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 3DC1EC433FF for ; Tue, 6 Aug 2019 13:18:12 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 1D0722089E for ; Tue, 6 Aug 2019 13:18:12 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1732319AbfHFNSL (ORCPT ); Tue, 6 Aug 2019 09:18:11 -0400 Received: from mail-oi1-f200.google.com ([209.85.167.200]:46913 "EHLO mail-oi1-f200.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1731559AbfHFNSK (ORCPT ); Tue, 6 Aug 2019 09:18:10 -0400 Received: by mail-oi1-f200.google.com with SMTP id l15so34823281oic.13 for ; Tue, 06 Aug 2019 06:18:09 -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=zIP/7/kBh5cwARWCpWI2PG/2mjoUMpPazLjAdGSlZso=; b=H+AsS+Z/LVd8glOsDkCX5o4IA0qI8x4O1DjR2dRzlhyJkAKiliddRksF6kMGBCiOlJ mJdfsptdaDiLTbytaiZVJnmR8Ub0luaWTjIzpAaZ8vRDoHykbN18zxMkHK5/AZFfaegc gM7O/AaDOveql5qEFZRWoxqjgwOEfZxFhEiUxsS8OVQsmAVsxgDExTkL7B+Nt7Nxnom3 nXPcF+uXyP+6NyLHpKTRBFWvYdVRXGk8DWz4MJZ6f4N3UtYIa9OgltYq+5x2C9L5ALyT K2pZykf4gCGJ99n8gLWyUGfbzFT5/7jq9Ye1VNkOKdH+jYCaWq0nhjSYdtKM/6kaKVSG 0KAw== X-Gm-Message-State: APjAAAUXx/zNbMtwfo9kdALqHCMT8/Z3Vtg8gouab785iMPo5rJ5yOet ZROGQanshAIdzLk9ZcO/z6mvAHWRNVybOaP9hdMbmwgvVPp3 X-Google-Smtp-Source: APXvYqzdLq3LQvJtdWMYJwfRGfH7c3xB94MmSJPy5e1Nxac/pFzKwoYo3Sii3ayuyfbdOkhU3K9E4vCM1d2Brcp7rFQd4JVHyuUR MIME-Version: 1.0 X-Received: by 2002:a02:a703:: with SMTP id k3mr4112789jam.12.1565097488423; Tue, 06 Aug 2019 06:18:08 -0700 (PDT) Date: Tue, 06 Aug 2019 06:18:08 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000d6225c058f72a7df@google.com> Subject: KASAN: slab-out-of-bounds Read in usbhid_close 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: e96407b4 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=117a9f42600000 kernel config: https://syzkaller.appspot.com/x/.config?x=cfa2c18fb6a8068e dashboard link: https://syzkaller.appspot.com/bug?extid=3268ee512f866a903602 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+3268ee512f866a903602@syzkaller.appspotmail.com ================================================================== BUG: KASAN: slab-out-of-bounds in __lock_acquire+0x302a/0x3b50 kernel/locking/lockdep.c:3753 Read of size 8 at addr ffff8881ceab68a0 by task syz-executor.0/3352 CPU: 1 PID: 3352 Comm: syz-executor.0 Not tainted 5.3.0-rc2+ #25 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 __lock_acquire+0x302a/0x3b50 kernel/locking/lockdep.c:3753 lock_acquire+0x127/0x320 kernel/locking/lockdep.c:4412 __raw_spin_lock_irq include/linux/spinlock_api_smp.h:128 [inline] _raw_spin_lock_irq+0x2d/0x40 kernel/locking/spinlock.c:167 spin_lock_irq include/linux/spinlock.h:363 [inline] usbhid_close+0x51/0x210 drivers/hid/usbhid/hid-core.c:740 hid_hw_close+0xa8/0xd0 drivers/hid/hid-core.c:2046 drop_ref.part.0+0x32/0xe0 drivers/hid/hidraw.c:337 drop_ref drivers/hid/hidraw.c:360 [inline] hidraw_release+0x34f/0x440 drivers/hid/hidraw.c:356 __fput+0x2d7/0x840 fs/file_table.c:280 task_work_run+0x13f/0x1c0 kernel/task_work.c:113 exit_task_work include/linux/task_work.h:22 [inline] do_exit+0x8ef/0x2c50 kernel/exit.c:878 do_group_exit+0x125/0x340 kernel/exit.c:982 get_signal+0x466/0x23d0 kernel/signal.c:2728 do_signal+0x88/0x14e0 arch/x86/kernel/signal.c:815 exit_to_usermode_loop+0x1a2/0x200 arch/x86/entry/common.c:159 prepare_exit_to_usermode arch/x86/entry/common.c:194 [inline] syscall_return_slowpath arch/x86/entry/common.c:274 [inline] do_syscall_64+0x45f/0x580 arch/x86/entry/common.c:299 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x459829 Code: Bad RIP value. RSP: 002b:00007f123439dcf8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca RAX: fffffffffffffe00 RBX: 000000000075bf28 RCX: 0000000000459829 RDX: 0000000000000000 RSI: 0000000000000080 RDI: 000000000075bf28 RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000075bf2c R13: 00007ffe9281699f R14: 00007f123439e9c0 R15: 000000000075bf2c Allocated by task 0: (stack is not available) Freed by task 0: (stack is not available) The buggy address belongs to the object at ffff8881ceab6880 which belongs to the cache shmem_inode_cache of size 1168 The buggy address is located 32 bytes inside of 1168-byte region [ffff8881ceab6880, ffff8881ceab6d10) The buggy address belongs to the page: page:ffffea00073aad00 refcount:1 mapcount:0 mapping:ffff8881da115180 index:0x0 compound_mapcount: 0 flags: 0x200000000010200(slab|head) raw: 0200000000010200 dead000000000100 dead000000000122 ffff8881da115180 raw: 0000000000000000 00000000800c000c 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8881ceab6780: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff8881ceab6800: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc > ffff8881ceab6880: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff8881ceab6900: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff8881ceab6980: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ================================================================== --- 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.