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 F363042050 for ; Tue, 9 Dec 2025 06:43:02 +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=1765262584; cv=none; b=Ef+pN4E8SliEQU68n2b0PncjIELQ6S5wBJcCFPHkCTFsyvD41eH45G1osF2WZw8itEkD273uSF8KRMZ5dM/PVZpX8YkYYv0KQzS6e8MGLjs93BHXsQgNWvIID8FRSVkvegEr+fNOTK5eaoRNpBf+NsAZLhyqdV2osio2jh6dCMk= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1765262584; c=relaxed/simple; bh=YfBPO83OgMZ4JfvXp/HJBzJMLlBnmARObrMPXaYoqLk=; h=MIME-Version:Date:In-Reply-To:Message-ID:Subject:From:To: Content-Type; b=e54XL2kQ+JpmXvPIuzqFyFqpSB7pYaGqw6igvXJhaGEw+Zf5KhaG48/jLFFTJs5lUvv6wtrCDEMlJYdxBfuWTZlaGxu64Rlub81z75j5knK1hzMsOKfQKmrWo933b3Gl3aK9vvRvvtW4GFgyTiCxFRj/jKBtSlbx70VXRk1/P/k= 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 006d021491bc7-6597c6a8be9so5223729eaf.0 for ; Mon, 08 Dec 2025 22:43:02 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1765262582; x=1765867382; 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=kuplvn5PoHVqKRe8OIt9EqJdNEJ3k4RTBVlKiKVGu6I=; b=JB+EbNoB6p8yIWG4fnP0GDsWMqtcFTz1umiiMmEl9NnrjRLfDhBgaW0HF6Y4Vr4v0e eaxRBQk0/ehODXCDOFHAgrtb4l95slQGXwlh+WR9zFwfhFeTho8bLqoZ9VKPkSd57IAT N++plwzRmKGKzk2zJ6vRS7eXqUk2sLo6EeyfellQA/7K5A3IYkcVvuLjnS7l/LkFuhz7 GY6h/48I16K/K1QtZ1LN/md7cQR0bllpPAJuNQ1lCtH3bqBkPNCGJKW+EneyA8lg6yw1 xgVdbJGuzYt4P3bgGU2QaxtaLMicq20jYW/TkUhDrgtjia22tyV7FKo1g+f/ny0MeOwV /QRA== X-Forwarded-Encrypted: i=1; AJvYcCV16NHRBOjfmtAbDbkijspyGd3tr3V83fTclEOhn5HtTTTitxU96VpZiQlOlEYVPt0lZUEAJ3RV7D5GvJ4=@vger.kernel.org X-Gm-Message-State: AOJu0Yximk97sdL58Ta+/qKiwzF7CZbRVFD6l0LrRuisFTKKfFxvgF7/ alZqEObOCk5e3hqNiMiJqVBAc+KgpON37R/Cd9aeKeVFd1J0J4i5HOuqgLTj07M+9xGYJM/GKco Q7ZlyD0d7JxUXvuoXAhbcckYebGstCOXClfi8CM+Z2tWuMQ9CNbJmamRke3E= X-Google-Smtp-Source: AGHT+IHoB+HYo4iU1bVEwJLF7BB1s8CdSETQ84lrJ8gY4wmnCnfncXTG9GZBk0FGb+xI3m+y7+k1Qb1//VOxXIOGMc06kwRYHD0e 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:b449:0:b0:657:44c3:eb66 with SMTP id 006d021491bc7-65b2329b76fmr155498eaf.1.1765262582252; Mon, 08 Dec 2025 22:43:02 -0800 (PST) Date: Mon, 08 Dec 2025 22:43:02 -0800 In-Reply-To: <20251209062801.3246869-1-kartikey406@gmail.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6937c4f6.a70a0220.38f243.00c6.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 WORKINGSET_REFAULT: LRU_GEN enabled, calling lru_gen_refault UNPACK_SHADOW: READING SHADOW shadow=0x2d Unpacked: memcgid=0 nid=11 eviction=0x0 workingset=0 NODE_DATA(11)=0000000000000000 *** BUG: INVALID NODE ID 11! *** WORKINGSET_REFAULT: lru_gen_refault returned BUG: kernel NULL pointer dereference, address: 0000000000000000 #PF: supervisor instruction fetch in kernel mode #PF: error_code(0x0010) - not-present page PGD 243bc067 P4D 243bc067 PUD 0 Oops: Oops: 0010 [#1] SMP KASAN NOPTI CPU: 2 UID: 0 PID: 6459 Comm: syz.0.38 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:ffffc9000326f988 EFLAGS: 00010293 RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff81f7e52e RDX: ffff88802a27a4c0 RSI: ffffea00013ccc40 RDI: ffff8880333a1880 RBP: ffffea00013ccc40 R08: 0000000000000007 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000001 R12: 1ffff9200064df32 R13: ffff8880333a1880 R14: 0000000000000000 R15: dffffc0000000000 FS: 00007fa2d58f86c0(0000) GS:ffff8880d6b07000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffffffffffd6 CR3: 000000002826f000 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: 0033:0x7fa2d498f7c9 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:00007fa2d58f8038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007fa2d4be5fa0 RCX: 00007fa2d498f7c9 RDX: 0000200000000180 RSI: 00000000c0686611 RDI: 0000000000000003 RBP: 00007fa2d4a13f91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fa2d4be6038 R14: 00007fa2d4be5fa0 R15: 00007fffd9de8348 Modules linked in: CR2: 0000000000000000 ---[ end trace 0000000000000000 ]--- RIP: 0010:0x0 Code: Unable to access opcode bytes at 0xffffffffffffffd6. RSP: 0018:ffffc9000326f988 EFLAGS: 00010293 RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff81f7e52e RDX: ffff88802a27a4c0 RSI: ffffea00013ccc40 RDI: ffff8880333a1880 RBP: ffffea00013ccc40 R08: 0000000000000007 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000001 R12: 1ffff9200064df32 R13: ffff8880333a1880 R14: 0000000000000000 R15: dffffc0000000000 FS: 00007fa2d58f86c0(0000) GS:ffff8880d6b07000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffffffffffd6 CR3: 000000002826f000 CR4: 0000000000352ef0 Tested on: commit: cb015814 Merge tag 'f2fs-for-6.19-rc1' of git://git.ke.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=11841eb4580000 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=17105992580000