linux-kernel - memory leak in usb_urb

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Message-ID: <0000000000009d50ae05b81e4091@google.com>
Date:   Mon, 04 Jan 2021 18:49:16 -0800
From:   syzbot <syzbot+3c2be7424cea3b932b0e@...kaller.appspotmail.com>
To:     linux-kernel@...r.kernel.org, linux-media@...r.kernel.org,
        mchehab@...nel.org, syzkaller-bugs@...glegroups.com
Subject: memory leak in usb_urb_init

Hello,

syzbot found the following issue on:

HEAD commit:    f6e1ea19 Merge tag 'ceph-for-5.11-rc2' of git://github.com..
git tree:       upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=102e814f500000
kernel config:  https://syzkaller.appspot.com/x/.config?x=1dcbf163b62a8256
dashboard link: https://syzkaller.appspot.com/bug?extid=3c2be7424cea3b932b0e
compiler:       gcc (GCC) 10.1.0-syz 20200507
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=1509c9c0d00000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=12e15e0b500000

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+3c2be7424cea3b932b0e@...kaller.appspotmail.com

BUG: memory leak
unreferenced object 0xffff888114a12180 (size 192):
  comm "kworker/1:3", pid 8132, jiffies 4294980969 (age 13.460s)
  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 98 21 a1 14 81 88 ff ff  .........!......
  backtrace:
    [<00000000270adc89>] kmalloc include/linux/slab.h:557 [inline]
    [<00000000270adc89>] usb_alloc_urb+0x66/0xe0 drivers/usb/core/urb.c:74
    [<000000007ddd474e>] usb_bulk_urb_init drivers/media/usb/dvb-usb/usb-urb.c:148 [inline]
    [<000000007ddd474e>] usb_urb_init+0x17a/0x3d0 drivers/media/usb/dvb-usb/usb-urb.c:229
    [<00000000bdcce353>] dvb_usb_adapter_stream_init+0x5b/0x120 drivers/media/usb/dvb-usb/dvb-usb-urb.c:108
    [<00000000adc3ae74>] dvb_usb_adapter_init drivers/media/usb/dvb-usb/dvb-usb-init.c:82 [inline]
    [<00000000adc3ae74>] dvb_usb_init drivers/media/usb/dvb-usb/dvb-usb-init.c:173 [inline]
    [<00000000adc3ae74>] dvb_usb_device_init.cold+0x483/0x6ae drivers/media/usb/dvb-usb/dvb-usb-init.c:287
    [<00000000979fb93a>] m920x_probe+0x1d7/0x470 drivers/media/usb/dvb-usb/m920x.c:834
    [<00000000dc58d155>] usb_probe_interface+0x177/0x370 drivers/usb/core/driver.c:396
    [<0000000011b900cd>] really_probe+0x159/0x480 drivers/base/dd.c:561
    [<000000003bf38880>] driver_probe_device+0x84/0x100 drivers/base/dd.c:745
    [<000000003450ad28>] __device_attach_driver+0xee/0x110 drivers/base/dd.c:851
    [<000000005a93a91d>] bus_for_each_drv+0xb7/0x100 drivers/base/bus.c:431
    [<0000000058084795>] __device_attach+0x122/0x250 drivers/base/dd.c:919
    [<00000000e0d09782>] bus_probe_device+0xc6/0xe0 drivers/base/bus.c:491
    [<000000004566d8b7>] device_add+0x5be/0xc30 drivers/base/core.c:3091
    [<000000000471371f>] usb_set_configuration+0x9d9/0xb90 drivers/usb/core/message.c:2164
    [<00000000d93dc50f>] usb_generic_driver_probe+0x8c/0xc0 drivers/usb/core/generic.c:238
    [<00000000a0057c67>] usb_probe_device+0x5c/0x140 drivers/usb/core/driver.c:293

BUG: memory leak
unreferenced object 0xffff888114a126c0 (size 192):
  comm "kworker/1:3", pid 8132, jiffies 4294980969 (age 13.460s)
  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 d8 26 a1 14 81 88 ff ff  .........&......
  backtrace:
    [<00000000270adc89>] kmalloc include/linux/slab.h:557 [inline]
    [<00000000270adc89>] usb_alloc_urb+0x66/0xe0 drivers/usb/core/urb.c:74
    [<000000007ddd474e>] usb_bulk_urb_init drivers/media/usb/dvb-usb/usb-urb.c:148 [inline]
    [<000000007ddd474e>] usb_urb_init+0x17a/0x3d0 drivers/media/usb/dvb-usb/usb-urb.c:229
    [<00000000bdcce353>] dvb_usb_adapter_stream_init+0x5b/0x120 drivers/media/usb/dvb-usb/dvb-usb-urb.c:108
    [<00000000adc3ae74>] dvb_usb_adapter_init drivers/media/usb/dvb-usb/dvb-usb-init.c:82 [inline]
    [<00000000adc3ae74>] dvb_usb_init drivers/media/usb/dvb-usb/dvb-usb-init.c:173 [inline]
    [<00000000adc3ae74>] dvb_usb_device_init.cold+0x483/0x6ae drivers/media/usb/dvb-usb/dvb-usb-init.c:287
    [<00000000979fb93a>] m920x_probe+0x1d7/0x470 drivers/media/usb/dvb-usb/m920x.c:834
    [<00000000dc58d155>] usb_probe_interface+0x177/0x370 drivers/usb/core/driver.c:396
    [<0000000011b900cd>] really_probe+0x159/0x480 drivers/base/dd.c:561
    [<000000003bf38880>] driver_probe_device+0x84/0x100 drivers/base/dd.c:745
    [<000000003450ad28>] __device_attach_driver+0xee/0x110 drivers/base/dd.c:851
    [<000000005a93a91d>] bus_for_each_drv+0xb7/0x100 drivers/base/bus.c:431
    [<0000000058084795>] __device_attach+0x122/0x250 drivers/base/dd.c:919
    [<00000000e0d09782>] bus_probe_device+0xc6/0xe0 drivers/base/bus.c:491
    [<000000004566d8b7>] device_add+0x5be/0xc30 drivers/base/core.c:3091
    [<000000000471371f>] usb_set_configuration+0x9d9/0xb90 drivers/usb/core/message.c:2164
    [<00000000d93dc50f>] usb_generic_driver_probe+0x8c/0xc0 drivers/usb/core/generic.c:238
    [<00000000a0057c67>] usb_probe_device+0x5c/0x140 drivers/usb/core/driver.c:293

BUG: memory leak
unreferenced object 0xffff888114bbf900 (size 192):
  comm "kworker/1:3", pid 8132, jiffies 4294980969 (age 13.460s)
  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 f9 bb 14 81 88 ff ff  ................
  backtrace:
    [<00000000270adc89>] kmalloc include/linux/slab.h:557 [inline]
    [<00000000270adc89>] usb_alloc_urb+0x66/0xe0 drivers/usb/core/urb.c:74
    [<000000007ddd474e>] usb_bulk_urb_init drivers/media/usb/dvb-usb/usb-urb.c:148 [inline]
    [<000000007ddd474e>] usb_urb_init+0x17a/0x3d0 drivers/media/usb/dvb-usb/usb-urb.c:229
    [<00000000bdcce353>] dvb_usb_adapter_stream_init+0x5b/0x120 drivers/media/usb/dvb-usb/dvb-usb-urb.c:108
    [<00000000adc3ae74>] dvb_usb_adapter_init drivers/media/usb/dvb-usb/dvb-usb-init.c:82 [inline]
    [<00000000adc3ae74>] dvb_usb_init drivers/media/usb/dvb-usb/dvb-usb-init.c:173 [inline]
    [<00000000adc3ae74>] dvb_usb_device_init.cold+0x483/0x6ae drivers/media/usb/dvb-usb/dvb-usb-init.c:287
    [<00000000979fb93a>] m920x_probe+0x1d7/0x470 drivers/media/usb/dvb-usb/m920x.c:834
    [<00000000dc58d155>] usb_probe_interface+0x177/0x370 drivers/usb/core/driver.c:396
    [<0000000011b900cd>] really_probe+0x159/0x480 drivers/base/dd.c:561
    [<000000003bf38880>] driver_probe_device+0x84/0x100 drivers/base/dd.c:745
    [<000000003450ad28>] __device_attach_driver+0xee/0x110 drivers/base/dd.c:851
    [<000000005a93a91d>] bus_for_each_drv+0xb7/0x100 drivers/base/bus.c:431
    [<0000000058084795>] __device_attach+0x122/0x250 drivers/base/dd.c:919
    [<00000000e0d09782>] bus_probe_device+0xc6/0xe0 drivers/base/bus.c:491
    [<000000004566d8b7>] device_add+0x5be/0xc30 drivers/base/core.c:3091
    [<000000000471371f>] usb_set_configuration+0x9d9/0xb90 drivers/usb/core/message.c:2164
    [<00000000d93dc50f>] usb_generic_driver_probe+0x8c/0xc0 drivers/usb/core/generic.c:238
    [<00000000a0057c67>] usb_probe_device+0x5c/0x140 drivers/usb/core/driver.c:293



---
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