linux-kernel - memory leak in usb_set

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Date:   Wed, 11 Nov 2020 05:55:27 -0800
From:   syzbot <syzbot+641bd6ff9b25e6d3aad1@...kaller.appspotmail.com>
To:     andriy.shevchenko@...ux.intel.com, gregkh@...uxfoundation.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: memory leak in usb_set_configuration

Hello,

syzbot found the following issue on:

HEAD commit:    407ab579 Merge tag 'for-linus' of git://git.kernel.org/pub..
git tree:       upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=16d84062500000
kernel config:  https://syzkaller.appspot.com/x/.config?x=a3f13716fa0212fd
dashboard link: https://syzkaller.appspot.com/bug?extid=641bd6ff9b25e6d3aad1
compiler:       gcc (GCC) 10.1.0-syz 20200507
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=102c2094500000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=16a8dfa8500000

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+641bd6ff9b25e6d3aad1@...kaller.appspotmail.com

BUG: memory leak
unreferenced object 0xffff88810ed7cc00 (size 1024):
  comm "kworker/0:3", pid 4907, jiffies 4294954595 (age 14.630s)
  hex dump (first 32 bytes):
    48 92 b6 11 81 88 ff ff 48 92 b6 11 81 88 ff ff  H.......H.......
    01 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
  backtrace:
    [<00000000acb2212d>] kmalloc include/linux/slab.h:552 [inline]
    [<00000000acb2212d>] kzalloc include/linux/slab.h:664 [inline]
    [<00000000acb2212d>] usb_set_configuration+0x18c/0xb90 drivers/usb/core/message.c:1987
    [<00000000398ef244>] usb_generic_driver_probe+0x8c/0xc0 drivers/usb/core/generic.c:238
    [<00000000c8516fd1>] usb_probe_device+0x5c/0x140 drivers/usb/core/driver.c:293
    [<00000000eb555eca>] really_probe+0x159/0x480 drivers/base/dd.c:554
    [<0000000082b68944>] driver_probe_device+0x84/0x100 drivers/base/dd.c:738
    [<000000000485fb4d>] __device_attach_driver+0xee/0x110 drivers/base/dd.c:844
    [<00000000a0e84ad1>] bus_for_each_drv+0xb7/0x100 drivers/base/bus.c:431
    [<0000000017598cdd>] __device_attach+0x122/0x250 drivers/base/dd.c:912
    [<00000000201e5839>] bus_probe_device+0xc6/0xe0 drivers/base/bus.c:491
    [<00000000ec5f56bf>] device_add+0x5ac/0xc30 drivers/base/core.c:2936
    [<0000000049b5ad41>] usb_new_device.cold+0x166/0x578 drivers/usb/core/hub.c:2554
    [<0000000030bc00f0>] hub_port_connect drivers/usb/core/hub.c:5222 [inline]
    [<0000000030bc00f0>] hub_port_connect_change drivers/usb/core/hub.c:5362 [inline]
    [<0000000030bc00f0>] port_event drivers/usb/core/hub.c:5508 [inline]
    [<0000000030bc00f0>] hub_event+0x144a/0x20d0 drivers/usb/core/hub.c:5590
    [<00000000e89e69ae>] process_one_work+0x27d/0x590 kernel/workqueue.c:2272
    [<0000000063d76c23>] worker_thread+0x59/0x5d0 kernel/workqueue.c:2418
    [<00000000a311ec69>] kthread+0x178/0x1b0 kernel/kthread.c:292
    [<00000000690c42fe>] ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296

BUG: memory leak
unreferenced object 0xffff888110d0ab40 (size 32):
  comm "kworker/0:3", pid 4907, jiffies 4294954595 (age 14.630s)
  hex dump (first 32 bytes):
    31 2d 31 3a 30 2e 30 00 00 00 00 00 00 00 00 00  1-1:0.0.........
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
  backtrace:
    [<00000000faadb384>] kvasprintf+0x6c/0xf0 lib/kasprintf.c:25
    [<00000000ae06ab4d>] kvasprintf_const+0x58/0x110 lib/kasprintf.c:49
    [<0000000098542b5a>] kobject_set_name_vargs+0x3b/0xe0 lib/kobject.c:289
    [<00000000d0bb751d>] dev_set_name+0x63/0x90 drivers/base/core.c:2722
    [<00000000b7617caa>] usb_set_configuration+0x6be/0xb90 drivers/usb/core/message.c:2094
    [<00000000398ef244>] usb_generic_driver_probe+0x8c/0xc0 drivers/usb/core/generic.c:238
    [<00000000c8516fd1>] usb_probe_device+0x5c/0x140 drivers/usb/core/driver.c:293
    [<00000000eb555eca>] really_probe+0x159/0x480 drivers/base/dd.c:554
    [<0000000082b68944>] driver_probe_device+0x84/0x100 drivers/base/dd.c:738
    [<000000000485fb4d>] __device_attach_driver+0xee/0x110 drivers/base/dd.c:844
    [<00000000a0e84ad1>] bus_for_each_drv+0xb7/0x100 drivers/base/bus.c:431
    [<0000000017598cdd>] __device_attach+0x122/0x250 drivers/base/dd.c:912
    [<00000000201e5839>] bus_probe_device+0xc6/0xe0 drivers/base/bus.c:491
    [<00000000ec5f56bf>] device_add+0x5ac/0xc30 drivers/base/core.c:2936
    [<0000000049b5ad41>] usb_new_device.cold+0x166/0x578 drivers/usb/core/hub.c:2554
    [<0000000030bc00f0>] hub_port_connect drivers/usb/core/hub.c:5222 [inline]
    [<0000000030bc00f0>] hub_port_connect_change drivers/usb/core/hub.c:5362 [inline]
    [<0000000030bc00f0>] port_event drivers/usb/core/hub.c:5508 [inline]
    [<0000000030bc00f0>] hub_event+0x144a/0x20d0 drivers/usb/core/hub.c:5590

BUG: memory leak
unreferenced object 0xffff88811182b900 (size 256):
  comm "kworker/0:3", pid 4907, jiffies 4294954600 (age 14.580s)
  hex dump (first 32 bytes):
    00 00 00 00 00 00 00 00 08 b9 82 11 81 88 ff ff  ................
    08 b9 82 11 81 88 ff ff 40 44 58 82 ff ff ff ff  ........@.......
  backtrace:
    [<000000000b81baae>] kmalloc include/linux/slab.h:552 [inline]
    [<000000000b81baae>] kzalloc include/linux/slab.h:664 [inline]
    [<000000000b81baae>] device_private_init drivers/base/core.c:2778 [inline]
    [<000000000b81baae>] device_add+0x7e8/0xc30 drivers/base/core.c:2828
    [<000000002061ca5e>] usb_set_configuration+0x9de/0xb90 drivers/usb/core/message.c:2159
    [<00000000398ef244>] usb_generic_driver_probe+0x8c/0xc0 drivers/usb/core/generic.c:238
    [<00000000c8516fd1>] usb_probe_device+0x5c/0x140 drivers/usb/core/driver.c:293
    [<00000000eb555eca>] really_probe+0x159/0x480 drivers/base/dd.c:554
    [<0000000082b68944>] driver_probe_device+0x84/0x100 drivers/base/dd.c:738
    [<000000000485fb4d>] __device_attach_driver+0xee/0x110 drivers/base/dd.c:844
    [<00000000a0e84ad1>] bus_for_each_drv+0xb7/0x100 drivers/base/bus.c:431
    [<0000000017598cdd>] __device_attach+0x122/0x250 drivers/base/dd.c:912
    [<00000000201e5839>] bus_probe_device+0xc6/0xe0 drivers/base/bus.c:491
    [<00000000ec5f56bf>] device_add+0x5ac/0xc30 drivers/base/core.c:2936
    [<0000000049b5ad41>] usb_new_device.cold+0x166/0x578 drivers/usb/core/hub.c:2554
    [<0000000030bc00f0>] hub_port_connect drivers/usb/core/hub.c:5222 [inline]
    [<0000000030bc00f0>] hub_port_connect_change drivers/usb/core/hub.c:5362 [inline]
    [<0000000030bc00f0>] port_event drivers/usb/core/hub.c:5508 [inline]
    [<0000000030bc00f0>] hub_event+0x144a/0x20d0 drivers/usb/core/hub.c:5590
    [<00000000e89e69ae>] process_one_work+0x27d/0x590 kernel/workqueue.c:2272
    [<0000000063d76c23>] worker_thread+0x59/0x5d0 kernel/workqueue.c:2418
    [<00000000a311ec69>] kthread+0x178/0x1b0 kernel/kthread.c:292



---
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