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=-9.0 required=3.0 tests=BAYES_00,FROM_LOCAL_HEX, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=unavailable 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 EB894C433DF for ; Tue, 11 Aug 2020 17:01:40 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id BB7CF2076B for ; Tue, 11 Aug 2020 17:01:40 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729204AbgHKRBY (ORCPT ); Tue, 11 Aug 2020 13:01:24 -0400 Received: from mail-io1-f71.google.com ([209.85.166.71]:54057 "EHLO mail-io1-f71.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729128AbgHKRAV (ORCPT ); Tue, 11 Aug 2020 13:00:21 -0400 Received: by mail-io1-f71.google.com with SMTP id f22so10179106iof.20 for ; Tue, 11 Aug 2020 10:00:21 -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=gZgyni2GVSRYbWS9PH5RPXXStatdShT/Am/nC/on1wU=; b=Tw92VOWocqFyR7Z7wi5AS22hhxApYqgqEx6G86GwarCCFadBb3VjzJ1ulZoh7NIuXk QgT76hsnv0UsKf4rT8M6tANx6o7Wy25zv6SCQqxTCTy4w8kbBCzsv0L11PPKKTsOBVuJ YHs8WVDfu93I37vi4aAX8iXAxivooszLV9xT14nmx0gxMhqdlSm6fTKETbR+1Uj03xgE 8Z1g+4t37Dr4u6Qp/vuXDrrrQAOmSkFfVPBZfwVYsIITGo5EMSs1neEbA3eL4dfu/W+P TiGVbb3EjvMIVSos5EmpigJA1h7oBqLURT6pY7XUQXzfP9dsxsY9UjWKOIm9GgQ5Ld1E JhhQ== X-Gm-Message-State: AOAM531y/Uh4IsEEbDZtH/cR8n+0CQmJdMG9e5X1bPxYOzKYlUT2YZQs Gj/dGatBPqLFtInf3suNxbAdFUzp6vITjw9qmqKHmOeiWbfq X-Google-Smtp-Source: ABdhPJz1pliI1BOrZ+96rn0J2xfn79n1/E/FbQN1k0QqkVWljk/RNp2RC/UXhxEQMv88+KUaR4gwTJbwP2L0lzTvVuGkxRM+DF3w MIME-Version: 1.0 X-Received: by 2002:a05:6602:2f88:: with SMTP id u8mr23823093iow.210.1597165219516; Tue, 11 Aug 2020 10:00:19 -0700 (PDT) Date: Tue, 11 Aug 2020 10:00:19 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <0000000000008e983905ac9d0182@google.com> Subject: KASAN: use-after-free Read in rtl_fw_do_work From: syzbot To: andreyknvl@google.com, davem@davemloft.net, kuba@kernel.org, kvalo@codeaurora.org, linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org, linux-wireless@vger.kernel.org, netdev@vger.kernel.org, pkshih@realtek.com, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org Hello, syzbot found the following issue on: HEAD commit: 449dc8c9 Merge tag 'for-v5.9' of git://git.kernel.org/pub/.. git tree: https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing console output: https://syzkaller.appspot.com/x/log.txt?x=16cd1a26900000 kernel config: https://syzkaller.appspot.com/x/.config?x=6ef84fa8ee48e528 dashboard link: https://syzkaller.appspot.com/bug?extid=ff4b26b0bfbff2dc7960 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+ff4b26b0bfbff2dc7960@syzkaller.appspotmail.com usb 5-1: Direct firmware load for rtlwifi/rtl8192cufw.bin failed with error -2 ================================================================== BUG: KASAN: use-after-free in rtl_fw_do_work+0x407/0x430 drivers/net/wireless/realtek/rtlwifi/core.c:87 Read of size 8 at addr ffff8881cd72ff38 by task kworker/1:5/3068 CPU: 1 PID: 3068 Comm: kworker/1:5 Not tainted 5.8.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: events request_firmware_work_func Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0xf6/0x16e lib/dump_stack.c:118 print_address_description.constprop.0+0x1c/0x210 mm/kasan/report.c:383 __kasan_report mm/kasan/report.c:513 [inline] kasan_report.cold+0x37/0x7c mm/kasan/report.c:530 rtl_fw_do_work+0x407/0x430 drivers/net/wireless/realtek/rtlwifi/core.c:87 request_firmware_work_func+0x126/0x250 drivers/base/firmware_loader/main.c:1001 process_one_work+0x94c/0x15f0 kernel/workqueue.c:2269 worker_thread+0x64c/0x1120 kernel/workqueue.c:2415 kthread+0x392/0x470 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294 The buggy address belongs to the page: page:000000004712885d refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1cd72f flags: 0x200000000000000() raw: 0200000000000000 0000000000000000 ffffea000735cbc8 0000000000000000 raw: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8881cd72fe00: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ffff8881cd72fe80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff >ffff8881cd72ff00: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ^ ffff8881cd72ff80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ffff8881cd730000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ================================================================== --- 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.