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 A615535470C for ; Wed, 29 Oct 2025 17:59:28 +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=1761760772; cv=none; b=TuQf8/pxxonh/KGnWfe3wqLQ8osTTl/f3HrZ8ApxVBzv3T3T7UEsArhc+Tp8pQ7BIQlDjmpyCr0Y7qikdU1vlcyJjme4A5Ws4Es9NAESkGzrqT4AJ9BXouAat3jWmPx6iencSTnI/t7sjHTnCZx8bheTL92khNCFYDB61AQJQ+M= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1761760772; c=relaxed/simple; bh=Ol4R7q45Dof5qeZblWAc9NcOphWskOxj+hFs+8GzIfY=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=fr59+XXsCZiU6oONO5Juf7V+pGNrZN41XDt3tpRUoUV/YnALvbACQ58k1QyIzTWjdI1kzvUim0ugZz5Q6J5a8qkhS1EuVeWoBSj9wzaoTzttIUoR28j6j/ux/HRj3cY6gKXb91r4cCdGN4Akg493R7Xn9In6ogLwkIfaC/GLmAg= 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-432fb58f876so1695935ab.1 for ; Wed, 29 Oct 2025 10:59:28 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1761760767; x=1762365567; h=to:from:subject:message-id:date:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=o0mfO4AUVtUNaslHQlnN9Noi7qHI+LCieT2isRfktoA=; b=muvfyk3pKdUa1I3luKPpT3UWZYRwjmTAiGCccUO5TGcr/YM9VDPn2AKA2R9odce0kX ak2EQpoF7iPHAhaSrY3H6/NX/q7ge8BHL/7V7bffhs5aF6GuczMfMCAYJuYJlFJrxES2 /vHmegfrkwVpevaFCJxVZX1PcCd2/8JyzVxbuXpsreuxtduTSvvY5CbFfdWzD1kpQt1q jd1tk1t0x+lHOWcY7jFn35aZuVAv3Q6NPrBiJq1na3clYc8JVNEKJz/RC8M1Mie3EP71 NNZaCVJ3VvKxSdwJFNNjySbgTuaD4WEb9pDtiTwZwjmQ+4dXxOrTK0Ssp+UWcWezJU9X zlmw== X-Forwarded-Encrypted: i=1; AJvYcCWCHW9EEqXSNISjqd24DryAOLvkxMxXDaikBOWB8LztXC2I2/0jb5AjVT0U8AiggyWXuxU0z/R0zOYX0lo5@vger.kernel.org X-Gm-Message-State: AOJu0YxxiKGKs6z5ZSuLngMuLtTXVQfRNKTR0R5XtEZBtd0NUdo2go6H q1ozKo9tgDj+TZVnwWsxp2NW2Ejn+fduqZ0vn3GY4YNR4CkSbFGpKPEDZraTSfkffmrapNJBX+v guXsLfRBZkVBXzfYyYgM+zTCqip97hEDVLoY4Lanpa6jaYESn/+C2YBEHQwE= X-Google-Smtp-Source: AGHT+IHWHTapYXwG+QZsDG9gOligy56lMRNZxNzacUMpU0A/f+8QUABCo3xjrySms6k9ScgYzR4O69cW2l8fDAIkmC2lkrykLPyM Precedence: bulk X-Mailing-List: linux-fsdevel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6e02:1609:b0:42d:b5d0:1930 with SMTP id e9e14a558f8ab-4330154fb44mr4660275ab.23.1761760767655; Wed, 29 Oct 2025 10:59:27 -0700 (PDT) Date: Wed, 29 Oct 2025 10:59:27 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <690255ff.050a0220.32483.0218.GAE@google.com> Subject: [syzbot] [net?] kernel BUG in filemap_fault (3) From: syzbot To: akpm@linux-foundation.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, netdev@vger.kernel.org, syzkaller-bugs@googlegroups.com, willy@infradead.org Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: 72761a7e3122 Merge tag 'driver-core-6.18-rc3' of git://git.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=10241e7c580000 kernel config: https://syzkaller.appspot.com/x/.config?x=bd5b960ad8a33100 dashboard link: https://syzkaller.appspot.com/bug?extid=85cfa48c1a69a20ba5ed 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/7340e06c0904/disk-72761a7e.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/0391e601c303/vmlinux-72761a7e.xz kernel image: https://storage.googleapis.com/syzbot-assets/7744957ba534/bzImage-72761a7e.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+85cfa48c1a69a20ba5ed@syzkaller.appspotmail.com asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:618 page last free pid 50 tgid 50 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1394 [inline] free_unref_folios+0xdb3/0x14f0 mm/page_alloc.c:2963 folios_put_refs+0x584/0x670 mm/swap.c:1002 release_pages+0x4b4/0x520 mm/swap.c:1042 io_free_region+0xb4/0x270 io_uring/memmap.c:102 io_rings_free io_uring/io_uring.c:2770 [inline] io_ring_ctx_free+0x287/0x4e0 io_uring/io_uring.c:2864 io_ring_exit_work+0x8c4/0x930 io_uring/io_uring.c:3086 process_one_work kernel/workqueue.c:3263 [inline] process_scheduled_works+0xae1/0x17b0 kernel/workqueue.c:3346 worker_thread+0x8a0/0xda0 kernel/workqueue.c:3427 kthread+0x711/0x8a0 kernel/kthread.c:463 ret_from_fork+0x4bc/0x870 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 ------------[ cut here ]------------ kernel BUG at mm/filemap.c:3519! Oops: invalid opcode: 0000 [#1] SMP KASAN PTI CPU: 1 UID: 0 PID: 9010 Comm: syz.1.736 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025 RIP: 0010:filemap_fault+0x122c/0x12b0 mm/filemap.c:3519 Code: 38 c1 0f 8c 8e fc ff ff 4c 89 e7 e8 8e d8 2c 00 e9 81 fc ff ff e8 94 23 c7 ff 48 89 df 48 c7 c6 60 5b 74 8b e8 b5 0d 2f ff 90 <0f> 0b e8 7d 23 c7 ff 48 8b 3c 24 48 c7 c6 e0 61 74 8b e8 9d 0d 2f RSP: 0018:ffffc9000ef37a60 EFLAGS: 00010246 RAX: 50465a4911af7d00 RBX: ffffea00012c8500 RCX: 50465a4911af7d00 RDX: 0000000000000000 RSI: ffffffff8d8f29fa RDI: ffff88801fba5ac0 RBP: ffffc9000ef37b98 R08: ffff8880b8924293 R09: 1ffff11017124852 R10: dffffc0000000000 R11: ffffed1017124853 R12: dffffc0000000000 R13: 1ffffd40002590a1 R14: ffffea00012c8518 R15: ffffea00012c8508 FS: 0000000000000000(0000) GS:ffff88812623e000(0063) knlGS:000000005671e440 CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 CR2: 0000000080000000 CR3: 00000000301ae000 CR4: 00000000003526f0 Call Trace: __do_fault+0x138/0x390 mm/memory.c:5280 do_shared_fault mm/memory.c:5762 [inline] do_fault mm/memory.c:5836 [inline] do_pte_missing mm/memory.c:4361 [inline] handle_pte_fault mm/memory.c:6177 [inline] __handle_mm_fault+0x1847/0x5400 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: 0023:0xf704df88 Code: f8 09 f0 74 1d 89 f0 83 f0 01 09 f8 0f 85 3c 02 00 00 8b 44 24 20 0f c8 89 44 24 20 31 c0 89 44 24 24 8b 44 24 1c 8b 4c 24 20 <89> 08 e9 39 fb ff ff 0f b6 4c 24 08 8b 5c 24 28 89 cf c1 ef 05 83 RSP: 002b:00000000f750fa70 EFLAGS: 00010246 RAX: 0000000080000000 RBX: 0000000000000000 RCX: 0000000000000007 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 00000000f750fd98 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:filemap_fault+0x122c/0x12b0 mm/filemap.c:3519 Code: 38 c1 0f 8c 8e fc ff ff 4c 89 e7 e8 8e d8 2c 00 e9 81 fc ff ff e8 94 23 c7 ff 48 89 df 48 c7 c6 60 5b 74 8b e8 b5 0d 2f ff 90 <0f> 0b e8 7d 23 c7 ff 48 8b 3c 24 48 c7 c6 e0 61 74 8b e8 9d 0d 2f RSP: 0018:ffffc9000ef37a60 EFLAGS: 00010246 RAX: 50465a4911af7d00 RBX: ffffea00012c8500 RCX: 50465a4911af7d00 RDX: 0000000000000000 RSI: ffffffff8d8f29fa RDI: ffff88801fba5ac0 RBP: ffffc9000ef37b98 R08: ffff8880b8924293 R09: 1ffff11017124852 R10: dffffc0000000000 R11: ffffed1017124853 R12: dffffc0000000000 R13: 1ffffd40002590a1 R14: ffffea00012c8518 R15: ffffea00012c8508 FS: 0000000000000000(0000) GS:ffff88812623e000(0063) knlGS:000000005671e440 CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 CR2: 0000000080000000 CR3: 00000000301ae000 CR4: 00000000003526f0 ---------------- Code disassembly (best guess): 0: f8 clc 1: 09 f0 or %esi,%eax 3: 74 1d je 0x22 5: 89 f0 mov %esi,%eax 7: 83 f0 01 xor $0x1,%eax a: 09 f8 or %edi,%eax c: 0f 85 3c 02 00 00 jne 0x24e 12: 8b 44 24 20 mov 0x20(%rsp),%eax 16: 0f c8 bswap %eax 18: 89 44 24 20 mov %eax,0x20(%rsp) 1c: 31 c0 xor %eax,%eax 1e: 89 44 24 24 mov %eax,0x24(%rsp) 22: 8b 44 24 1c mov 0x1c(%rsp),%eax 26: 8b 4c 24 20 mov 0x20(%rsp),%ecx * 2a: 89 08 mov %ecx,(%rax) <-- trapping instruction 2c: e9 39 fb ff ff jmp 0xfffffb6a 31: 0f b6 4c 24 08 movzbl 0x8(%rsp),%ecx 36: 8b 5c 24 28 mov 0x28(%rsp),%ebx 3a: 89 cf mov %ecx,%edi 3c: c1 ef 05 shr $0x5,%edi 3f: 83 .byte 0x83 --- This report is generated by a bot. 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