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=-5.7 required=3.0 tests=FROM_LOCAL_HEX, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING, 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 574FFC10F14 for ; Sun, 14 Apr 2019 20:06:16 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 3546320850 for ; Sun, 14 Apr 2019 20:06:16 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727329AbfDNUGO (ORCPT ); Sun, 14 Apr 2019 16:06:14 -0400 Received: from mail-it1-f199.google.com ([209.85.166.199]:50216 "EHLO mail-it1-f199.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727284AbfDNUGK (ORCPT ); Sun, 14 Apr 2019 16:06:10 -0400 Received: by mail-it1-f199.google.com with SMTP id k8so14674035itd.0 for ; Sun, 14 Apr 2019 13:06:09 -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=jz03t11ccWSz2vGVS2VwPYo/J5ue/SoQrG7djKidhog=; b=kECNO+k00PLpmNqsPLSeEso2xiBiA60RArVWyL7OKUm1vm499YN5pcUXJ6gFzFYQgP iBbbP3ZYA6cK05zoABDcsLwzSc0VC9Cnx9GVIDpE7+bs3UzB31KCznJofHC98z0DcKUE Gl0nVkxCPm4dolF351rNZGzVnOfICSxzzlhnjgLMkLTD5Vc7Nf4fBrDB3MRKKVULFz/l 5d3ng6SrfCmPrpFXLzuSoWRO93FVY2lqaH1ec3YCNoCbWCzqwNCGIjoHE+n4fWcahSLb xyxsN1GTJGs2syUC+SeiVf0l0Q6zWZ8KYwL/hkTDT6UCceIb2k8oW0P4WTldu0Zgq6rH zVXA== X-Gm-Message-State: APjAAAXpRllUzp6M+/l7dYf3Um6b2WhobvD8kmfVi7Qv/Xyx4npNA17x Tc1yDUrKG2DiQCpQg+H6m0ctJcOqo/BXxjphBbItmMUMz83Z X-Google-Smtp-Source: APXvYqxabh800sTRYTR4qosbLn+XK21HnJZd5Gzk6nXsXu9FmsPociNnNn8xxXag5PhhTXA1MtT7H1pPuqxyRb5dO2RZQRC/KhhJ MIME-Version: 1.0 X-Received: by 2002:a24:612:: with SMTP id 18mr5878395itv.9.1555272368962; Sun, 14 Apr 2019 13:06:08 -0700 (PDT) Date: Sun, 14 Apr 2019 13:06:08 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <00000000000014c6b305868311d3@google.com> Subject: KASAN: use-after-free Read in __video_do_ioctl From: syzbot To: andreyknvl@google.com, ezequiel@collabora.com, hans.verkuil@cisco.com, linux-kernel@vger.kernel.org, linux-media@vger.kernel.org, linux-usb@vger.kernel.org, mchehab@kernel.org, niklas.soderlund+renesas@ragnatech.se, paul.kocialkowski@bootlin.com, sakari.ailus@linux.intel.com, samitolvanen@google.com, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8"; format=flowed; delsp=yes Sender: linux-media-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org Hello, syzbot found the following crash on: HEAD commit: 9a33b369 usb-fuzzer: main usb gadget fuzzer driver git tree: https://github.com/google/kasan/tree/usb-fuzzer console output: https://syzkaller.appspot.com/x/log.txt?x=1317cedd200000 kernel config: https://syzkaller.appspot.com/x/.config?x=23e37f59d94ddd15 dashboard link: https://syzkaller.appspot.com/bug?extid=5b7575b3f6820232e17c 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+5b7575b3f6820232e17c@syzkaller.appspotmail.com radio-raremono 6-1:0.210: raremono_cmd_main failed (-71) radio-raremono 6-1:0.210: V4L2 device registered as radio32 usb 6-1: USB disconnect, device number 119 radio-raremono 6-1:0.210: Thanko's Raremono disconnected ================================================================== BUG: KASAN: use-after-free in __mutex_lock_common kernel/locking/mutex.c:1009 [inline] BUG: KASAN: use-after-free in __mutex_lock+0x11ad/0x12b0 kernel/locking/mutex.c:1072 Read of size 8 at addr ffff888097e94bf8 by task v4l_id/7329 CPU: 1 PID: 7329 Comm: v4l_id Not tainted 5.1.0-rc4-319354-g9a33b36 #3 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+0xe8/0x16e lib/dump_stack.c:113 print_address_description+0x6c/0x236 mm/kasan/report.c:187 kasan_report.cold+0x1a/0x3c mm/kasan/report.c:317 __mutex_lock_common kernel/locking/mutex.c:1009 [inline] __mutex_lock+0x11ad/0x12b0 kernel/locking/mutex.c:1072 __video_do_ioctl+0x5d2/0xb40 drivers/media/v4l2-core/v4l2-ioctl.c:2842 usb 5-1: Using ep0 maxpacket: 8 video_usercopy+0x44e/0xf00 drivers/media/v4l2-core/v4l2-ioctl.c:3056 v4l2_ioctl+0x14e/0x1a0 drivers/media/v4l2-core/v4l2-dev.c:364 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:509 [inline] do_vfs_ioctl+0xced/0x12f0 fs/ioctl.c:696 ksys_ioctl+0xa0/0xc0 fs/ioctl.c:713 __do_sys_ioctl fs/ioctl.c:720 [inline] __se_sys_ioctl fs/ioctl.c:718 [inline] __x64_sys_ioctl+0x74/0xb0 fs/ioctl.c:718 do_syscall_64+0xcf/0x4f0 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f582f197347 Code: 90 90 90 48 8b 05 f1 fa 2a 00 64 c7 00 26 00 00 00 48 c7 c0 ff ff ff ff c3 90 90 90 90 90 90 90 90 90 90 b8 10 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d c1 fa 2a 00 31 d2 48 29 c2 64 usb 5-1: config 0 has an invalid interface number: 85 but max is 0 RSP: 002b:00007ffda90c77a8 EFLAGS: 00000202 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007f582f197347 RDX: 00007ffda90c77b0 RSI: 0000000080685600 RDI: 0000000000000003 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000400884 R13: 00007ffda90c7900 R14: 0000000000000000 R15: 0000000000000000 Allocated by task 5: set_track mm/kasan/common.c:87 [inline] __kasan_kmalloc mm/kasan/common.c:497 [inline] __kasan_kmalloc.constprop.0+0xbf/0xd0 mm/kasan/common.c:470 slab_post_alloc_hook mm/slab.h:437 [inline] slab_alloc_node mm/slub.c:2756 [inline] __kmalloc_node_track_caller+0xf3/0x320 mm/slub.c:4372 alloc_dr drivers/base/devres.c:103 [inline] devm_kmalloc+0x8c/0x190 drivers/base/devres.c:793 devm_kzalloc include/linux/device.h:679 [inline] usb_raremono_probe+0x34/0x235 drivers/media/radio/radio-raremono.c:298 usb_probe_interface+0x31d/0x820 drivers/usb/core/driver.c:361 really_probe+0x2da/0xb10 drivers/base/dd.c:509 usb 5-1: config 0 has no interface number 0 driver_probe_device+0x21d/0x350 drivers/base/dd.c:671 __device_attach_driver+0x1d8/0x290 drivers/base/dd.c:778 bus_for_each_drv+0x163/0x1e0 drivers/base/bus.c:454 __device_attach+0x223/0x3a0 drivers/base/dd.c:844 bus_probe_device+0x1f1/0x2a0 drivers/base/bus.c:514 device_add+0xad2/0x16e0 drivers/base/core.c:2106 usb_set_configuration+0xdf7/0x1740 drivers/usb/core/message.c:2021 generic_probe+0xa2/0xda drivers/usb/core/generic.c:210 usb_probe_device+0xc0/0x150 drivers/usb/core/driver.c:266 really_probe+0x2da/0xb10 drivers/base/dd.c:509 driver_probe_device+0x21d/0x350 drivers/base/dd.c:671 __device_attach_driver+0x1d8/0x290 drivers/base/dd.c:778 bus_for_each_drv+0x163/0x1e0 drivers/base/bus.c:454 __device_attach+0x223/0x3a0 drivers/base/dd.c:844 usb 5-1: New USB device found, idVendor=04b3, idProduct=4001, bcdDevice= 1.10 bus_probe_device+0x1f1/0x2a0 drivers/base/bus.c:514 device_add+0xad2/0x16e0 drivers/base/core.c:2106 usb_new_device.cold+0x537/0xccf drivers/usb/core/hub.c:2534 usb 5-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 hub_port_connect drivers/usb/core/hub.c:5089 [inline] hub_port_connect_change drivers/usb/core/hub.c:5204 [inline] port_event drivers/usb/core/hub.c:5350 [inline] hub_event+0x138e/0x3b00 drivers/usb/core/hub.c:5432 process_one_work+0x90f/0x1580 kernel/workqueue.c:2269 worker_thread+0x9b/0xe20 kernel/workqueue.c:2415 kthread+0x313/0x420 kernel/kthread.c:253 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352 Freed by task 5: set_track mm/kasan/common.c:87 [inline] __kasan_slab_free+0x130/0x180 mm/kasan/common.c:459 slab_free_hook mm/slub.c:1429 [inline] slab_free_freelist_hook+0x5e/0x140 mm/slub.c:1456 usb 5-1: config 0 descriptor?? slab_free mm/slub.c:3003 [inline] kfree+0xce/0x290 mm/slub.c:3958 release_nodes+0x4ac/0x920 drivers/base/devres.c:508 devres_release_all+0x79/0xc8 drivers/base/devres.c:529 __device_release_driver drivers/base/dd.c:1086 [inline] device_release_driver_internal+0x23a/0x4f0 drivers/base/dd.c:1113 bus_remove_device+0x302/0x5c0 drivers/base/bus.c:556 device_del+0x467/0xb90 drivers/base/core.c:2269 usb_disable_device+0x242/0x790 drivers/usb/core/message.c:1235 usb-storage 5-1:0.85: USB Mass Storage device detected usb_disconnect+0x298/0x870 drivers/usb/core/hub.c:2197 hub_port_connect drivers/usb/core/hub.c:4940 [inline] hub_port_connect_change drivers/usb/core/hub.c:5204 [inline] port_event drivers/usb/core/hub.c:5350 [inline] hub_event+0xcd2/0x3b00 drivers/usb/core/hub.c:5432 usb-storage 5-1:0.85: Quirks match for vid 04b3 pid 4001: 2000 process_one_work+0x90f/0x1580 kernel/workqueue.c:2269 process_scheduled_works kernel/workqueue.c:2331 [inline] worker_thread+0x7b0/0xe20 kernel/workqueue.c:2417 kthread+0x313/0x420 kernel/kthread.c:253 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352 The buggy address belongs to the object at ffff888097e94400 which belongs to the cache kmalloc-4k of size 4096 The buggy address is located 2040 bytes inside of 4096-byte region [ffff888097e94400, ffff888097e95400) The buggy address belongs to the page: page:ffffea00025fa400 count:1 mapcount:0 mapping:ffff88812c3f4600 index:0x0 compound_mapcount: 0 flags: 0xfff00000010200(slab|head) raw: 00fff00000010200 dead000000000100 dead000000000200 ffff88812c3f4600 raw: 0000000000000000 0000000000070007 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff888097e94a80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888097e94b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb > ffff888097e94b80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff888097e94c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888097e94c80: 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.