From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 81803C4332F for ; Tue, 14 Nov 2023 18:49:09 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233971AbjKNStK (ORCPT ); Tue, 14 Nov 2023 13:49:10 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:38608 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233935AbjKNStJ (ORCPT ); Tue, 14 Nov 2023 13:49:09 -0500 Received: from mail-pl1-f200.google.com (mail-pl1-f200.google.com [209.85.214.200]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 55560FA for ; Tue, 14 Nov 2023 10:49:06 -0800 (PST) Received: by mail-pl1-f200.google.com with SMTP id d9443c01a7336-1cc0e3a2b6eso63802075ad.3 for ; Tue, 14 Nov 2023 10:49:06 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1699987746; x=1700592546; 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=HT+yXdfhO+0A5TqXgo1XdwiEqjD57vxnZV2hKKHD+aA=; b=s57nT69oHDhMT3WvLo+6JQu6nmU04OdLpf5tUjikrpesoyngccWKTQvnBzl9i1YdoV 34o6l8ml/pgfFeXNpQ/VEH1xlVbqn9sfQOEqIfvxBqc3Ff0xVuvE/DdBwNevHhhxvYo3 1q37ZOhhY11su5XIExwbWxIab2aWS3p5OJxV5AwKpVfLl+Ujsjkz4VABv/vnE3bRnNGQ 0SgU70TCxwbaUTeYZ2iYTVlyC0fh/9vz+1Twx6EDa+lRxIUFq59vbR6sNxQNYoa7PCfR HemCS3KQ5HbhhfjUANEDcx6cppweUmg/YYX/IW9v9hCUIbJTQZNkocl+j4DQ1m/HOqEH xBGQ== X-Gm-Message-State: AOJu0YwaDaQQpdJKsCYrtrAURWXMl4XgsCgDvw93cILG2icyPRzEMvVO lKUgMjkISffTuDEQsGZHFDmGsXeozuoe17Mb7To6BXew/8xa X-Google-Smtp-Source: AGHT+IGDSgAqFiFmKxknBVDq7xjynFu9n9RqXpGgxpRc3xARHq3ruQ3Wl3XDH+q145MB44iJT3XOL2eYM7AEAF8z5NA0MKZuABPy MIME-Version: 1.0 X-Received: by 2002:a17:902:efc2:b0:1cc:70f2:c1d5 with SMTP id ja2-20020a170902efc200b001cc70f2c1d5mr780490plb.11.1699987745870; Tue, 14 Nov 2023 10:49:05 -0800 (PST) Date: Tue, 14 Nov 2023 10:49:05 -0800 In-Reply-To: X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000b71a62060a213dfe@google.com> Subject: Re: [syzbot] [mm?] BUG: unable to handle kernel paging request in __pte_offset_map_lock From: syzbot To: jose.pekkarinen@foxhound.fi, linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hello, syzbot has tested the proposed patch but the reproducer is still triggering an issue: BUG: unable to handle kernel paging request in __pte_offset_map_lock Unable to handle kernel paging request at virtual address dfff800000000004 KASAN: null-ptr-deref in range [0x0000000000000020-0x0000000000000027] Mem abort info: ESR = 0x0000000096000005 EC = 0x25: DABT (current EL), IL = 32 bits SET = 0, FnV = 0 EA = 0, S1PTW = 0 FSC = 0x05: level 1 translation fault Data abort info: ISV = 0, ISS = 0x00000005, ISS2 = 0x00000000 CM = 0, WnR = 0, TnD = 0, TagAccess = 0 GCS = 0, Overlay = 0, DirtyBit = 0, Xs = 0 [dfff800000000004] address between user and kernel address ranges Internal error: Oops: 0000000096000005 [#1] PREEMPT SMP Modules linked in: CPU: 1 PID: 7876 Comm: syz-executor.4 Not tainted 6.7.0-rc1-syzkaller-dirty #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/09/2023 pstate: 804000c5 (Nzcv daIF +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : __lock_acquire+0x104/0x75e8 kernel/locking/lockdep.c:5004 lr : lock_acquire+0x23c/0x71c kernel/locking/lockdep.c:5753 sp : ffff800099b16d40 x29: ffff800099b17000 x28: ffff8000808f718c x27: ffff700013362e18 x26: 1ffff00011c62088 x25: 0000000000000000 x24: 0000000000000000 x23: ffff700013362dd0 x22: 0000000000000000 x21: 0000000000000000 x20: 0000000000000000 x19: 0000000000000022 x18: ffff800099b17750 x17: 0000000000000000 x16: ffff80008a7389ec x15: 0000000000000001 x14: ffff80008e310448 x13: ffff800099b16e80 x12: dfff800000000000 x11: ffff80008031ef10 x10: ffff80008e310444 x9 : 00000000000000f3 x8 : 0000000000000004 x7 : ffff8000808f718c x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000001 x3 : 0000000000000000 x2 : 0000000000000000 x1 : 0000000000000000 x0 : 0000000000000022 Call trace: __lock_acquire+0x104/0x75e8 kernel/locking/lockdep.c:5004 lock_acquire+0x23c/0x71c kernel/locking/lockdep.c:5753 __raw_spin_lock include/linux/spinlock_api_smp.h:133 [inline] _raw_spin_lock+0x48/0x60 kernel/locking/spinlock.c:154 spin_lock include/linux/spinlock.h:351 [inline] __pte_offset_map_lock+0x158/0x294 mm/pgtable-generic.c:375 pte_offset_map_lock include/linux/mm.h:2946 [inline] filemap_map_pages+0x5cc/0x112c mm/filemap.c:3531 do_fault_around mm/memory.c:4586 [inline] do_read_fault mm/memory.c:4619 [inline] do_fault mm/memory.c:4762 [inline] do_pte_missing mm/memory.c:3730 [inline] handle_pte_fault mm/memory.c:5038 [inline] __handle_mm_fault mm/memory.c:5179 [inline] handle_mm_fault+0x35ec/0x49f8 mm/memory.c:5344 faultin_page mm/gup.c:956 [inline] __get_user_pages+0x3e0/0xa24 mm/gup.c:1239 populate_vma_page_range+0x254/0x328 mm/gup.c:1677 __mm_populate+0x240/0x3d8 mm/gup.c:1786 mm_populate include/linux/mm.h:3379 [inline] vm_mmap_pgoff+0x2bc/0x3d4 mm/util.c:551 ksys_mmap_pgoff+0xd0/0x5b0 mm/mmap.c:1425 __do_sys_mmap arch/arm64/kernel/sys.c:28 [inline] __se_sys_mmap arch/arm64/kernel/sys.c:21 [inline] __arm64_sys_mmap+0xf8/0x110 arch/arm64/kernel/sys.c:21 __invoke_syscall arch/arm64/kernel/syscall.c:37 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:51 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:136 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:155 el0_svc+0x54/0x158 arch/arm64/kernel/entry-common.c:678 el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:696 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:595 Code: 900704a8 b9424108 34000208 d343fe68 (386c6908) ---[ end trace 0000000000000000 ]--- ---------------- Code disassembly (best guess): 0: 900704a8 adrp x8, 0xe094000 4: b9424108 ldr w8, [x8, #576] 8: 34000208 cbz w8, 0x48 c: d343fe68 lsr x8, x19, #3 * 10: 386c6908 ldrb w8, [x8, x12] <-- trapping instruction Tested on: commit: b85ea95d Linux 6.7-rc1 git tree: git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git console output: https://syzkaller.appspot.com/x/log.txt?x=1052c057680000 kernel config: https://syzkaller.appspot.com/x/.config?x=fffc11e84313b7c6 dashboard link: https://syzkaller.appspot.com/bug?extid=89edd67979b52675ddec compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 userspace arch: arm64 patch: https://syzkaller.appspot.com/x/patch.diff?x=1071c13f680000