memory leak in dvb_create_media

memory leak in dvb_create_media_graph
Status: upstream: reported C repro on 2020/11/11 13:55
Reported-by: syzbot+7f09440acc069a0d38ac@syzkaller.appspotmail.com
First crash: 70d, last: 8d01h

Patch testing requests:
Created	Duration	User	Patch	Repo	Result
2020/12/10 17:29	14m	yepeilin.cs@gmail.com	patch	upstream	report log

Sample crash report:

BUG: memory leak
unreferenced object 0xffff88810af94e80 (size 128):
  comm "kworker/0:2", pid 3634, jiffies 4294942340 (age 13.270s)
  hex dump (first 32 bytes):
    00 00 00 00 00 00 00 00 06 05 00 00 00 00 00 00  ................
    00 01 00 00 00 00 ad de 22 01 00 00 00 00 ad de  ........".......
  backtrace:
    [<000000005cd0b995>] kmalloc include/linux/slab.h:552 [inline]
    [<000000005cd0b995>] kzalloc include/linux/slab.h:682 [inline]
    [<000000005cd0b995>] dvb_create_media_graph+0x301/0x7d0 drivers/media/dvb-core/dvbdev.c:665
    [<0000000053a50072>] dvb_usb_adapter_frontend_init+0x180/0x1b0 drivers/media/usb/dvb-usb/dvb-usb-dvb.c:327
    [<000000007bcb84f3>] dvb_usb_adapter_init drivers/media/usb/dvb-usb/dvb-usb-init.c:84 [inline]
    [<000000007bcb84f3>] dvb_usb_init drivers/media/usb/dvb-usb/dvb-usb-init.c:173 [inline]
    [<000000007bcb84f3>] dvb_usb_device_init.cold+0x4d0/0x6ae drivers/media/usb/dvb-usb/dvb-usb-init.c:287
    [<00000000760a2416>] gp8psk_usb_probe+0x2a/0x50 drivers/media/usb/dvb-usb/gp8psk.c:304
    [<00000000d01ae746>] usb_probe_interface+0x177/0x370 drivers/usb/core/driver.c:396
    [<0000000032f56ac5>] really_probe+0x159/0x480 drivers/base/dd.c:561
    [<00000000e8f667df>] driver_probe_device+0x84/0x100 drivers/base/dd.c:745
    [<000000004547bbc6>] __device_attach_driver+0xee/0x110 drivers/base/dd.c:851
    [<000000006847cca6>] bus_for_each_drv+0xb7/0x100 drivers/base/bus.c:431
    [<00000000fa92675f>] __device_attach+0x122/0x250 drivers/base/dd.c:919
    [<0000000015714cc2>] bus_probe_device+0xc6/0xe0 drivers/base/bus.c:491
    [<0000000037021899>] device_add+0x5be/0xc30 drivers/base/core.c:3091
    [<0000000027b01dc5>] usb_set_configuration+0x9d9/0xb90 drivers/usb/core/message.c:2164
    [<000000006887a145>] usb_generic_driver_probe+0x8c/0xc0 drivers/usb/core/generic.c:238
    [<00000000bb659468>] usb_probe_device+0x5c/0x140 drivers/usb/core/driver.c:293
    [<0000000032f56ac5>] really_probe+0x159/0x480 drivers/base/dd.c:561

Crashes (13):
Manager	Time	Kernel	Commit	Syzkaller	Config	Log	Report	Syz repro	C repro	Maintainers
ci-upstream-gce-leak	2021/01/11 11:32	upstream	0653161f	2c1f2513	.config	log	report	syz	C	brad@nextdimension.cc, dinghao.liu@zju.edu.cn, laurent.pinchart@ideasonboard.com, linux-kernel@vger.kernel.org, linux-media@vger.kernel.org, mchehab@kernel.org, sean@mess.org
ci-upstream-gce-leak	2021/01/07 13:36	upstream	71c061d2	c104d4a3	.config	log	report	syz	C	brad@nextdimension.cc, dinghao.liu@zju.edu.cn, linux-kernel@vger.kernel.org, linux-media@vger.kernel.org, mchehab@kernel.org, sean@mess.org, wsa+renesas@sang-engineering.com
ci-upstream-gce-leak	2021/01/05 20:32	upstream	36bbbd0e	a0234d98	.config	log	report	syz	C	brad@nextdimension.cc, dinghao.liu@zju.edu.cn, linux-kernel@vger.kernel.org, linux-media@vger.kernel.org, mchehab@kernel.org, sean@mess.org, wsa+renesas@sang-engineering.com
ci-upstream-gce-leak	2020/12/21 19:14	upstream	e37b12e4	04201c06	.config	log	report	syz	C	brad@nextdimension.cc, dinghao.liu@zju.edu.cn, laurent.pinchart@ideasonboard.com, linux-kernel@vger.kernel.org, linux-media@vger.kernel.org, mchehab@kernel.org, sean@mess.org, wsa+renesas@sang-engineering.com
ci-upstream-gce-leak	2020/12/20 18:22	upstream	467f8165	04201c06	.config	log	report	syz	C	brad@nextdimension.cc, dinghao.liu@zju.edu.cn, laurent.pinchart@ideasonboard.com, linux-kernel@vger.kernel.org, linux-media@vger.kernel.org, mchehab@kernel.org, sean@mess.org, wsa+renesas@sang-engineering.com
ci-upstream-gce-leak	2020/12/19 18:56	upstream	3644e2d2	04201c06	.config	log	report	syz	C	brad@nextdimension.cc, dinghao.liu@zju.edu.cn, laurent.pinchart@ideasonboard.com, linux-kernel@vger.kernel.org, linux-media@vger.kernel.org, mchehab@kernel.org, sean@mess.org, wsa+renesas@sang-engineering.com
ci-upstream-gce-leak	2020/12/19 18:34	upstream	3644e2d2	04201c06	.config	log	report	syz	C	brad@nextdimension.cc, dinghao.liu@zju.edu.cn, laurent.pinchart@ideasonboard.com, linux-kernel@vger.kernel.org, linux-media@vger.kernel.org, mchehab@kernel.org, sean@mess.org, wsa+renesas@sang-engineering.com
ci-upstream-gce-leak	2020/11/27 00:58	upstream	4df91062	1d2b823e	.config	log	report	syz	C	brad@nextdimension.cc, laurent.pinchart@ideasonboard.com, linux-kernel@vger.kernel.org, linux-media@vger.kernel.org, mchehab@kernel.org, sean@mess.org, wsa+renesas@sang-engineering.com
ci-upstream-gce-leak	2020/11/25 01:40	upstream	80145ac2	e34b696c	.config	log	report	syz	C	brad@nextdimension.cc, laurent.pinchart@ideasonboard.com, linux-kernel@vger.kernel.org, linux-media@vger.kernel.org, mchehab@kernel.org, sean@mess.org, wsa+renesas@sang-engineering.com
ci-upstream-gce-leak	2020/11/15 23:17	upstream	0062442e	1bf9a662	.config	log	report	syz	C	brad@nextdimension.cc, laurent.pinchart@ideasonboard.com, linux-kernel@vger.kernel.org, linux-media@vger.kernel.org, mchehab@kernel.org, sean@mess.org, wsa+renesas@sang-engineering.com
ci-upstream-gce-leak	2020/11/10 11:55	upstream	407ab579	cca87986	.config	log	report	syz	C	brad@nextdimension.cc, laurent.pinchart@ideasonboard.com, linux-kernel@vger.kernel.org, linux-media@vger.kernel.org, mchehab@kernel.org, sean@mess.org, wsa+renesas@sang-engineering.com
ci-upstream-gce-leak	2020/11/09 14:23	upstream	f8394f23	64069d48	.config	log	report	syz	C	brad@nextdimension.cc, laurent.pinchart@ideasonboard.com, linux-kernel@vger.kernel.org, linux-media@vger.kernel.org, mchehab@kernel.org, sean@mess.org, wsa+renesas@sang-engineering.com
ci-upstream-gce-leak	2020/11/09 14:01	upstream	f8394f23	64069d48	.config	log	report	syz	C	brad@nextdimension.cc, laurent.pinchart@ideasonboard.com, linux-kernel@vger.kernel.org, linux-media@vger.kernel.org, mchehab@kernel.org, sean@mess.org, wsa+renesas@sang-engineering.com