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 X-Spam-Level: X-Spam-Status: No, score=-4.0 required=3.0 tests=BAYES_00,FROM_LOCAL_HEX, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 4C2BCC433E5 for ; Thu, 16 Jul 2020 06:49:26 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 32A8B206F5 for ; Thu, 16 Jul 2020 06:49:26 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728232AbgGPGtY (ORCPT ); Thu, 16 Jul 2020 02:49:24 -0400 Received: from mail-io1-f72.google.com ([209.85.166.72]:49191 "EHLO mail-io1-f72.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728202AbgGPGtV (ORCPT ); Thu, 16 Jul 2020 02:49:21 -0400 Received: by mail-io1-f72.google.com with SMTP id l7so2977035ioq.16 for ; Wed, 15 Jul 2020 23:49:21 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:date:message-id:subject:from:to; bh=UBM1ZQ1vxsrt5dmWmOn+Igq2ZFK6NeciJNL2ibwCIE8=; b=b0uO4L27C2b19ZV2OQCOQjfr6xtFhBrf2kOisl6tsxL38win2s6zC0JEm123ozVHyf jCOjA28+uwvZPH4wdcUrw9be+W0Z0nAi/6ALHd6E9UN5A+SuE638wIdVRiiTB6GIzRdv +T2DLgWJD/q7zG+M/386gq4e5HTZ3Mcd5OgdTIdyTl9onKwddhi0cj0lVDF6z49N2Fiz sDiL9WUSH+1uKTpivaDX4wxnmBIFl5k8NGRzFn1KGCjbf+LvHJaPOk8XgnWMLFXIL6m/ j/nxK7qtCiLw5kty6cAQnUYxQGPb8IAOVdlo/XtRmBr8+ZivAbd8nKbf7bB9U3xzXvD7 EXAA== X-Gm-Message-State: AOAM532dVdT98nyao9D389qxKxpAQwGyAE7it9N6aiRRHznAwP8/LYzS jHpd62iZYj6RTHclpGZnOilkl6E6/Ux2T0PSNNTDxJ4uCu/w X-Google-Smtp-Source: ABdhPJz6w8MmiNs2Rg3hqRlaVwKidNkc8SOw4i2Ri5cbjsCduwfVpLy8C/8boBtoDcHHmu97cv80sK6BGRHxc9sP91GzOLr3oDKX MIME-Version: 1.0 X-Received: by 2002:a05:6602:229a:: with SMTP id d26mr3098830iod.57.1594882160875; Wed, 15 Jul 2020 23:49:20 -0700 (PDT) Date: Wed, 15 Jul 2020 23:49:20 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000a8634905aa897000@google.com> Subject: KASAN: user-memory-access Read in filp_close (2) From: syzbot To: linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com, viro@zeniv.linux.org.uk Content-Type: text/plain; charset="UTF-8" Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hello, syzbot found the following issue on: HEAD commit: d31958b3 Add linux-next specific files for 20200710 git tree: linux-next console output: https://syzkaller.appspot.com/x/log.txt?x=11cbc800900000 kernel config: https://syzkaller.appspot.com/x/.config?x=3fe4fccb94cbc1a6 dashboard link: https://syzkaller.appspot.com/bug?extid=5ec02913b4e4d22f3045 compiler: gcc (GCC) 10.1.0-syz 20200507 Unfortunately, I don't have any reproducer for this issue yet. IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+5ec02913b4e4d22f3045@syzkaller.appspotmail.com ================================================================== BUG: KASAN: user-memory-access in instrument_atomic_read include/linux/instrumented.h:56 [inline] BUG: KASAN: user-memory-access in atomic64_read include/asm-generic/atomic-instrumented.h:837 [inline] BUG: KASAN: user-memory-access in atomic_long_read include/asm-generic/atomic-long.h:29 [inline] BUG: KASAN: user-memory-access in filp_close+0x22/0x170 fs/open.c:1270 Read of size 8 at addr 00000000070007ef by task syz-executor.1/14036 CPU: 0 PID: 14036 Comm: syz-executor.1 Not tainted 5.8.0-rc4-next-20200710-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x18f/0x20d lib/dump_stack.c:118 __kasan_report mm/kasan/report.c:517 [inline] kasan_report.cold+0x5/0x37 mm/kasan/report.c:530 check_memory_region_inline mm/kasan/generic.c:186 [inline] check_memory_region+0x13d/0x180 mm/kasan/generic.c:192 instrument_atomic_read include/linux/instrumented.h:56 [inline] atomic64_read include/asm-generic/atomic-instrumented.h:837 [inline] atomic_long_read include/asm-generic/atomic-long.h:29 [inline] filp_close+0x22/0x170 fs/open.c:1270 __close_fd+0x2f/0x50 fs/file.c:671 __do_sys_close fs/open.c:1295 [inline] __se_sys_close fs/open.c:1293 [inline] __x64_sys_close+0x69/0x100 fs/open.c:1293 do_syscall_64+0x60/0xe0 arch/x86/entry/common.c:384 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x416721 Code: Bad RIP value. RSP: 002b:00007fff8ed6e800 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 RAX: ffffffffffffffda RBX: 0000000000000008 RCX: 0000000000416721 RDX: 0000000000000000 RSI: 000000000000023e RDI: 0000000000000007 RBP: 0000000000000001 R08: 000000003293423e R09: 0000000032934242 R10: 00007fff8ed6e8f0 R11: 0000000000000293 R12: 000000000078c900 R13: 000000000078c900 R14: ffffffffffffffff R15: 000000000078c04c ================================================================== --- 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.