From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-oo1-f69.google.com (mail-oo1-f69.google.com [209.85.161.69]) (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 C2CA92FB99E for ; Mon, 8 Dec 2025 04:14:03 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.161.69 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1765167245; cv=none; b=ZcXAoqaQoeLRioPiG8IcFV3zzAFgMSI4KeCeGCcZ6Fq2DLWYTocNrOlDgSuDJfZNQuA3t0bSXjDqQ1dD7+PBSxSDLg3/oX6FVz2eSU2cOjzpIjxZxeHkzpKOKNf4tMicVm8Fn1WupgenAeoa9OK7YfaARJoUzocDpUEbDMliS0c= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1765167245; c=relaxed/simple; bh=1nb+KSt2pnycVVFLKg9rjhVI8QnfVS9Qfa5YliWKKxU=; h=MIME-Version:Date:In-Reply-To:Message-ID:Subject:From:To: Content-Type; b=iIBtNk8+6J2ya/0+ZGlL6dMqPF3c0NDWpPKA3qJ4KMkAhqs+/iP93Bis6PokbpbtHOg0kIpH74B+KNbiVNmQi2H4WnjFLqk1YTShjWIp/LoL6lf6mr8FyMt3zXS6n+QkMK97e5CPHRIvK44NVn4BR3bx9N2WAyRXO7QNehHInpg= 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=209.85.161.69 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-f69.google.com with SMTP id 006d021491bc7-6574d3d44f9so5708507eaf.3 for ; Sun, 07 Dec 2025 20:14:03 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1765167243; x=1765772043; 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=XD8gFllTkbgMOQH53Cvi82nUI6u6s7D7xStfuifloA0=; b=tOTIl6muomv40R4F07mMCednN27xgr/XgGwtmo7yRzKM7mWD9aDkDwbmmRdIeROqjr ud4pGS+U4RpDNLhY32VDkD4gKh4lf2QlLfyPH2Tj/X84wUm/lNtsNgCZRkB7Y0/hcA/4 FzCuUWh65bDrmXGo4a+q/q+Npmy4lFnuq0MZzp+fks4MFhMjYSXVkh6MjHiMuJjk/L6d uc4DbVeUkjLJwRvMyTJrsY4IV8N3MEaIRLL2+3IIVCZYkbZV9DKikP4T7QHVOAbM1fN6 dSszhsV0CuDrrMkWxAorpzcBZVwsl+04c4N4iqIP96gLmUxYox4PL++x4J7aSQDpf5TZ dxpw== X-Forwarded-Encrypted: i=1; AJvYcCXzyj3Mi3grSWwAfjh9vdykHfVOw9VnFtoTB91M9XmLP4AlTUcTDm/xPz6q1dPkKuijSdlGgY+dBi/XClM=@vger.kernel.org X-Gm-Message-State: AOJu0Yx/cKGN8hE5+hGsXxprDm4lwreozGoONHyy+pRQ3QbJl7bbdcQI EetD8h2I47rGxU8iQTLEtHN3GNhL21vOp14pRuH2+/K0kzbVmkew33oVbVMi7YRUfkkNs3G50fR ofsnX115+iDpaUt1NEYlhEEVX17U8jXVbjw9IusdPIAv69lXV7EU3S2Yaxp4= X-Google-Smtp-Source: AGHT+IHUsdwGiONRNhqerj5WqLXc5SsEO4DHn9WHOEVeN8KNwDfnyCvFw6Nf66rBa7DRhlX3d2EEQaNAADvwLMKIT6mVk7L8SMEF Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6820:178a:b0:659:9a49:9017 with SMTP id 006d021491bc7-6599a986298mr3045280eaf.68.1765167243002; Sun, 07 Dec 2025 20:14:03 -0800 (PST) Date: Sun, 07 Dec 2025 20:14:02 -0800 In-Reply-To: <20251208035638.2927077-1-kartikey406@gmail.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6936508a.a70a0220.38f243.0080.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 RBP: 00007fb7c7c13f91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fb7c7de6038 R14: 00007fb7c7de5fa0 R15: 00007ffd557726f8 BUG: kernel NULL pointer dereference, address: 0000000000000000 #PF: supervisor instruction fetch in kernel mode #PF: error_code(0x0010) - not-present page PGD 4f090067 P4D 4f090067 PUD 0 Oops: Oops: 0010 [#1] SMP KASAN NOPTI CPU: 3 UID: 0 PID: 6482 Comm: syz.0.48 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:ffffc90003d47988 EFLAGS: 00010293 RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff81f7e52e RDX: ffff88802283a4c0 RSI: ffffea00010cb180 RDI: ffff888031ad5500 RBP: ffffea00010cb180 R08: 0000000000000007 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000001 R12: 1ffff920007a8f32 R13: ffff888031ad5500 R14: 0000000000000000 R15: dffffc0000000000 FS: 00007fb7c8ab16c0(0000) GS:ffff8880d6c09000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffffffffffd6 CR3: 000000004ec6a000 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: 0033:0x7fb7c7b8f7c9 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:00007fb7c8ab1038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007fb7c7de5fa0 RCX: 00007fb7c7b8f7c9 RDX: 0000200000000180 RSI: 00000000c0686611 RDI: 0000000000000003 RBP: 00007fb7c7c13f91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fb7c7de6038 R14: 00007fb7c7de5fa0 R15: 00007ffd557726f8 Modules linked in: CR2: 0000000000000000 ---[ end trace 0000000000000000 ]--- RIP: 0010:0x0 Code: Unable to access opcode bytes at 0xffffffffffffffd6. RSP: 0018:ffffc90003d47988 EFLAGS: 00010293 RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff81f7e52e RDX: ffff88802283a4c0 RSI: ffffea00010cb180 RDI: ffff888031ad5500 RBP: ffffea00010cb180 R08: 0000000000000007 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000001 R12: 1ffff920007a8f32 R13: ffff888031ad5500 R14: 0000000000000000 R15: dffffc0000000000 FS: 00007fb7c8ab16c0(0000) GS:ffff8880d6c09000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffffffffffd6 CR3: 000000004ec6a000 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=16598ec2580000 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=15098ec2580000