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 E4674280A3B for ; Sun, 7 Dec 2025 16:23:04 +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=1765124586; cv=none; b=GeQGNEYnavMat+YxCBasuCS8CitDDUwNo4c+aWjYTgF+Bq/JwYat/FmYnieh2WSZn6H7gVdV4NsA0CY4qcLSa3WBMHHLc4YHy04jRgnfR/asZBTLo+SSTwWDV6Fv+nP997+TQS/aYQ2n6mmiEBcAdyMLpyBMTQoYwi+JwYIwLO8= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1765124586; c=relaxed/simple; bh=FJSS2vAvaR1q2TFfNKw5FHrlR3doWYFVQup3kiOcNW8=; h=MIME-Version:Date:In-Reply-To:Message-ID:Subject:From:To: Content-Type; b=ZuhBNj2gC3uRf+EOBXZDt+4dTmUNmykEY9MBn+acZOz74NUz68lYgaRbE3S2X1bEbt1s7qtPh91DoCeDiFX5RFVksxL79f5qIbEOFB24BB6ZyBlEonxQUpyi7DLfskc0P8FC1n+tgk2Jf1kQa/jB/DQ3vpiviXBzdqLeX5goAv8= 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 006d021491bc7-6576fd62dffso4547155eaf.2 for ; Sun, 07 Dec 2025 08:23:04 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1765124583; x=1765729383; 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=eLu4shIr7+is1xb0z5WnVvhGddnuWfMpq4HR7J0AIY4=; b=jrY5no8OAXO/j6/IxK8jM59UvuYgfoDyyjdzGqS57vb7X3kftaRgQKqSwk4dK+R1di zLzM+e+/crS82WlORqlAyyyTkEYn80eeo/C9S2ZM7xolvu+GrxySyGL+Y11gSKxIyo2c UPevj/WEXKg4FnHu0LSEHrpcO1rDozCIrKDrBSxDiIdG7Gzm+B3SBeL/U2gf4HoViJ0d e5veguDzC9iB4Ver5MJryg61T2HQ4OUiLYFdIlIbIQES5gYdX/GgTPFSEIc5ojc471ea BhpUxLhGBX4zIpT7pML8ru2ovb30ltsPKcBqnAtKh3DGQg8UARJJ9flFszOOZxhlCA4s 2IFA== X-Forwarded-Encrypted: i=1; AJvYcCVrWik8F4itoXqwAYZylTJ3/JJMSNyTT0TXiosDE1PgcOST9/t5qftUt+6vmDZEJ9LXI0xiwlwFPAr0hS4=@vger.kernel.org X-Gm-Message-State: AOJu0YyfV8/4C/a04zTXn2wwBf7x3OFgcwLBsEuSt+SuZdXtTUMMe5pE IFc4aZexpZYH1xqMg0FX8Wi6+asMljWfsKf4x9dBJCLDLlpu5PHcaOHTxuPUrG7ukaJdEz9wiDi oyLM8t0DzbDxfwBw3qC0qkMgzcPlktNw3Dj62xaAmWHwCmmY8yRE/Vzzd7Zo= X-Google-Smtp-Source: AGHT+IEgPpN6P7ah1qUQGwg1kaYnaph1LpOcJ9RoQdlrwn5b9YwcClhVQdbHJxBYF0lemjwF3XnkIlkHY8LOoTPeMYlBpSC4Uu6V Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6820:818e:b0:659:9a49:8f50 with SMTP id 006d021491bc7-6599a90200cmr2488390eaf.21.1765124583440; Sun, 07 Dec 2025 08:23:03 -0800 (PST) Date: Sun, 07 Dec 2025 08:23:03 -0800 In-Reply-To: <20251207160752.2863580-1-kartikey406@gmail.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6935a9e7.a70a0220.38f243.0065.GAE@google.com> Subject: Re: [syzbot] [mm?] general protection fault in lru_gen_test_recent (2) 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: BUG: unable to handle kernel NULL pointer dereference in filemap_read_folio DEBUG: memcg is NULL (memcg_id=0), pgdat=0000000000000000, returning false DEBUG: shadow=0000000000000013 token=0 workingset=1 BUG: kernel NULL pointer dereference, address: 0000000000000000 #PF: supervisor instruction fetch in kernel mode #PF: error_code(0x0010) - not-present page PGD 36e08067 P4D 36e08067 PUD 0 Oops: Oops: 0010 [#1] SMP KASAN NOPTI CPU: 2 UID: 0 PID: 6417 Comm: syz.0.25 Not tainted syzkaller #0 PREEMPT(full) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 RIP: 0010:0x0 Code: Unable to access opcode bytes at 0xffffffffffffffd6. RSP: 0018:ffffc9000444f988 EFLAGS: 00010293 RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff81f7e52e RDX: ffff888036dfc980 RSI: ffffea00011b2b00 RDI: ffff8880329bbdc0 RBP: ffffea00011b2b00 R08: 0000000000000007 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000001 R12: 1ffff92000889f32 R13: ffff8880329bbdc0 R14: 0000000000000000 R15: dffffc0000000000 FS: 00007f75eb5a26c0(0000) GS:ffff8880d6b09000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffffffffffd6 CR3: 000000005576a000 CR4: 0000000000352ef0 Call Trace: filemap_read_folio+0xc8/0x2a0 mm/filemap.c:2496 do_read_cache_folio+0x266/0x5c0 mm/filemap.c:4096 freader_get_folio+0x33a/0x930 lib/buildid.c:58 freader_fetch+0xbd/0x740 lib/buildid.c:101 __build_id_parse.isra.0+0xdd/0x6c0 lib/buildid.c:289 do_procmap_query+0xb0e/0x1080 fs/proc/task_mmu.c:733 procfs_procmap_ioctl+0x9d/0xe0 fs/proc/task_mmu.c:813 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:597 [inline] __se_sys_ioctl fs/ioctl.c:583 [inline] __x64_sys_ioctl+0x18e/0x210 fs/ioctl.c:583 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xcd/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f75ea78f7c9 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f75eb5a2038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f75ea9e5fa0 RCX: 00007f75ea78f7c9 RDX: 0000200000000180 RSI: 00000000c0686611 RDI: 0000000000000003 RBP: 00007f75ea813f91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f75ea9e6038 R14: 00007f75ea9e5fa0 R15: 00007fff20402df8 Modules linked in: CR2: 0000000000000000 ---[ end trace 0000000000000000 ]--- RIP: 0010:0x0 Code: Unable to access opcode bytes at 0xffffffffffffffd6. RSP: 0018:ffffc9000444f988 EFLAGS: 00010293 RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff81f7e52e RDX: ffff888036dfc980 RSI: ffffea00011b2b00 RDI: ffff8880329bbdc0 RBP: ffffea00011b2b00 R08: 0000000000000007 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000001 R12: 1ffff92000889f32 R13: ffff8880329bbdc0 R14: 0000000000000000 R15: dffffc0000000000 FS: 00007f75eb5a26c0(0000) GS:ffff8880d6b09000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffffffffffd6 CR3: 000000005576a000 CR4: 0000000000352ef0 Tested on: commit: 9e906a9d Merge tag 'perf-tools-for-v6.19-2025-12-06' o.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=162e66c2580000 kernel config: https://syzkaller.appspot.com/x/.config?x=dbcb767d1e1208ac dashboard link: https://syzkaller.appspot.com/bug?extid=e008db2ac01e282550ee compiler: gcc (Debian 12.2.0-14+deb12u1) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 patch: https://syzkaller.appspot.com/x/patch.diff?x=14b1521a580000