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 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 BEFA2C3A5A0 for ; Mon, 19 Aug 2019 14:48:14 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 859692082A for ; Mon, 19 Aug 2019 14:48:14 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727753AbfHSOsN (ORCPT ); Mon, 19 Aug 2019 10:48:13 -0400 Received: from mail-io1-f69.google.com ([209.85.166.69]:51171 "EHLO mail-io1-f69.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727644AbfHSOsJ (ORCPT ); Mon, 19 Aug 2019 10:48:09 -0400 Received: by mail-io1-f69.google.com with SMTP id l7so4291439ion.17 for ; Mon, 19 Aug 2019 07:48:08 -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=Qjo/GFDuxdjJVvM5BrTeperU99qH1M/Y6Ls1Sq0DXUY=; b=G7t0r4Kh5vjp+HCcTsAg/q3Yn+tmuJ8rjOWHUf821ckjUMZvgDydRQV5x58F4V9+Gp jIiSaGsiWEjJll3DVUtV7jKYw/2wqk2xFJ8Sszig0dAgj9w+nFCMRw710GNhVQBYnS13 dvNd8oA/EkKCtspcSSeinKJmkvZFvbuQ2u5verSzVQ2Z4pjMTtVyD6hmhHQbNaUdK9Je dLM6Alczgdf1in2kbSYQVeiBiBOolep5aIFLX/c6TLMHA1M6e65MFdL2cxM6lPu/gINi +FwWZ7tkO2hDOKhpR/6iYyWXLdpXvFXlCHHZp40xX9fpqIq8BwFjV2yI1H4+kMrKfr5j ddKA== X-Gm-Message-State: APjAAAV8FWigreQR13flTkYSy6+SHnroUt3kumv5999nVSf3MGRtu4ER dzJpQOxCxB7sdQjrrsWApSXa6lwPXQeFKfcZEOUHzjcqwz2Z X-Google-Smtp-Source: APXvYqydgi5dT/FOiwFLEaKbmKKhilyrsphpg0m9pInOYBzYxLwltJrgGVFbj6P9l0h2Ty6XWuKhJ52gxiaw1Zcp6f9iGJAcbsfj MIME-Version: 1.0 X-Received: by 2002:a6b:3943:: with SMTP id g64mr20051636ioa.225.1566226088209; Mon, 19 Aug 2019 07:48:08 -0700 (PDT) Date: Mon, 19 Aug 2019 07:48:08 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000a039300590796dc4@google.com> Subject: KASAN: use-after-free Read in iowarrior_callback From: syzbot To: andreyknvl@google.com, gregkh@linuxfoundation.org, gustavo@embeddedor.com, keescook@chromium.org, linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org, oneukum@suse.com, 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: d0847550 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=11605772600000 kernel config: https://syzkaller.appspot.com/x/.config?x=dbc9c80cc095da19 dashboard link: https://syzkaller.appspot.com/bug?extid=1c7a8a0c02f8b83f3a67 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+1c7a8a0c02f8b83f3a67@syzkaller.appspotmail.com ================================================================== BUG: KASAN: use-after-free in iowarrior_callback.cold+0x4f/0x51 drivers/usb/misc/iowarrior.c:208 Read of size 8 at addr ffff8881d56b5208 by task udevd/4692 CPU: 1 PID: 4692 Comm: udevd Not tainted 5.3.0-rc4+ #26 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 iowarrior_callback.cold+0x4f/0x51 drivers/usb/misc/iowarrior.c:208 __usb_hcd_giveback_urb+0x1f2/0x470 drivers/usb/core/hcd.c:1657 usb_hcd_giveback_urb+0x368/0x420 drivers/usb/core/hcd.c:1722 dummy_timer+0x120f/0x2fa2 drivers/usb/gadget/udc/dummy_hcd.c:1965 call_timer_fn+0x179/0x650 kernel/time/timer.c:1322 expire_timers kernel/time/timer.c:1366 [inline] __run_timers kernel/time/timer.c:1685 [inline] __run_timers kernel/time/timer.c:1653 [inline] run_timer_softirq+0x5cc/0x14b0 kernel/time/timer.c:1698 __do_softirq+0x221/0x912 kernel/softirq.c:292 invoke_softirq kernel/softirq.c:373 [inline] irq_exit+0x178/0x1a0 kernel/softirq.c:413 exiting_irq arch/x86/include/asm/apic.h:537 [inline] smp_apic_timer_interrupt+0x12f/0x500 arch/x86/kernel/apic/apic.c:1095 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:830 RIP: 0010:__sanitizer_cov_trace_const_cmp1+0x0/0x20 kernel/kcov.c:247 Code: 66 2e 0f 1f 84 00 00 00 00 00 48 8b 0c 24 48 89 f2 48 89 fe bf 06 00 00 00 e9 2c ff ff ff 66 90 66 2e 0f 1f 84 00 00 00 00 00 <48> 8b 0c 24 40 0f b6 d6 40 0f b6 f7 bf 01 00 00 00 e9 0a ff ff ff RSP: 0018:ffff8881c9397b20 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 RAX: 00000000c9397c01 RBX: ffff8881c9397c00 RCX: ffffffff816a906f RDX: 0000000000000000 RSI: 00000000c9397c01 RDI: 0000000000000000 RBP: 00000000c9397c01 R08: ffff8881b05fc800 R09: ffffed103b0df2a5 R10: ffffed103b0df2a4 R11: ffff8881d86f9523 R12: ffff8881c9397c08 R13: ffff8881c9397c38 R14: ffff8881d86f94a0 R15: ffff8881c9397c40 unlazy_walk+0x116/0x550 fs/namei.c:675 complete_walk+0xc6/0x240 fs/namei.c:788 path_parentat.isra.0+0x8c/0x160 fs/namei.c:2366 filename_parentat.isra.0+0x19c/0x410 fs/namei.c:2386 do_renameat2+0x193/0xbb0 fs/namei.c:4545 __do_sys_rename fs/namei.c:4673 [inline] __se_sys_rename fs/namei.c:4671 [inline] __x64_sys_rename+0x5d/0x80 fs/namei.c:4671 do_syscall_64+0xb7/0x580 arch/x86/entry/common.c:296 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7fb52199e527 Code: 32 00 64 83 38 15 74 07 b8 ff ff ff ff 5b c3 48 89 df e8 1c c1 07 00 85 c0 75 ed 31 c0 eb d3 90 90 90 90 b8 52 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d e1 f8 32 00 31 d2 48 29 c2 64 RSP: 002b:00007ffe94095c28 EFLAGS: 00000246 ORIG_RAX: 0000000000000052 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fb52199e527 RDX: 00007fb521ccfe98 RSI: 00007ffe94095c60 RDI: 00007ffe94096060 RBP: 000000000127daa0 R08: 00007fb5223117a0 R09: 0000000001278560 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000127aec0 R13: 000000000126a250 R14: 00007ffe94095c60 R15: 0000000000000001 Allocated by task 12: 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] kzalloc include/linux/slab.h:748 [inline] iowarrior_probe+0x7a/0x10b2 drivers/usb/misc/iowarrior.c:753 usb_probe_interface+0x305/0x7a0 drivers/usb/core/driver.c:361 really_probe+0x281/0x6d0 drivers/base/dd.c:548 driver_probe_device+0x101/0x1b0 drivers/base/dd.c:721 __device_attach_driver+0x1c2/0x220 drivers/base/dd.c:828 bus_for_each_drv+0x162/0x1e0 drivers/base/bus.c:454 __device_attach+0x217/0x360 drivers/base/dd.c:894 bus_probe_device+0x1e4/0x290 drivers/base/bus.c:514 device_add+0xae6/0x16f0 drivers/base/core.c:2165 usb_set_configuration+0xdf6/0x1670 drivers/usb/core/message.c:2023 generic_probe+0x9d/0xd5 drivers/usb/core/generic.c:210 usb_probe_device+0x99/0x100 drivers/usb/core/driver.c:266 really_probe+0x281/0x6d0 drivers/base/dd.c:548 driver_probe_device+0x101/0x1b0 drivers/base/dd.c:721 __device_attach_driver+0x1c2/0x220 drivers/base/dd.c:828 bus_for_each_drv+0x162/0x1e0 drivers/base/bus.c:454 __device_attach+0x217/0x360 drivers/base/dd.c:894 bus_probe_device+0x1e4/0x290 drivers/base/bus.c:514 device_add+0xae6/0x16f0 drivers/base/core.c:2165 usb_new_device.cold+0x6a4/0xe79 drivers/usb/core/hub.c:2536 hub_port_connect drivers/usb/core/hub.c:5098 [inline] hub_port_connect_change drivers/usb/core/hub.c:5213 [inline] port_event drivers/usb/core/hub.c:5359 [inline] hub_event+0x1b5c/0x3640 drivers/usb/core/hub.c:5441 process_one_work+0x92b/0x1530 kernel/workqueue.c:2269 worker_thread+0x96/0xe20 kernel/workqueue.c:2415 kthread+0x318/0x420 kernel/kthread.c:255 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352 Freed by task 12: 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:1474 [inline] slab_free mm/slub.c:3016 [inline] kfree+0xe4/0x2f0 mm/slub.c:3957 iowarrior_delete drivers/usb/misc/iowarrior.c:246 [inline] iowarrior_probe+0xbb4/0x10b2 drivers/usb/misc/iowarrior.c:852 usb_probe_interface+0x305/0x7a0 drivers/usb/core/driver.c:361 really_probe+0x281/0x6d0 drivers/base/dd.c:548 driver_probe_device+0x101/0x1b0 drivers/base/dd.c:721 __device_attach_driver+0x1c2/0x220 drivers/base/dd.c:828 bus_for_each_drv+0x162/0x1e0 drivers/base/bus.c:454 __device_attach+0x217/0x360 drivers/base/dd.c:894 bus_probe_device+0x1e4/0x290 drivers/base/bus.c:514 device_add+0xae6/0x16f0 drivers/base/core.c:2165 usb_set_configuration+0xdf6/0x1670 drivers/usb/core/message.c:2023 generic_probe+0x9d/0xd5 drivers/usb/core/generic.c:210 usb_probe_device+0x99/0x100 drivers/usb/core/driver.c:266 really_probe+0x281/0x6d0 drivers/base/dd.c:548 driver_probe_device+0x101/0x1b0 drivers/base/dd.c:721 __device_attach_driver+0x1c2/0x220 drivers/base/dd.c:828 bus_for_each_drv+0x162/0x1e0 drivers/base/bus.c:454 __device_attach+0x217/0x360 drivers/base/dd.c:894 bus_probe_device+0x1e4/0x290 drivers/base/bus.c:514 device_add+0xae6/0x16f0 drivers/base/core.c:2165 usb_new_device.cold+0x6a4/0xe79 drivers/usb/core/hub.c:2536 hub_port_connect drivers/usb/core/hub.c:5098 [inline] hub_port_connect_change drivers/usb/core/hub.c:5213 [inline] port_event drivers/usb/core/hub.c:5359 [inline] hub_event+0x1b5c/0x3640 drivers/usb/core/hub.c:5441 process_one_work+0x92b/0x1530 kernel/workqueue.c:2269 worker_thread+0x96/0xe20 kernel/workqueue.c:2415 kthread+0x318/0x420 kernel/kthread.c:255 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352 The buggy address belongs to the object at ffff8881d56b5180 which belongs to the cache kmalloc-512 of size 512 The buggy address is located 136 bytes inside of 512-byte region [ffff8881d56b5180, ffff8881d56b5380) The buggy address belongs to the page: page:ffffea000755ad00 refcount:1 mapcount:0 mapping:ffff8881da002500 index:0x0 compound_mapcount: 0 flags: 0x200000000010200(slab|head) raw: 0200000000010200 ffffea000757ad00 0000000300000003 ffff8881da002500 raw: 0000000000000000 00000000800c000c 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8881d56b5100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff8881d56b5180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb > ffff8881d56b5200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff8881d56b5280: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff8881d56b5300: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ================================================================== --- This bug is generated by a bot. 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