linux-kernel - [syzbot] memory leak in usb_set

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Date:   Wed, 21 Apr 2021 08:12:18 -0700
From:   syzbot <syzbot+d1e69c888f0d3866ead4@...kaller.appspotmail.com>
To:     gregkh@...uxfoundation.org, johan@...nel.org,
        linux-kernel@...r.kernel.org, linux-usb@...r.kernel.org,
        mathias.nyman@...ux.intel.com, stern@...land.harvard.edu,
        syzkaller-bugs@...glegroups.com
Subject: [syzbot] memory leak in usb_set_configuration (2)

Hello,

syzbot found the following issue on:

HEAD commit:    9cdbf646 Merge tag 'io_uring-5.12-2021-04-16' of git://git..
git tree:       upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=136ce5a6d00000
kernel config:  https://syzkaller.appspot.com/x/.config?x=fd35e661e44323ea
dashboard link: https://syzkaller.appspot.com/bug?extid=d1e69c888f0d3866ead4
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=16ecba29d00000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=143cf955d00000

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+d1e69c888f0d3866ead4@...kaller.appspotmail.com

BUG: memory leak
unreferenced object 0xffff8881120e1400 (size 1024):
  comm "kworker/0:2", pid 3660, jiffies 4294952380 (age 24.950s)
  hex dump (first 32 bytes):
    c8 78 3c 12 81 88 ff ff c8 78 3c 12 81 88 ff ff  .x<......x<.....
    01 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
  backtrace:
    [<ffffffff82ba5d37>] kmalloc include/linux/slab.h:554 [inline]
    [<ffffffff82ba5d37>] kzalloc include/linux/slab.h:684 [inline]
    [<ffffffff82ba5d37>] usb_set_configuration+0x187/0xb90 drivers/usb/core/message.c:1992
    [<ffffffff82bb69ec>] usb_generic_driver_probe+0x8c/0xc0 drivers/usb/core/generic.c:238
    [<ffffffff82ba874c>] usb_probe_device+0x5c/0x140 drivers/usb/core/driver.c:293
    [<ffffffff825f67f9>] really_probe+0x159/0x4a0 drivers/base/dd.c:559
    [<ffffffff825f6bc4>] driver_probe_device+0x84/0x100 drivers/base/dd.c:745
    [<ffffffff825f72de>] __device_attach_driver+0xee/0x110 drivers/base/dd.c:851
    [<ffffffff825f3747>] bus_for_each_drv+0xb7/0x100 drivers/base/bus.c:431
    [<ffffffff825f6e72>] __device_attach+0x122/0x250 drivers/base/dd.c:919
    [<ffffffff825f53e6>] bus_probe_device+0xc6/0xe0 drivers/base/bus.c:491
    [<ffffffff825f1935>] device_add+0x5d5/0xc40 drivers/base/core.c:3242
    [<ffffffff841df2d9>] usb_new_device.cold+0x16a/0x582 drivers/usb/core/hub.c:2555
    [<ffffffff82b9b24e>] hub_port_connect drivers/usb/core/hub.c:5223 [inline]
    [<ffffffff82b9b24e>] hub_port_connect_change drivers/usb/core/hub.c:5363 [inline]
    [<ffffffff82b9b24e>] port_event drivers/usb/core/hub.c:5509 [inline]
    [<ffffffff82b9b24e>] hub_event+0x142e/0x20c0 drivers/usb/core/hub.c:5591
    [<ffffffff81259619>] process_one_work+0x2c9/0x600 kernel/workqueue.c:2275
    [<ffffffff81259f09>] worker_thread+0x59/0x5d0 kernel/workqueue.c:2421
    [<ffffffff81261638>] kthread+0x178/0x1b0 kernel/kthread.c:292
    [<ffffffff8100227f>] ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294

BUG: memory leak
unreferenced object 0xffff888110a217a0 (size 32):
  comm "kworker/0:2", pid 3660, jiffies 4294952380 (age 24.950s)
  hex dump (first 32 bytes):
    31 2d 31 3a 30 2e 32 34 31 00 00 00 00 00 00 00  1-1:0.241.......
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
  backtrace:
    [<ffffffff8223411c>] kvasprintf+0x6c/0xf0 lib/kasprintf.c:25
    [<ffffffff822341f8>] kvasprintf_const+0x58/0x110 lib/kasprintf.c:49
    [<ffffffff822f402b>] kobject_set_name_vargs+0x3b/0xe0 lib/kobject.c:289
    [<ffffffff825ec413>] dev_set_name+0x63/0x90 drivers/base/core.c:3028
    [<ffffffff82ba6269>] usb_set_configuration+0x6b9/0xb90 drivers/usb/core/message.c:2099
    [<ffffffff82bb69ec>] usb_generic_driver_probe+0x8c/0xc0 drivers/usb/core/generic.c:238
    [<ffffffff82ba874c>] usb_probe_device+0x5c/0x140 drivers/usb/core/driver.c:293
    [<ffffffff825f67f9>] really_probe+0x159/0x4a0 drivers/base/dd.c:559
    [<ffffffff825f6bc4>] driver_probe_device+0x84/0x100 drivers/base/dd.c:745
    [<ffffffff825f72de>] __device_attach_driver+0xee/0x110 drivers/base/dd.c:851
    [<ffffffff825f3747>] bus_for_each_drv+0xb7/0x100 drivers/base/bus.c:431
    [<ffffffff825f6e72>] __device_attach+0x122/0x250 drivers/base/dd.c:919
    [<ffffffff825f53e6>] bus_probe_device+0xc6/0xe0 drivers/base/bus.c:491
    [<ffffffff825f1935>] device_add+0x5d5/0xc40 drivers/base/core.c:3242
    [<ffffffff841df2d9>] usb_new_device.cold+0x16a/0x582 drivers/usb/core/hub.c:2555
    [<ffffffff82b9b24e>] hub_port_connect drivers/usb/core/hub.c:5223 [inline]
    [<ffffffff82b9b24e>] hub_port_connect_change drivers/usb/core/hub.c:5363 [inline]
    [<ffffffff82b9b24e>] port_event drivers/usb/core/hub.c:5509 [inline]
    [<ffffffff82b9b24e>] hub_event+0x142e/0x20c0 drivers/usb/core/hub.c:5591

BUG: memory leak
unreferenced object 0xffff88810c472800 (size 256):
  comm "kworker/0:2", pid 3660, jiffies 4294952409 (age 24.660s)
  hex dump (first 32 bytes):
    00 00 00 00 00 00 00 00 08 28 47 0c 81 88 ff ff  .........(G.....
    08 28 47 0c 81 88 ff ff b0 c4 5e 82 ff ff ff ff  .(G.......^.....
  backtrace:
    [<ffffffff825f1b71>] kmalloc include/linux/slab.h:554 [inline]
    [<ffffffff825f1b71>] kzalloc include/linux/slab.h:684 [inline]
    [<ffffffff825f1b71>] device_private_init drivers/base/core.c:3084 [inline]
    [<ffffffff825f1b71>] device_add+0x811/0xc40 drivers/base/core.c:3134
    [<ffffffff82ba6589>] usb_set_configuration+0x9d9/0xb90 drivers/usb/core/message.c:2164
    [<ffffffff82bb69ec>] usb_generic_driver_probe+0x8c/0xc0 drivers/usb/core/generic.c:238
    [<ffffffff82ba874c>] usb_probe_device+0x5c/0x140 drivers/usb/core/driver.c:293
    [<ffffffff825f67f9>] really_probe+0x159/0x4a0 drivers/base/dd.c:559
    [<ffffffff825f6bc4>] driver_probe_device+0x84/0x100 drivers/base/dd.c:745
    [<ffffffff825f72de>] __device_attach_driver+0xee/0x110 drivers/base/dd.c:851
    [<ffffffff825f3747>] bus_for_each_drv+0xb7/0x100 drivers/base/bus.c:431
    [<ffffffff825f6e72>] __device_attach+0x122/0x250 drivers/base/dd.c:919
    [<ffffffff825f53e6>] bus_probe_device+0xc6/0xe0 drivers/base/bus.c:491
    [<ffffffff825f1935>] device_add+0x5d5/0xc40 drivers/base/core.c:3242
    [<ffffffff841df2d9>] usb_new_device.cold+0x16a/0x582 drivers/usb/core/hub.c:2555
    [<ffffffff82b9b24e>] hub_port_connect drivers/usb/core/hub.c:5223 [inline]
    [<ffffffff82b9b24e>] hub_port_connect_change drivers/usb/core/hub.c:5363 [inline]
    [<ffffffff82b9b24e>] port_event drivers/usb/core/hub.c:5509 [inline]
    [<ffffffff82b9b24e>] hub_event+0x142e/0x20c0 drivers/usb/core/hub.c:5591
    [<ffffffff81259619>] process_one_work+0x2c9/0x600 kernel/workqueue.c:2275
    [<ffffffff81259f09>] worker_thread+0x59/0x5d0 kernel/workqueue.c:2421
    [<ffffffff81261638>] kthread+0x178/0x1b0 kernel/kthread.c:292

[  176.


---
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