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=-5.4 required=3.0 tests=FROM_LOCAL_HEX, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=ham 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 A3A5BC3A5A2 for ; Tue, 3 Sep 2019 12:08:38 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 8311A208E4 for ; Tue, 3 Sep 2019 12:08:38 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729254AbfICMIh (ORCPT ); Tue, 3 Sep 2019 08:08:37 -0400 Received: from mail-io1-f72.google.com ([209.85.166.72]:34363 "EHLO mail-io1-f72.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729140AbfICMIN (ORCPT ); Tue, 3 Sep 2019 08:08:13 -0400 Received: by mail-io1-f72.google.com with SMTP id t8so18365606ioj.1 for ; Tue, 03 Sep 2019 05:08:12 -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=/18hoELIwFfWayuMe37bW650zrx3Am+Qg6CVpoIp8nE=; b=WT32UNf9GIst9SLyXsxf1ycPB6+/4p+18POKLppUEp177WrM1BUqOW/e5ukaxf6Efu xWMQmIAp8Ph3TBJieEO5AA6y68k1GeoVegU82RbkT1CdJlGQbdXKs4cG06TzVndidHR2 S9wJ3ItURc1vUwnOAGTeHChGla/spmikae/21d2EnfiBT4O5X7S4JiD9LFC+9pJyCSUg T7ugMBE60uMmsRbwBweoIMg5JlztlPcZpA4Emu/0rqYCbRVkj6sUaRI6zVzPgexBCv/g Ip4mmfDPeUWs+g00p3nDsAHnHJNQMx17xHzG0pRepsaGONTB9ew+XzVLDB0GYcgxErBV 8wAQ== X-Gm-Message-State: APjAAAWlaa3XoJY6polFFqmkwhy+CtJih5Dp/FXTKcsfai2+aHMTeZ/K E4Tl5vGLyst1qffkHL1IbMo4A5QKm/LlxDRcfn/icnNarH5+ X-Google-Smtp-Source: APXvYqwqoWdMtAMj2/32maVkwo5FLKv+YZnJEB8f40gwMON8QPkcqYkWLn8KD2nmlC/P+lJsVa1UkjzobwBgy/ko8H7iQWeWuL3B MIME-Version: 1.0 X-Received: by 2002:a5d:804f:: with SMTP id b15mr7650166ior.92.1567512491967; Tue, 03 Sep 2019 05:08:11 -0700 (PDT) Date: Tue, 03 Sep 2019 05:08:11 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <00000000000043c9390591a4f14b@google.com> Subject: KASAN: use-after-free Write in usbhid_open From: syzbot To: andreyknvl@google.com, benjamin.tissoires@redhat.com, jikos@kernel.org, linux-input@vger.kernel.org, linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8"; format=flowed; delsp=yes Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hello, syzbot found the following crash on: HEAD commit: eea39f24 usb-fuzzer: main usb gadget fuzzer driver git tree: https://github.com/google/kasan.git usb-fuzzer console output: https://syzkaller.appspot.com/x/log.txt?x=16ab9982600000 kernel config: https://syzkaller.appspot.com/x/.config?x=d0c62209eedfd54e dashboard link: https://syzkaller.appspot.com/bug?extid=058e326a87dbb54f2426 compiler: gcc (GCC) 9.0.0 20181231 (experimental) Unfortunately, I don't have any reproducer for this crash yet. IMPORTANT: if you fix the bug, please add the following tag to the commit: Reported-by: syzbot+058e326a87dbb54f2426@syzkaller.appspotmail.com ================================================================== BUG: KASAN: use-after-free in clear_bit include/asm-generic/bitops-instrumented.h:56 [inline] BUG: KASAN: use-after-free in usbhid_open+0x263/0x390 drivers/hid/usbhid/hid-core.c:727 Write of size 8 at addr ffff8881c89228c0 by task syz-executor.1/10380 CPU: 0 PID: 10380 Comm: syz-executor.1 Not tainted 5.3.0-rc5+ #28 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+0xca/0x13e lib/dump_stack.c:113 print_address_description+0x6a/0x32c mm/kasan/report.c:351 __kasan_report.cold+0x1a/0x33 mm/kasan/report.c:482 kasan_report+0xe/0x12 mm/kasan/common.c:612 check_memory_region_inline mm/kasan/generic.c:185 [inline] check_memory_region+0x128/0x190 mm/kasan/generic.c:192 clear_bit include/asm-generic/bitops-instrumented.h:56 [inline] usbhid_open+0x263/0x390 drivers/hid/usbhid/hid-core.c:727 hid_hw_open+0xd2/0x160 drivers/hid/hid-core.c:2023 hidraw_open+0x256/0x740 drivers/hid/hidraw.c:288 chrdev_open+0x219/0x5c0 fs/char_dev.c:414 do_dentry_open+0x494/0x1120 fs/open.c:797 do_last fs/namei.c:3416 [inline] path_openat+0x1430/0x3f50 fs/namei.c:3533 do_filp_open+0x1a1/0x280 fs/namei.c:3563 do_sys_open+0x3c0/0x580 fs/open.c:1089 do_syscall_64+0xb7/0x580 arch/x86/entry/common.c:296 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x413761 Code: 75 14 b8 02 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 04 19 00 00 c3 48 83 ec 08 e8 0a fa ff ff 48 89 04 24 b8 02 00 00 00 0f 05 <48> 8b 3c 24 48 89 c2 e8 53 fa ff ff 48 89 d0 48 83 c4 08 48 3d 01 RSP: 002b:00007f50d4f077a0 EFLAGS: 00000293 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 6666666666666667 RCX: 0000000000413761 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00007f50d4f07850 RBP: 000000000075bf20 R08: 000000000000000f R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000293 R12: 00007f50d4f086d4 R13: 00000000004c8c86 R14: 00000000004dfc10 R15: 00000000ffffffff The buggy address belongs to the page: page:ffffea0007224880 refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 flags: 0x200000000000000() raw: 0200000000000000 0000000000000000 dead000000000122 0000000000000000 raw: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8881c8922780: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ffff8881c8922800: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff > ffff8881c8922880: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ^ ffff8881c8922900: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ffff8881c8922980: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ================================================================== --- This bug 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 bug report. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot.