid extent entries - magic f30a, entries 2, max 4(4), depth 0(0) EXT4_DEBUG: ext4_page_mkwrite called for inode 15, folio index 0, uptodate=0 ------------[ cut here ]------------ WARNING: CPU: 1 PID: 11762 at mm/page-writeback.c:2716 __folio_mark_dirty+0x1fb/0xe20 mm/page-writeback.c:2716 Modules linked in: CPU: 1 UID: 0 PID: 11762 Comm: syz-executor349 Not tainted syzkaller #0 PREEMPT_{RT,(full)} Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 RIP: 0010:__folio_mark_dirty+0x1fb/0xe20 mm/page-writeback.c:2716 Code: 3c 38 00 74 08 48 89 df e8 52 a7 26 00 4c 8b 33 4c 89 f6 48 83 e6 08 31 ff e8 d1 ed c4 ff 49 83 e6 08 75 1c e8 66 e8 c4 ff 90 <0f> 0b 90 eb 16 e8 5b e8 c4 ff e9 7e 07 00 00 e8 51 e8 c4 ff eb 05 RSP: 0000:ffffc9000e9079d0 EFLAGS: 00010293 RAX: ffffffff81f9c4ea RBX: ffffea0002ffa540 RCX: ffff88802e261e00 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000000 R10: dffffc0000000000 R11: fffff940005ff4a9 R12: ffff8880564f0590 R13: ffff8880564f0588 R14: 0000000000000000 R15: dffffc0000000000 FS: 0000555559bd6380(0000) GS:ffff888126ef6000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000200000000440 CR3: 0000000040848000 CR4: 00000000003526f0 Call Trace: block_dirty_folio+0x17a/0x1d0 fs/buffer.c:754 fault_dirty_shared_page+0x103/0x570 mm/memory.c:3519 wp_page_shared mm/memory.c:3906 [inline] do_wp_page+0x263e/0x4930 mm/memory.c:4109 handle_pte_fault mm/memory.c:6211 [inline] __handle_mm_fault mm/memory.c:6336 [inline] handle_mm_fault+0x97c/0x3400 mm/memory.c:6505 do_user_addr_fault+0xa7c/0x1380 arch/x86/mm/fault.c:1336 handle_page_fault arch/x86/mm/fault.c:1476 [inline] exc_page_fault+0x82/0x100 arch/x86/mm/fault.c:1532 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:618 RIP: 0033:0x7f80acffb0c3 Code: 00 00 00 31 c0 e8 ad 43 03 00 bf 02 01 00 00 31 c9 48 ba 40 04 00 00 00 20 00 00 48 b8 2e 2f 66 69 6c 65 30 00 be 9c ff ff ff <48> 89 02 31 c0 e8 83 43 03 00 31 ff e8 1c 76 00 00 66 2e 0f 1f 84 RSP: 002b:00007ffe81efaf50 EFLAGS: 00010246 RAX: 0030656c69662f2e RBX: 0000200000000000 RCX: 0000000000000000 RDX: 0000200000000440 RSI: 00000000ffffff9c RDI: 0000000000000102 RBP: 0000000000000000 R08: 00007ffe81efaf80 R09: 00007ffe81efaf80 R10: 0000000000000e7c R11: 0000000000000246 R12: 00007ffe81efaf6c R13: 00000000000000e5 R14: 431bde82d7b634db R15: 00007ffe81efafa0 Tested on: commit: fd95357f Merge tag 'sched_ext-for-6.18-rc6-fixes-2' of.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=15839742580000 kernel config: https://syzkaller.appspot.com/x/.config?x=38a0c4cddc846161 dashboard link: https://syzkaller.appspot.com/bug?extid=b0a0670332b6b3230a0a compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 patch: https://syzkaller.appspot.com/x/patch.diff?x=12647e0a580000