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 5E875C433F5 for ; Fri, 22 Apr 2022 02:40:28 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1443472AbiDVCnR (ORCPT ); Thu, 21 Apr 2022 22:43:17 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:40112 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1443450AbiDVCm6 (ORCPT ); Thu, 21 Apr 2022 22:42:58 -0400 Received: from mail-il1-f198.google.com (mail-il1-f198.google.com [209.85.166.198]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E3026627F for ; Thu, 21 Apr 2022 19:40:06 -0700 (PDT) Received: by mail-il1-f198.google.com with SMTP id y19-20020a056e02119300b002c2d3ef05bfso3632602ili.18 for ; Thu, 21 Apr 2022 19:40:06 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:mime-version:date:in-reply-to:message-id:subject :from:to; bh=0E1wTgmw4tAhJxDZt8mvnlOyonouEGkIe5cDD3EeSIk=; b=Faz+B5vitLxgmZ4WT534YS0Swj5c+1fjgzgOloQK/WgBymwCJXMMDStaZJ+CZXCdQ3 hLzzX8RW57TIoN/j6WTRluAvhOnv3EqLIOBLg8ef0p0mUYHeYtU+9lSVh8tSS3R3Ubq6 5hATNJHKvyqNr3ostcPf6L+VLRZ5pMqrsdcvRgujQPL4REn8ta5AtEjnjA2h8ma0BohY Dwzb2g8qKwcptFSci2Q/3sSGXNwU6V5y17Tfwv3vkjalDLun/QM81/nyjTProIENjiUO /fM5QxvfNoB9khCqWdb1NTZPvwdGQTHn79LAGhpYZKXOcy7LxyYXn/hfwXIwtTriosJc 45/w== X-Gm-Message-State: AOAM531UOb7H8NUs01D/DHCsK4SciQkGwISpmfyEI8uosfrjSdP2wzyJ HfcJ9tZJesnPuk/WGMBxyu+JgxnBZVfTQHoatPUaxcxrBW2J X-Google-Smtp-Source: ABdhPJyuXAIKd5sEJnop+a/QplH1hLkVCQWaCfQdy0XpRMkfSD5Ic+Ovnmcc+ECGIefpGm4NenK/sii6s12XCim/oMcYqYXn+mDk MIME-Version: 1.0 X-Received: by 2002:a05:6638:24d6:b0:323:cda4:170d with SMTP id y22-20020a05663824d600b00323cda4170dmr1148106jat.269.1650595206316; Thu, 21 Apr 2022 19:40:06 -0700 (PDT) Date: Thu, 21 Apr 2022 19:40:06 -0700 In-Reply-To: <20220422023004.2640-1-hdanton@sina.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000f0c6aa05dd3524de@google.com> Subject: Re: [syzbot] kernel BUG in __filemap_get_folio From: syzbot To: hdanton@sina.com, 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: kernel BUG in __filemap_get_folio debug_vm_pgtable+0x2a51/0x2ae3 mm/debug_vm_pgtable.c:1332 do_one_initcall+0x103/0x650 init/main.c:1298 do_initcall_level init/main.c:1371 [inline] do_initcalls init/main.c:1387 [inline] do_basic_setup init/main.c:1406 [inline] kernel_init_freeable+0x6b1/0x73a init/main.c:1613 kernel_init+0x1a/0x1d0 init/main.c:1502 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298 ------------[ cut here ]------------ kernel BUG at mm/filemap.c:1973! invalid opcode: 0000 [#1] PREEMPT SMP KASAN CPU: 1 PID: 4328 Comm: syz-executor.3 Not tainted 5.18.0-rc3-syzkaller-00007-g559089e0a93d-dirty #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:__filemap_get_folio+0x8e7/0x10f0 mm/filemap.c:1973 Code: 4f f9 d8 ff 31 ff 89 ee e8 26 fd d8 ff 40 84 ed 0f 85 a3 fb ff ff e8 38 f9 d8 ff 48 c7 c6 80 d9 d5 89 48 89 df e8 d9 92 0e 00 <0f> 0b e8 22 f9 d8 ff 48 89 df e8 ea a6 03 00 e9 b3 fb ff ff e8 10 RSP: 0018:ffffc90003bcf8b0 EFLAGS: 00010293 RAX: 0000000000000000 RBX: ffffea00017a8e00 RCX: 0000000000000000 RDX: ffff888070958080 RSI: ffffffff819f54e7 RDI: 0000000000000003 RBP: 0000000000000000 R08: 0000000000000018 R09: 00000000ffffffff R10: ffffffff891d5eec R11: 00000000ffffffff R12: 00000000000001c0 R13: 0000000000000182 R14: dffffc0000000000 R15: 0000000000000001 FS: 00007f882e7ff700(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffcfb963000 CR3: 000000006e26f000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: pagecache_get_page+0x2e/0x290 mm/folio-compat.c:126 shmem_getpage_gfp+0x471/0x2370 mm/shmem.c:1812 shmem_getpage mm/shmem.c:149 [inline] shmem_write_begin+0xff/0x1e0 mm/shmem.c:2446 generic_perform_write+0x249/0x560 mm/filemap.c:3789 __generic_file_write_iter+0x2aa/0x4d0 mm/filemap.c:3917 generic_file_write_iter+0xd7/0x220 mm/filemap.c:3949 call_write_iter include/linux/fs.h:2050 [inline] new_sync_write+0x38a/0x560 fs/read_write.c:504 vfs_write+0x7c0/0xac0 fs/read_write.c:591 ksys_write+0x127/0x250 fs/read_write.c:644 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7f882d6890e9 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 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f882e7ff168 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007f882d79bf60 RCX: 00007f882d6890e9 RDX: 000000000208e24b RSI: 0000000020000080 RDI: 0000000000000004 RBP: 00007f882d6e308d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffdca7b7e2f R14: 00007f882e7ff300 R15: 0000000000022000 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:__filemap_get_folio+0x8e7/0x10f0 mm/filemap.c:1973 Code: 4f f9 d8 ff 31 ff 89 ee e8 26 fd d8 ff 40 84 ed 0f 85 a3 fb ff ff e8 38 f9 d8 ff 48 c7 c6 80 d9 d5 89 48 89 df e8 d9 92 0e 00 <0f> 0b e8 22 f9 d8 ff 48 89 df e8 ea a6 03 00 e9 b3 fb ff ff e8 10 RSP: 0018:ffffc90003bcf8b0 EFLAGS: 00010293 RAX: 0000000000000000 RBX: ffffea00017a8e00 RCX: 0000000000000000 RDX: ffff888070958080 RSI: ffffffff819f54e7 RDI: 0000000000000003 RBP: 0000000000000000 R08: 0000000000000018 R09: 00000000ffffffff R10: ffffffff891d5eec R11: 00000000ffffffff R12: 00000000000001c0 R13: 0000000000000182 R14: dffffc0000000000 R15: 0000000000000001 FS: 00007f882e7ff700(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffcfb963000 CR3: 000000006e26f000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Tested on: commit: 559089e0 vmalloc: replace VM_NO_HUGE_VMAP with VM_ALLO.. git tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/ console output: https://syzkaller.appspot.com/x/log.txt?x=13406b44f00000 kernel config: https://syzkaller.appspot.com/x/.config?x=dd7c9a79dfcfa205 dashboard link: https://syzkaller.appspot.com/bug?extid=cf4cf13056f85dec2c40 compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2 patch: https://syzkaller.appspot.com/x/patch.diff?x=1705002cf00000