From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-oo1-f71.google.com (mail-oo1-f71.google.com [209.85.161.71]) (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 3D4151F5EA for ; Mon, 8 Dec 2025 05:07:03 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.161.71 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1765170425; cv=none; b=RkQqDT9rbd7aIhUG2g68++wEZwNyDFMADGvbnON68IREtz3AXpG1IY2Z1ZwBK4zrWkoCXTJ5PtIk0VJ5XpY2Jc1byceOGYyyxddPIigzkWScoMa0nXKo+lP04kY0uSzxc9dX8yNCg52HqXexjB3pVF29FtA6a2yWBOVbp04I6Gg= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1765170425; c=relaxed/simple; bh=Qc+ckuAfxyg176+E63bN8vCnvuOUabZyznCWcDh+f6w=; h=MIME-Version:Date:In-Reply-To:Message-ID:Subject:From:To: Content-Type; b=gl+jd+XxjJPg7WGk597zezWELn1d104aiyvm8QTZ39l+ZeX8RJ1x7kXcOfgLKi6grYvJUvVr0MOpPGZX53AlDRPNC3Dy//Kw34R4EK4cleOoqZeHehVu4BDc2Ny5S/Kd2/n2Ua8dbY43No4exN0e42+LB9wCqk4e88OKMREPeCU= 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=209.85.161.71 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-f71.google.com with SMTP id 006d021491bc7-656ed76017aso6443516eaf.1 for ; Sun, 07 Dec 2025 21:07:03 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1765170422; x=1765775222; 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=ayhgedh9hGLTuW85L/T/CWD1rEmrX83tCIGkGb0IwBE=; b=mXAB4/iYQu7sjVLenAGQpL6w0ykL9BWJSl/KoeXKOk76wgF++LbxNj7uR29Yr00cYa oaomGIHmY7L2p6PhQ+Sd+AMWcqmdyipy+BTU1aChES1U4g3Q6OS0l3ooL5sqHHAegHT/ xAlm6F9288ZXvgN9Ff1EFHHFccE6N0KhWD7ejZQqFPKGk3xiyaelf0ERIem2N2PW1n5N iGQpBTL6QAKkwOfwzLweywApRNmXBTYM0RSKcmbHE2BhSgdwNIkJW7S00kVE3PYU15Um jj3cPBjJ4O1y5uDi4BvGur2f1BUm6zpRqZ24Pf6y/psokbZjdFgy7BsiEOxJREZBnFWX kuMA== X-Forwarded-Encrypted: i=1; AJvYcCWLHkC/NzXV5edAVeID8+bNfc+bKhBZZEJOik/vzwufw4fEKYzRnD46yy+C/v6s+kZEC0ZExrQYgGbXjuE=@vger.kernel.org X-Gm-Message-State: AOJu0YxkxXzdls84p04zcfouKSIKOJo2g7bvXu1RrvuwYXnuH8e2KD71 VCPczv/JqPOuuj0HCJcU8lwX46sAKQYPGs98gY4lL4EXmhCj6wGNLfzwNY+LaHMODy+ScU7xdbc 5fN8OjmW6CZQRW+Q2ysB+HC/oyd1VSfUVAyZ2PuuYOKX7FyGV+IhcmlKsm+g= X-Google-Smtp-Source: AGHT+IEHImknXq1S3LNB//M6LEGUYvi4I8hR5KmJxbkgJY+rl/QFotioUaNfkHrICZ5M97HaK715G/O1WiLuO7ZkIB1QFZ5xMpCK Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a4a:da45:0:b0:659:9a49:8e15 with SMTP id 006d021491bc7-6599a49c2bdmr2886390eaf.7.1765170422452; Sun, 07 Dec 2025 21:07:02 -0800 (PST) Date: Sun, 07 Dec 2025 21:07:02 -0800 In-Reply-To: <20251208044921.2928668-1-kartikey406@gmail.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <69365cf6.a70a0220.38f243.0084.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, syzbot@syzkaller.appspot.com, 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 BUG: kernel NULL pointer dereference, address: 0000000000000000 #PF: supervisor instruction fetch in kernel mode #PF: error_code(0x0010) - not-present page PGD 33c06067 P4D 33c06067 PUD 0 Oops: Oops: 0010 [#1] SMP KASAN NOPTI CPU: 1 UID: 0 PID: 6494 Comm: syz.0.46 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:ffffc9000355f988 EFLAGS: 00010293 RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff81f7e52e RDX: ffff888025660000 RSI: ffffea00013c7300 RDI: ffff88802b34c380 RBP: ffffea00013c7300 R08: 0000000000000007 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000001 R12: 1ffff920006abf32 R13: ffff88802b34c380 R14: 0000000000000000 R15: dffffc0000000000 FS: 00007f612a2386c0(0000) GS:ffff8880d6a09000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffffffffffd6 CR3: 000000005475f000 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: 0033:0x7f612938f7c9 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:00007f612a238038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f61295e5fa0 RCX: 00007f612938f7c9 RDX: 0000200000000180 RSI: 00000000c0686611 RDI: 0000000000000003 RBP: 00007f6129413f91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f61295e6038 R14: 00007f61295e5fa0 R15: 00007ffc87556108 Modules linked in: CR2: 0000000000000000 ---[ end trace 0000000000000000 ]--- RIP: 0010:0x0 Code: Unable to access opcode bytes at 0xffffffffffffffd6. RSP: 0018:ffffc9000355f988 EFLAGS: 00010293 RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff81f7e52e RDX: ffff888025660000 RSI: ffffea00013c7300 RDI: ffff88802b34c380 RBP: ffffea00013c7300 R08: 0000000000000007 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000001 R12: 1ffff920006abf32 R13: ffff88802b34c380 R14: 0000000000000000 R15: dffffc0000000000 FS: 00007f612a2386c0(0000) GS:ffff8880d6a09000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffffffffffd6 CR3: 000000005475f000 CR4: 0000000000352ef0 Tested on: commit: c2f2b01b Merge tag 'i3c/for-6.19' of git://git.kernel... git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=169ce992580000 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=14b58ec2580000