From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-oo1-f72.google.com (mail-oo1-f72.google.com [209.85.161.72]) (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 531A33093C6 for ; Tue, 24 Mar 2026 20:07:03 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.161.72 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1774382824; cv=none; b=G/8HJyjzLckwYivsjxytg5UdLQil4YKm3WZPE4f+F3Xzr33EwNvWAN9tlr2DMIxwvnn9tUBO6Gjj4WVJ3jyt3riEfNM4RfCiE6b/7xH2OYIk6qZGvZEaF/ZqPF0qtkfqB2Vy6S9kyH98G+bilBwUvVMk1WBMxTWyIuzhtE+pDPc= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1774382824; c=relaxed/simple; bh=/WfW/K9IuXlKDvzUoTqXph27ozWc+8fnXlHU/F+yrMA=; h=MIME-Version:Date:In-Reply-To:Message-ID:Subject:From:To: Content-Type; b=TWdlcSbtdiuyKOb0WlFgchlPMEmKMMECVpQk2ppsNJqDBUQVpnEmchd5CFqwo8NCf0NlsrQeAygglQFo4fmITB/UzP5DCXdIQ0/Q37VULBHdpFlMgR2rmwnnfTtw9ZM+MipH1V4hmpqjqQJl8BwcOw8sRVoHqxTduhfQENxgYiA= 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=209.85.161.72 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-oo1-f72.google.com with SMTP id 006d021491bc7-67dec1314b5so17181863eaf.2 for ; Tue, 24 Mar 2026 13:07:03 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1774382822; x=1774987622; 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=+QvG/ms/DfUwbpPSY9PUURdxCuKfc0Easb7opQ0TpTk=; b=k3VH3yLUWMZJjhOgzGTBx/3T69bj4RkmCtJy3+uo+NjfiU6+gmVo6Gw1TLoMoI+klF 89JqwA/YupL1ddjTV8xl5Xkjk14hAuF2x6V5hcGlj1F2Xt5aagxv6+plveOTg+Ze0ZkV 17p47XLy/083yXmV5CASVRJXsYadaYXoDMZuDiejvLRXxR0Ak33mf5qwZRYJKfe4RKMu nhQeSaCGLqExb/hW0gkWWn64X5dp8HY54ItWIflHD9zYiruYMuVQJNXscEJPsXD+U1bc FmE3TC7OhXpt8K0dy1h90W8hWF2itrniKfXgx8OeZ2l2MKLv+YFHN+r1HyQSfCKKLOSi N34A== X-Forwarded-Encrypted: i=1; AJvYcCWAnIVqg4Gq0bRuAgJmuP15xIHIMtajsVp5VGEd8ZWp4DcxcTwnHei6DvlYPtF8/jZUKg2eHVYO66mfzBs=@vger.kernel.org X-Gm-Message-State: AOJu0YxaDbRR/OpV4cA/fCbUW+zv4EOx+qlQLMbqjSrrp3YPMEJ2/7Y2 cqh2vLrg3y2soMF0dvDt20ofUKJsrBKLnqMZstFq1Su5kE5Z1dzaAknWY/uaJpatDqIgr+4ZixL GeRzDpzbmzUsuqiQQ8AmIlX/dN8eQIqyOIpTuC4H4WV/aoDh8QEFkL8WktIM= Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6820:1626:b0:67c:2d5e:e9db with SMTP id 006d021491bc7-67dff531c8bmr638954eaf.42.1774382822306; Tue, 24 Mar 2026 13:07:02 -0700 (PDT) Date: Tue, 24 Mar 2026 13:07:02 -0700 In-Reply-To: X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <69c2eee6.050a0220.abc16.0002.GAE@google.com> Subject: Re: [syzbot] [fs?] [mm?] kernel BUG in __filemap_add_folio From: syzbot To: hellouser819@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: kernel BUG in __filemap_add_folio sock_alloc_send_pskb+0x801/0x980 net/core/sock.c:2995 unix_dgram_sendmsg+0x3c7/0x1820 net/unix/af_unix.c:2127 sock_sendmsg_nosec net/socket.c:727 [inline] __sock_sendmsg net/socket.c:742 [inline] __sys_sendto+0x468/0x4b0 net/socket.c:2206 __do_sys_sendto net/socket.c:2213 [inline] __se_sys_sendto net/socket.c:2209 [inline] __x64_sys_sendto+0xe0/0x1c0 net/socket.c:2209 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x106/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f ------------[ cut here ]------------ kernel BUG at mm/filemap.c:858! Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI CPU: 1 UID: 0 PID: 6671 Comm: syz.1.18 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026 RIP: 0010:__filemap_add_folio+0xfcf/0x1280 mm/filemap.c:858 Code: 33 c5 ff 48 c7 c6 e0 16 ba 8b 4c 89 ef e8 e9 3f 12 00 90 0f 0b e8 e1 33 c5 ff 48 c7 c6 40 17 ba 8b 4c 89 ef e8 d2 3f 12 00 90 <0f> 0b e8 ca 33 c5 ff 90 0f 0b 90 e9 4b fe ff ff e8 bc 33 c5 ff 90 RSP: 0018:ffffc900037c7428 EFLAGS: 00010293 RAX: 0000000000000000 RBX: 0000000000112cc0 RCX: 0000000000000000 RDX: ffff888031ce24c0 RSI: ffffffff82558dc8 RDI: ffff888031ce2984 RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000002 R13: ffffea000142ef40 R14: 0000000000000000 R15: 1ffff920006f8eaf FS: 00007efde0ba96c0(0000) GS:ffff888124728000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f155571a286 CR3: 000000006b1d7000 CR4: 00000000003526f0 Call Trace: filemap_add_folio+0x1d8/0x690 mm/filemap.c:966 ra_alloc_folio mm/readahead.c:456 [inline] page_cache_ra_order+0x614/0xf30 mm/readahead.c:515 do_sync_mmap_readahead mm/filemap.c:3405 [inline] filemap_fault+0x191a/0x2eb0 mm/filemap.c:3554 __do_fault+0x10d/0x550 mm/memory.c:5364 do_shared_fault mm/memory.c:5863 [inline] do_fault+0x2db/0x1990 mm/memory.c:5937 do_pte_missing mm/memory.c:4477 [inline] handle_pte_fault mm/memory.c:6317 [inline] __handle_mm_fault+0x180f/0x2b60 mm/memory.c:6455 handle_mm_fault+0x36d/0xa20 mm/memory.c:6624 faultin_page mm/gup.c:1126 [inline] __get_user_pages+0xf9c/0x34d0 mm/gup.c:1428 __get_user_pages_locked mm/gup.c:1692 [inline] faultin_page_range+0x1f1/0x9e0 mm/gup.c:1912 madvise_populate mm/madvise.c:974 [inline] madvise_do_behavior+0x354/0x510 mm/madvise.c:1933 do_madvise+0x195/0x240 mm/madvise.c:2028 __do_sys_madvise mm/madvise.c:2037 [inline] __se_sys_madvise mm/madvise.c:2035 [inline] __x64_sys_madvise+0xa9/0x110 mm/madvise.c:2035 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x106/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7efddfd9aef9 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:00007efde0ba9028 EFLAGS: 00000246 ORIG_RAX: 000000000000001c RAX: ffffffffffffffda RBX: 00007efde0005fa0 RCX: 00007efddfd9aef9 RDX: 0000000000000017 RSI: 0000000000c00000 RDI: 0000200000000000 RBP: 00007efddfe2fee0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007efde0006038 R14: 00007efde0005fa0 R15: 00007ffccbb43488 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:__filemap_add_folio+0xfcf/0x1280 mm/filemap.c:858 Code: 33 c5 ff 48 c7 c6 e0 16 ba 8b 4c 89 ef e8 e9 3f 12 00 90 0f 0b e8 e1 33 c5 ff 48 c7 c6 40 17 ba 8b 4c 89 ef e8 d2 3f 12 00 90 <0f> 0b e8 ca 33 c5 ff 90 0f 0b 90 e9 4b fe ff ff e8 bc 33 c5 ff 90 RSP: 0018:ffffc900037c7428 EFLAGS: 00010293 RAX: 0000000000000000 RBX: 0000000000112cc0 RCX: 0000000000000000 RDX: ffff888031ce24c0 RSI: ffffffff82558dc8 RDI: ffff888031ce2984 RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000002 R13: ffffea000142ef40 R14: 0000000000000000 R15: 1ffff920006f8eaf FS: 00007efde0ba96c0(0000) GS:ffff888124628000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f577493d9e8 CR3: 000000006b1d7000 CR4: 00000000003526f0 Tested on: commit: e3c33bc7 Merge tag 'mm-hotfixes-stable-2026-03-23-17-5.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=13e4d6da580000 kernel config: https://syzkaller.appspot.com/x/.config?x=75b16ce1bc745e05 dashboard link: https://syzkaller.appspot.com/bug?extid=4d3cc33ef7a77041efa6 compiler: gcc (Debian 14.2.0-19) 14.2.0, GNU ld (GNU Binutils for Debian) 2.44 Note: no patches were applied.