linux-kernel - memory leak in atusb

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Date:   Fri, 13 Nov 2020 09:17:32 -0800
From:   syzbot <syzbot+28a246747e0a465127f3@...kaller.appspotmail.com>
To:     eli.billauer@...il.com, gregkh@...uxfoundation.org,
        gustavoars@...nel.org, ingrassia@...genesys.com,
        linux-kernel@...r.kernel.org, linux-usb@...r.kernel.org,
        oneukum@...e.com, stern@...land.harvard.edu,
        syzkaller-bugs@...glegroups.com, tiwai@...e.de
Subject: memory leak in atusb_probe

Hello,

syzbot found the following issue on:

HEAD commit:    af5043c8 Merge tag 'acpi-5.10-rc4' of git://git.kernel.org..
git tree:       upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=10f165e6500000
kernel config:  https://syzkaller.appspot.com/x/.config?x=a3f13716fa0212fd
dashboard link: https://syzkaller.appspot.com/bug?extid=28a246747e0a465127f3
compiler:       gcc (GCC) 10.1.0-syz 20200507
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=155d8dba500000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=153b46a1500000

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+28a246747e0a465127f3@...kaller.appspotmail.com

BUG: memory leak
unreferenced object 0xffff888109e0af00 (size 192):
  comm "kworker/1:2", pid 3205, jiffies 4294942324 (age 8.180s)
  hex dump (first 32 bytes):
    01 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
    00 00 00 00 00 00 00 00 18 af e0 09 81 88 ff ff  ................
  backtrace:
    [<0000000070ad19b0>] kmalloc include/linux/slab.h:557 [inline]
    [<0000000070ad19b0>] usb_alloc_urb+0x66/0xe0 drivers/usb/core/urb.c:74
    [<000000008781be0e>] atusb_alloc_urbs drivers/net/ieee802154/atusb.c:362 [inline]
    [<000000008781be0e>] atusb_probe+0x158/0x820 drivers/net/ieee802154/atusb.c:1038
    [<00000000cce0cf01>] usb_probe_interface+0x177/0x370 drivers/usb/core/driver.c:396
    [<0000000020e0d57d>] really_probe+0x159/0x480 drivers/base/dd.c:554
    [<00000000e105c1d7>] driver_probe_device+0x84/0x100 drivers/base/dd.c:738
    [<0000000027607927>] __device_attach_driver+0xee/0x110 drivers/base/dd.c:844
    [<000000003813d62a>] bus_for_each_drv+0xb7/0x100 drivers/base/bus.c:431
    [<00000000e9e76ec4>] __device_attach+0x122/0x250 drivers/base/dd.c:912
    [<00000000db4b9c2e>] bus_probe_device+0xc6/0xe0 drivers/base/bus.c:491
    [<0000000004dae719>] device_add+0x5ac/0xc30 drivers/base/core.c:2936
    [<000000002e126243>] usb_set_configuration+0x9de/0xb90 drivers/usb/core/message.c:2159
    [<0000000076889926>] usb_generic_driver_probe+0x8c/0xc0 drivers/usb/core/generic.c:238
    [<000000004ff8d735>] usb_probe_device+0x5c/0x140 drivers/usb/core/driver.c:293
    [<0000000020e0d57d>] really_probe+0x159/0x480 drivers/base/dd.c:554
    [<00000000e105c1d7>] driver_probe_device+0x84/0x100 drivers/base/dd.c:738
    [<0000000027607927>] __device_attach_driver+0xee/0x110 drivers/base/dd.c:844

BUG: memory leak
unreferenced object 0xffff888109e0a300 (size 192):
  comm "kworker/1:2", pid 3205, jiffies 4294942324 (age 8.180s)
  hex dump (first 32 bytes):
    01 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
    00 00 00 00 00 00 00 00 18 a3 e0 09 81 88 ff ff  ................
  backtrace:
    [<0000000070ad19b0>] kmalloc include/linux/slab.h:557 [inline]
    [<0000000070ad19b0>] usb_alloc_urb+0x66/0xe0 drivers/usb/core/urb.c:74
    [<000000008781be0e>] atusb_alloc_urbs drivers/net/ieee802154/atusb.c:362 [inline]
    [<000000008781be0e>] atusb_probe+0x158/0x820 drivers/net/ieee802154/atusb.c:1038
    [<00000000cce0cf01>] usb_probe_interface+0x177/0x370 drivers/usb/core/driver.c:396
    [<0000000020e0d57d>] really_probe+0x159/0x480 drivers/base/dd.c:554
    [<00000000e105c1d7>] driver_probe_device+0x84/0x100 drivers/base/dd.c:738
    [<0000000027607927>] __device_attach_driver+0xee/0x110 drivers/base/dd.c:844
    [<000000003813d62a>] bus_for_each_drv+0xb7/0x100 drivers/base/bus.c:431
    [<00000000e9e76ec4>] __device_attach+0x122/0x250 drivers/base/dd.c:912
    [<00000000db4b9c2e>] bus_probe_device+0xc6/0xe0 drivers/base/bus.c:491
    [<0000000004dae719>] device_add+0x5ac/0xc30 drivers/base/core.c:2936
    [<000000002e126243>] usb_set_configuration+0x9de/0xb90 drivers/usb/core/message.c:2159
    [<0000000076889926>] usb_generic_driver_probe+0x8c/0xc0 drivers/usb/core/generic.c:238
    [<000000004ff8d735>] usb_probe_device+0x5c/0x140 drivers/usb/core/driver.c:293
    [<0000000020e0d57d>] really_probe+0x159/0x480 drivers/base/dd.c:554
    [<00000000e105c1d7>] driver_probe_device+0x84/0x100 drivers/base/dd.c:738
    [<0000000027607927>] __device_attach_driver+0xee/0x110 drivers/base/dd.c:844



---
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