memory leak in pcan_usb_pro

memory leak in pcan_usb_pro_init
Status: upstream: reported C repro on 2020/12/08 22:33
Reported-by: syzbot+215ecdbae76bb8c36b7e@syzkaller.appspotmail.com
First crash: 51d, last: 22d

Sample crash report:

BUG: memory leak
unreferenced object 0xffff888110e76300 (size 96):
  comm "kworker/1:1", pid 56, jiffies 4294942680 (age 8.850s)
  hex dump (first 32 bytes):
    00 09 17 13 81 88 ff ff 00 00 00 00 00 00 00 00  ................
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
  backtrace:
    [<0000000081f5bef8>] kmalloc include/linux/slab.h:552 [inline]
    [<0000000081f5bef8>] kzalloc include/linux/slab.h:682 [inline]
    [<0000000081f5bef8>] pcan_usb_pro_init+0x120/0x280 drivers/net/can/usb/peak_usb/pcan_usb_pro.c:856
    [<00000000f52fc8d6>] peak_usb_create_dev drivers/net/can/usb/peak_usb/pcan_usb_core.c:851 [inline]
    [<00000000f52fc8d6>] peak_usb_probe+0x389/0x490 drivers/net/can/usb/peak_usb/pcan_usb_core.c:949
    [<00000000a097c4f8>] usb_probe_interface+0x177/0x370 drivers/usb/core/driver.c:396
    [<0000000015078d9a>] really_probe+0x159/0x480 drivers/base/dd.c:561
    [<00000000db0dcf9c>] driver_probe_device+0x84/0x100 drivers/base/dd.c:745
    [<00000000d43d108b>] __device_attach_driver+0xee/0x110 drivers/base/dd.c:851
    [<000000002ba37505>] bus_for_each_drv+0xb7/0x100 drivers/base/bus.c:431
    [<00000000b5f90ff4>] __device_attach+0x122/0x250 drivers/base/dd.c:919
    [<00000000fa6b70f5>] bus_probe_device+0xc6/0xe0 drivers/base/bus.c:491
    [<000000004486b8b9>] device_add+0x5be/0xc30 drivers/base/core.c:3091
    [<000000004bb8d840>] usb_set_configuration+0x9d9/0xb90 drivers/usb/core/message.c:2164
    [<000000000e3165e8>] usb_generic_driver_probe+0x8c/0xc0 drivers/usb/core/generic.c:238
    [<0000000019c74261>] usb_probe_device+0x5c/0x140 drivers/usb/core/driver.c:293
    [<0000000015078d9a>] really_probe+0x159/0x480 drivers/base/dd.c:561
    [<00000000db0dcf9c>] driver_probe_device+0x84/0x100 drivers/base/dd.c:745
    [<00000000d43d108b>] __device_attach_driver+0xee/0x110 drivers/base/dd.c:851

Crashes (6):
Manager	Time	Kernel	Commit	Syzkaller	Config	Log	Report	Syz repro	C repro	Maintainers
ci-upstream-gce-leak	2021/01/03 04:37	upstream	3516bd72	79264ae3	.config	log	report	syz	C	davem@davemloft.net, gustavoars@kernel.org, kuba@kernel.org, linux-can@vger.kernel.org, linux-kernel@vger.kernel.org, liushixin2@huawei.com, mkl@pengutronix.de, netdev@vger.kernel.org, socketcan@hartkopp.net, wg@grandegger.com
ci-upstream-gce-leak	2020/12/29 19:22	upstream	dea8dcf2	80910769	.config	log	report	syz	C	davem@davemloft.net, gustavoars@kernel.org, kuba@kernel.org, linux-can@vger.kernel.org, linux-kernel@vger.kernel.org, liushixin2@huawei.com, mkl@pengutronix.de, netdev@vger.kernel.org, socketcan@hartkopp.net, wg@grandegger.com
ci-upstream-gce-leak	2020/12/16 10:49	upstream	d635a69d	f213e07e	.config	log	report	syz	C	davem@davemloft.net, gustavoars@kernel.org, kuba@kernel.org, linux-can@vger.kernel.org, linux-kernel@vger.kernel.org, liushixin2@huawei.com, mkl@pengutronix.de, netdev@vger.kernel.org, socketcan@hartkopp.net, wg@grandegger.com
ci-upstream-gce-leak	2020/12/15 19:58	upstream	148842c9	97183ed7	.config	log	report	syz	C	davem@davemloft.net, gustavoars@kernel.org, kuba@kernel.org, linux-can@vger.kernel.org, linux-kernel@vger.kernel.org, liushixin2@huawei.com, mkl@pengutronix.de, netdev@vger.kernel.org, wg@grandegger.com
ci-upstream-gce-leak	2020/12/07 18:13	upstream	0477e928	1190297f	.config	log	report	syz	C	davem@davemloft.net, gustavoars@kernel.org, kuba@kernel.org, linux-can@vger.kernel.org, linux-kernel@vger.kernel.org, liushixin2@huawei.com, mkl@pengutronix.de, netdev@vger.kernel.org, wg@grandegger.com
ci-upstream-gce-leak	2020/12/04 22:27	upstream	e87297fa	20366b87	.config	log	report	syz	C	davem@davemloft.net, gustavoars@kernel.org, kuba@kernel.org, linux-can@vger.kernel.org, linux-kernel@vger.kernel.org, liushixin2@huawei.com, mkl@pengutronix.de, netdev@vger.kernel.org, wg@grandegger.com