From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-il1-f205.google.com (mail-il1-f205.google.com [209.85.166.205]) (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 275C6264638 for ; Thu, 13 Nov 2025 16:44:33 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.166.205 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1763052275; cv=none; b=EmvHSP7BhVcUDM/5csnYUylWxLE1YaZvafGBtXrJHL7PD7LNpYl6k/U5vriILOs2oavh6S6BihKT8x31v8IKf9lZTctdzVh2ZjhWDSD3I1PNAqCTpyKoBDK/GPd+ViR8cmcuhsU0l9+Phrhb38krzjQnRM0f16AEJ2u49aZTspM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1763052275; c=relaxed/simple; bh=Rb/r9qORZ0p4+buSqlPGhVhIHiba8wIgHkZ/KFORVos=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=AmfwcSqpFU+Hkm4mErlVEGxYrDzP37uoI4fHyw8H0amy0SblA2bAkQFH4iR1RgkJnaGHaVldHxBV2TVb5/LNqBWa7itW83Cng4lqVAU6x5ByFc7BAB6CsxqSxMAJ3RpXLwJbCXRuLWrVnZFuUylttFP+sDMMntrFjADuRgVELbs= 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=209.85.166.205 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-il1-f205.google.com with SMTP id e9e14a558f8ab-43373024b5eso12600535ab.1 for ; Thu, 13 Nov 2025 08:44:33 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1763052273; x=1763657073; h=to:from:subject:message-id:date:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=4hWwj6fy0/rB4RTGq3xc0Fnf3TBZ5FQ1+cI6MAHTftw=; b=UFDS9oGpvGjKYOM3DDaWYZ7E1gM7as012pZJBH4b7mBG5+dtfIdvicXiLB5IISN098 ++ptZxZFd4aUZZ5u6stGeGtYsIs63dgnl+CH8ahqLCQ8CdybLPmNIr00kuNCQ+FBThOQ oxubNs2MtN1iKDgp7rDIltFVhmNmjh6rj0tAO0FLSeRM/ZZrBRZYncbKOIQfzyAdwzMy aF29oeVglC1bI5RHWOpXhV4K+1xY7MOu2oqsNF22EpYjW+tjnb5X05W9arorsUFHB9Fw EOuO/AjhLdjcS0h8P6RtS0RUpV+be0G4gN/cqPRsBbVMcN3sQgsV19GeLNlyEeNu7KXX oC4A== X-Forwarded-Encrypted: i=1; AJvYcCW10RVNNIGuiFUXng3fZKT0u6RCpDP/56wJ0wx7OUYW1tis8RHNy0kY0+chQXvJEPwK622NF9F82uYPjbw=@vger.kernel.org X-Gm-Message-State: AOJu0YxS9+OuWUeoyoTfCrsCxXNbyCdxul8MGlGcBHEX0pY+BfHgceG3 GXxdO8+XFysgJYXF9AXUz0rkhIeHcKpWDAxdE9fL5XzkSDze/MoaTUAVsi76IbEkfs5O/1qmj48 9K8530okZ/FQvEL5R03Q3SA5ws/sn73A3x1qbKGe4TUEmAvBcrcCHbW8ZmnM= X-Google-Smtp-Source: AGHT+IHre4HCgG9GhvCzJ0gFY0mlLiuN0+e+eYoIL2GvRl8FPVjZMC7Eur1YKvNmwVrxt2BFGjOPilXW+o48jPUq2OZKPCwspRhH Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6e02:1a61:b0:433:6c42:1817 with SMTP id e9e14a558f8ab-4348c878307mr2690715ab.6.1763052273319; Thu, 13 Nov 2025 08:44:33 -0800 (PST) Date: Thu, 13 Nov 2025 08:44:33 -0800 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <69160af1.050a0220.3565dc.002d.GAE@google.com> Subject: [syzbot] [mm?] WARNING in __page_table_check_ptes_set (3) From: syzbot To: akpm@linux-foundation.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, pasha.tatashin@soleen.com, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: 439fc29dfd3b Merge tag 'drm-fixes-2025-11-09' of https://g.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=15484412580000 kernel config: https://syzkaller.appspot.com/x/.config?x=e46b8a1c645465a9 dashboard link: https://syzkaller.appspot.com/bug?extid=18d274a59b87cf80e86d compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 userspace arch: i386 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/87634fccbb6c/disk-439fc29d.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/4d7897eed027/vmlinux-439fc29d.xz kernel image: https://storage.googleapis.com/syzbot-assets/388814b7d484/bzImage-439fc29d.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+18d274a59b87cf80e86d@syzkaller.appspotmail.com ------------[ cut here ]------------ WARNING: CPU: 0 PID: 23212 at mm/page_table_check.c:191 page_table_check_pte_flags mm/page_table_check.c:191 [inline] WARNING: CPU: 0 PID: 23212 at mm/page_table_check.c:191 __page_table_check_ptes_set+0x13e/0x2f0 mm/page_table_check.c:204 Modules linked in: CPU: 0 UID: 0 PID: 23212 Comm: syz.0.4613 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025 RIP: 0010:page_table_check_pte_flags mm/page_table_check.c:191 [inline] RIP: 0010:__page_table_check_ptes_set+0x13e/0x2f0 mm/page_table_check.c:204 Code: b8 00 00 00 00 00 00 00 70 49 39 c7 74 21 48 b8 00 00 00 00 00 00 00 6c 49 39 c7 75 1d e8 3a 29 8f ff eb 10 e8 33 29 8f ff 90 <0f> 0b 90 eb 10 e8 28 29 8f ff 90 0f 0b 90 eb 05 e8 1d 29 8f ff 31 RSP: 0000:ffffc9000fd27990 EFLAGS: 00010287 RAX: ffffffff8230ea9d RBX: 00000000397c2c67 RCX: 0000000000080000 RDX: ffffc9000c8da000 RSI: 00000000000042d3 RDI: 00000000000042d4 RBP: 0000000000000001 R08: ffffea0000e5f087 R09: 1ffffd40001cbe10 R10: dffffc0000000000 R11: fffff940001cbe11 R12: 0000000000000001 R13: 00000000397c2c67 R14: ffff8880525baff0 R15: ffff88801a05ab00 FS: 0000000000000000(0000) GS:ffff88812613b000(0063) knlGS:00000000f54bdb40 CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 CR2: 0000000080ffe000 CR3: 0000000077a7e000 CR4: 00000000003526f0 Call Trace: page_table_check_ptes_set include/linux/page_table_check.h:76 [inline] set_ptes include/linux/pgtable.h:292 [inline] do_swap_page+0x5248/0x5b20 mm/memory.c:4970 handle_pte_fault mm/memory.c:6180 [inline] __handle_mm_fault+0xe55/0x5400 mm/memory.c:6318 handle_mm_fault+0x40a/0x8e0 mm/memory.c:6487 do_user_addr_fault+0xa7c/0x1380 arch/x86/mm/fault.c:1336 handle_page_fault arch/x86/mm/fault.c:1476 [inline] exc_page_fault+0x82/0x100 arch/x86/mm/fault.c:1532 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:618 RIP: 0023:0xf70ef1f0 Code: 50 6a 00 e8 c2 10 14 00 8b 5c 24 2c 8b 4c 24 28 83 c4 20 8b 55 40 89 03 03 11 85 f6 74 18 31 c0 8d b4 26 00 00 00 00 8d 76 00 <89> 02 83 c0 01 83 c2 04 39 c6 75 f4 83 c4 1c 89 f8 5b 5e 5f 5d c3 RSP: 002b:00000000f54bd540 EFLAGS: 00010202 RAX: 0000000000000800 RBX: 00000000800000c0 RCX: 0000000080000000 RDX: 0000000080ffdfff RSI: 0000000000000efe RDI: 0000000000000008 RBP: 0000000080000140 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 ---------------- Code disassembly (best guess): 0: 50 push %rax 1: 6a 00 push $0x0 3: e8 c2 10 14 00 call 0x1410ca 8: 8b 5c 24 2c mov 0x2c(%rsp),%ebx c: 8b 4c 24 28 mov 0x28(%rsp),%ecx 10: 83 c4 20 add $0x20,%esp 13: 8b 55 40 mov 0x40(%rbp),%edx 16: 89 03 mov %eax,(%rbx) 18: 03 11 add (%rcx),%edx 1a: 85 f6 test %esi,%esi 1c: 74 18 je 0x36 1e: 31 c0 xor %eax,%eax 20: 8d b4 26 00 00 00 00 lea 0x0(%rsi,%riz,1),%esi 27: 8d 76 00 lea 0x0(%rsi),%esi * 2a: 89 02 mov %eax,(%rdx) <-- trapping instruction 2c: 83 c0 01 add $0x1,%eax 2f: 83 c2 04 add $0x4,%edx 32: 39 c6 cmp %eax,%esi 34: 75 f4 jne 0x2a 36: 83 c4 1c add $0x1c,%esp 39: 89 f8 mov %edi,%eax 3b: 5b pop %rbx 3c: 5e pop %rsi 3d: 5f pop %rdi 3e: 5d pop %rbp 3f: c3 ret --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@googlegroups.com. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. If the report is already addressed, let syzbot know by replying with: #syz fix: exact-commit-title If you want to overwrite report's subsystems, reply with: #syz set subsystems: new-subsystem (See the list of subsystem names on the web dashboard) If the report is a duplicate of another one, reply with: #syz dup: exact-subject-of-another-report If you want to undo deduplication, reply with: #syz undup