From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-oa1-f70.google.com (mail-oa1-f70.google.com [209.85.160.70]) (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 071EA27467E for ; Tue, 9 Dec 2025 05:59:02 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.160.70 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1765259946; cv=none; b=EN7vejznwBrBbXLvDvY8o6y2EjJCFARV5ueWI9zPnYfpzPgMkAoIkNF5k1V54tNpqa2E30IHUMFnrpLEqX7eZ0nNyqI8Y4VyEccVdpVJUJ2MgTg/bGf3et+9oHWrjE7oQ91TjNf4BtRtehbvj3YylwuMUaOMt6BY1CUzfD+ysGA= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1765259946; c=relaxed/simple; bh=+POcXS30iYCK7Nm6kpm3JEOuwt4l2ZUUr/Spxg2aVY0=; h=MIME-Version:Date:In-Reply-To:Message-ID:Subject:From:To: Content-Type; b=l61kAbkgL7dop78LuBqHCdlZ/x4dxkNp2q1G/41+44SbyRo3jQgbPoZ/fQmgyPBbl2Xg5bYDmRyvSK0dVIaAnzu2+0gJ5JVxtTU6LhFKs7b+lTs3LUSOLZd3ypnCXu/X+mgcJu6RPFXxTL1nNmYnZttg9cRldBb4AZrRn7/NcKQ= 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=209.85.160.70 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-oa1-f70.google.com with SMTP id 586e51a60fabf-3e88192e178so3488003fac.1 for ; Mon, 08 Dec 2025 21:59:02 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1765259942; x=1765864742; 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=ijTREpGfAoZJMIbR+7SijQiBsMDZqCC4M294jMncBKY=; b=j9DasHwWWNE45AUcRaQY8xdplN24M+55M8dlhvfr5NqLJAQ1p7R7oYysrfLwXwNDqk Z++D6QcQRWhq/m9Cqao3j81yXoOb656BcJBCTe1cZdz8RgCvVeYsj8rTPP1lazS6zK+v 6qJ07Sn3EG/0TWHDiXgpfdE5IQI+vFDqEVvsbettIjatuVkXRyCJDWwKqC6zVuh5ogGj 9p+yqjG5OCnbXITiuyZhWXoBrGjiZ4ND2J/HrD7fMXJlst3smjptZpxMDhPdSmlzyxag oY5uHPo711M/igDJTbUF+0tvk66dJZTgV504lFwXS9IOE4Lbbb+aQ6XIXjNtQTwzdPY8 ijOw== X-Forwarded-Encrypted: i=1; AJvYcCU9egh/MFDVpAPqVOzxcrlp943jaKweuNggVNmorvUAjJ4PXrKn6ZVUmbnzx+DopEgkgfUpJRQBhqarBUQ=@vger.kernel.org X-Gm-Message-State: AOJu0YzAGevxdjbiOprZJNcxwDOydnzYxJOO6G15hwiEBdRuunBHfLDC nnecm7vn1wQVdBw/DnXPhNhLeGBhN89XNBfZxCGf5KCM2TOBFcwyk6nP0iRAwZN5dzSr0wzPw3V f/iIKSwiWaJZRTihISx/I4f1js2H26k3fT0j/SLYoyV3nfVtBM2oi6m2a7gA= X-Google-Smtp-Source: AGHT+IGx12JKt4p6c/NdTAqdWDNAJHROTWce9MDivncs5oCyQgdt5q3DLsDs2gYdM6m50H3kGLUvJgPa/5W93RAraeb18wSKtOn8 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6820:810b:b0:659:9a49:90cd with SMTP id 006d021491bc7-6599a9869f4mr3871754eaf.76.1765259942101; Mon, 08 Dec 2025 21:59:02 -0800 (PST) Date: Mon, 08 Dec 2025 21:59:02 -0800 In-Reply-To: <20251209054447.3244819-1-kartikey406@gmail.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6937baa6.a70a0220.38f243.00c4.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 shadow=0x11 Unpacked: memcgid=0 nid=4 eviction=0x0 workingset=0 NODE_DATA(4)=0000000000000000 *** BUG: INVALID NODE ID 4! *** CPU: 1 UID: 0 PID: 6408 Comm: syz.0.24 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 Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x16c/0x1f0 lib/dump_stack.c:120 unpack_shadow+0x1f3/0x270 mm/workingset.c:243 lru_gen_test_recent+0x9a/0x350 mm/workingset.c:299 lru_gen_refault mm/workingset.c:329 [inline] workingset_refault+0x290/0xd50 mm/workingset.c:585 filemap_add_folio+0x23d/0x610 mm/filemap.c:981 do_read_cache_folio+0x23c/0x5c0 mm/filemap.c:4063 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: 0033:0x7fcba4f8f7c9 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:00007fcba5ee8038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007fcba51e5fa0 RCX: 00007fcba4f8f7c9 RDX: 0000200000000180 RSI: 00000000c0686611 RDI: 0000000000000003 RBP: 00007fcba5013f91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fcba51e6038 R14: 00007fcba51e5fa0 R15: 00007ffc01f89a28 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 32990067 P4D 32990067 PUD 0 Oops: Oops: 0010 [#1] SMP KASAN NOPTI CPU: 0 UID: 0 PID: 6408 Comm: syz.0.24 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:ffffc90003d1f988 EFLAGS: 00010293 RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff81f7e52e RDX: ffff88802e4e4980 RSI: ffffea000167d2c0 RDI: ffff888039482000 RBP: ffffea000167d2c0 R08: 0000000000000007 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000001 R12: 1ffff920007a3f32 R13: ffff888039482000 R14: 0000000000000000 R15: dffffc0000000000 FS: 00007fcba5ee86c0(0000) GS:ffff8880d6907000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffffffffffd6 CR3: 000000002bb78000 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: 0033:0x7fcba4f8f7c9 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:00007fcba5ee8038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007fcba51e5fa0 RCX: 00007fcba4f8f7c9 RDX: 0000200000000180 RSI: 00000000c0686611 RDI: 0000000000000003 RBP: 00007fcba5013f91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fcba51e6038 R14: 00007fcba51e5fa0 R15: 00007ffc01f89a28 Modules linked in: CR2: 0000000000000000 ---[ end trace 0000000000000000 ]--- RIP: 0010:0x0 Code: Unable to access opcode bytes at 0xffffffffffffffd6. RSP: 0018:ffffc90003d1f988 EFLAGS: 00010293 RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff81f7e52e RDX: ffff88802e4e4980 RSI: ffffea000167d2c0 RDI: ffff888039482000 RBP: ffffea000167d2c0 R08: 0000000000000007 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000001 R12: 1ffff920007a3f32 R13: ffff888039482000 R14: 0000000000000000 R15: dffffc0000000000 FS: 00007fcba5ee86c0(0000) GS:ffff8880d6907000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffffffffffd6 CR3: 000000002bb78000 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=17d01eb4580000 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=112dca1a580000