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 382EAC433FF for ; Tue, 30 Jul 2019 12:28:14 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 0BE3F206E0 for ; Tue, 30 Jul 2019 12:28:14 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729526AbfG3M2I (ORCPT ); Tue, 30 Jul 2019 08:28:08 -0400 Received: from mail-io1-f70.google.com ([209.85.166.70]:37867 "EHLO mail-io1-f70.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728346AbfG3M2H (ORCPT ); Tue, 30 Jul 2019 08:28:07 -0400 Received: by mail-io1-f70.google.com with SMTP id v3so71274423ios.4 for ; Tue, 30 Jul 2019 05:28:07 -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=hZMo4mC2RIyBYAfOxySX5UABZRRMH2Q/dZ4zcgNImT8=; b=TM7kMBsa2Al+Iabfpy4yMNq0Om099ldQuHM8ubSLBUFPyLlFVd+R+WvnvWo36BDbfh T26o5J22dCMR2J6AIr/WCQeL/dzyJCw52fzka7GMa1W6r0yKWp/mj6GJmrOs3x9cQ7hf HZtcg2QmqzabcXFplCP2uNq/nkyGW53C6VqndzxZx9k5K8L9ukCQp6/uFoavOvH8aiuS WNdcLcQhOF4Vmz1ZxTsmtpz9PalwVjkDbbKu+qxL53Epjz1hc1jrdfALoFXnYxKjUugS q2Qp+J1+U8dbW5WbOvQqeHdFrVqG6unnDxuri6kJVJ7m0tRirRReytMzLMcCklAIQDFK LfSA== X-Gm-Message-State: APjAAAUhkcHXHBsD2bnU1fE3m3Fwy4G2wKOpfl2yf5Mw93waJugeB/YS V15FS2GTMYKjnslPAv/3A8EJOZ4Iubld/VDcVRN2KibJcOZ+ X-Google-Smtp-Source: APXvYqz9DN92bNusuAriRi22SyjDQxEx6rnZguhdzOOVXYpum2QebL80O/zC1jM1YPGv5w4HsMU3xQqZxOd+TwmYrgIkwg9N2DQI MIME-Version: 1.0 X-Received: by 2002:a05:6602:114:: with SMTP id s20mr62738414iot.122.1564489686756; Tue, 30 Jul 2019 05:28:06 -0700 (PDT) Date: Tue, 30 Jul 2019 05:28:06 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <00000000000008b8c6058ee52407@google.com> Subject: KASAN: slab-out-of-bounds Read in hidraw_ioctl 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: 7f7867ff 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=15e293c8600000 kernel config: https://syzkaller.appspot.com/x/.config?x=792eb47789f57810 dashboard link: https://syzkaller.appspot.com/bug?extid=5a6c4ec678a0c6ee84ba 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+5a6c4ec678a0c6ee84ba@syzkaller.appspotmail.com ================================================================== BUG: KASAN: slab-out-of-bounds in strlen+0x79/0x90 lib/string.c:525 Read of size 1 at addr ffff8881ca981f10 by task syz-executor.4/7644 CPU: 1 PID: 7644 Comm: syz-executor.4 Not tainted 5.3.0-rc2+ #23 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 strlen+0x79/0x90 lib/string.c:525 strlen include/linux/string.h:281 [inline] hidraw_ioctl+0x245/0xae0 drivers/hid/hidraw.c:446 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:509 [inline] do_vfs_ioctl+0xd2d/0x1330 fs/ioctl.c:696 ksys_ioctl+0x9b/0xc0 fs/ioctl.c:713 __do_sys_ioctl fs/ioctl.c:720 [inline] __se_sys_ioctl fs/ioctl.c:718 [inline] __x64_sys_ioctl+0x6f/0xb0 fs/ioctl.c:718 do_syscall_64+0xb7/0x580 arch/x86/entry/common.c:296 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x459829 Code: fd b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 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 0f 83 cb b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007fed5bb22c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000459829 RDX: 0000000020000180 RSI: 0000000080404805 RDI: 0000000000000003 RBP: 000000000075bfc8 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007fed5bb236d4 R13: 00000000004c21c6 R14: 00000000004d5528 R15: 00000000ffffffff Allocated by task 1607: save_stack+0x1b/0x80 mm/kasan/common.c:69 set_track mm/kasan/common.c:77 [inline] __kasan_kmalloc mm/kasan/common.c:487 [inline] __kasan_kmalloc.constprop.0+0xbf/0xd0 mm/kasan/common.c:460 kmalloc include/linux/slab.h:552 [inline] syslog_print kernel/printk/printk.c:1346 [inline] do_syslog kernel/printk/printk.c:1519 [inline] do_syslog+0x540/0x1380 kernel/printk/printk.c:1493 kmsg_read+0x8a/0xb0 fs/proc/kmsg.c:40 proc_reg_read+0x1c1/0x280 fs/proc/inode.c:223 __vfs_read+0x76/0x100 fs/read_write.c:425 vfs_read+0x1ea/0x430 fs/read_write.c:461 ksys_read+0x127/0x250 fs/read_write.c:587 do_syscall_64+0xb7/0x580 arch/x86/entry/common.c:296 entry_SYSCALL_64_after_hwframe+0x49/0xbe Freed by task 1607: save_stack+0x1b/0x80 mm/kasan/common.c:69 set_track mm/kasan/common.c:77 [inline] __kasan_slab_free+0x130/0x180 mm/kasan/common.c:449 slab_free_hook mm/slub.c:1423 [inline] slab_free_freelist_hook mm/slub.c:1470 [inline] slab_free mm/slub.c:3012 [inline] kfree+0xe4/0x2f0 mm/slub.c:3953 syslog_print kernel/printk/printk.c:1405 [inline] do_syslog kernel/printk/printk.c:1519 [inline] do_syslog+0x1098/0x1380 kernel/printk/printk.c:1493 kmsg_read+0x8a/0xb0 fs/proc/kmsg.c:40 proc_reg_read+0x1c1/0x280 fs/proc/inode.c:223 __vfs_read+0x76/0x100 fs/read_write.c:425 vfs_read+0x1ea/0x430 fs/read_write.c:461 ksys_read+0x127/0x250 fs/read_write.c:587 do_syscall_64+0xb7/0x580 arch/x86/entry/common.c:296 entry_SYSCALL_64_after_hwframe+0x49/0xbe The buggy address belongs to the object at ffff8881ca981b00 which belongs to the cache kmalloc-1k of size 1024 The buggy address is located 16 bytes to the right of 1024-byte region [ffff8881ca981b00, ffff8881ca981f00) The buggy address belongs to the page: page:ffffea00072a6000 refcount:1 mapcount:0 mapping:ffff8881da002280 index:0x0 compound_mapcount: 0 flags: 0x200000000010200(slab|head) raw: 0200000000010200 dead000000000100 dead000000000122 ffff8881da002280 raw: 0000000000000000 00000000000e000e 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8881ca981e00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff8881ca981e80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb > ffff8881ca981f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff8881ca981f80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff8881ca982000: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ================================================================== --- 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.