redonkable/alistair23-linux
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alistair23-linux/drivers/media/tuners
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Takashi Iwai 22a1e7783e xc2028: Fix use-after-free bug properly 
The commit 8dfbcc4351 ("[media] xc2028: avoid use after free") tried
to address the reported use-after-free by clearing the reference.

However, it's clearing the wrong pointer; it sets NULL to
priv->ctrl.fname, but it's anyway overwritten by the next line
memcpy(&priv->ctrl, p, sizeof(priv->ctrl)).

OTOH, the actual code accessing the freed string is the strcmp() call
with priv->fname:
	if (!firmware_name[0] && p->fname &&
	    priv->fname && strcmp(p->fname, priv->fname))
		free_firmware(priv);

where priv->fname points to the previous file name, and this was
already freed by kfree().

For fixing the bug properly, this patch does the following:

- Keep the copy of firmware file name in only priv->fname,
  priv->ctrl.fname isn't changed;
- The allocation is done only when the firmware gets loaded;
- The kfree() is called in free_firmware() commonly

Fixes: commit 8dfbcc4351 ('[media] xc2028: avoid use after free')
Cc: <stable@vger.kernel.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
2016-11-23 21:04:26 -02:00
..
e4000.c [media] tuners: Drop owner assignment from i2c_driver 2015-08-11 13:01:32 -03:00
e4000.h [media] e4000: various small changes 2015-05-20 13:48:31 -03:00
e4000_priv.h [media] e4000: implement V4L2 subdevice tuner and core ops 2015-05-20 13:49:27 -03:00
fc001x-common.h
fc0011.c Revert "[media] fc0011: Return early, if the frequency is already tuned" 2013-02-11 19:38:59 -02:00
fc0011.h treewide: remove redundant #include <linux/kconfig.h> 2016-10-11 15:06:33 -07:00
fc0012-priv.h [media] fc0012: use Kernel dev_foo() logging 2013-01-06 09:08:23 -02:00
fc0012.c [media] fc001[23]: Change variable type to bool 2013-10-02 06:48:14 -03:00
fc0012.h treewide: remove redundant #include <linux/kconfig.h> 2016-10-11 15:06:33 -07:00
fc0013-priv.h
fc0013.c [media] fc0013: remove unneeded test 2015-05-14 18:06:40 -03:00
fc0013.h treewide: remove redundant #include <linux/kconfig.h> 2016-10-11 15:06:33 -07:00
fc2580.c [media] tuners: Drop owner assignment from i2c_driver 2015-08-11 13:01:32 -03:00
fc2580.h [media] fc2580: implement V4L2 subdevice for SDR control 2015-05-18 15:58:10 -03:00
fc2580_priv.h [media] fc2580: implement V4L2 subdevice for SDR control 2015-05-18 15:58:10 -03:00
it913x.c [media] it913x: do not allow driver unbind 2016-07-08 17:01:23 -03:00
it913x.h [media] it913x: re-implement sleep 2014-09-21 18:24:32 -03:00
Kconfig [media] tuners: Make all TV tuners visible if COMPILE_TEST=y 2015-08-11 12:56:40 -03:00
m88rs6000t.c [media] tuners: Refactoring for m88rs6000t_sleep() 2016-01-25 15:15:38 -02:00
m88rs6000t.h [media] m88rs6000t: add new dvb-s/s2 tuner for integrated chip M88RS6000 2014-11-03 18:23:43 -02:00
Makefile [media] m88ts2022: remove from Makefile 2015-04-07 08:12:06 -03:00
max2165.c [media] tv tuner max2165 driver: extend frequency range 2015-11-19 11:19:42 -02:00
max2165.h treewide: remove redundant #include <linux/kconfig.h> 2016-10-11 15:06:33 -07:00
max2165_priv.h
mc44s803.c [media] mc44s803: implement get_if_frequency() 2012-09-18 12:54:44 -03:00
mc44s803.h treewide: remove redundant #include <linux/kconfig.h> 2016-10-11 15:06:33 -07:00
mc44s803_priv.h
msi001.c spi: Drop owner assignment from spi_drivers 2015-10-28 10:30:17 +09:00
mt20xx.c [media] tuners: constify dvb_tuner_ops structures 2016-09-19 16:23:21 -03:00
mt20xx.h [media] Add and use IS_REACHABLE macro 2015-04-08 15:02:07 -03:00
mt2060.c [media] mt2060: just return 0 instead of using a var 2014-09-03 17:59:56 -03:00
mt2060.h [media] Add and use IS_REACHABLE macro 2015-04-08 15:02:07 -03:00
mt2060_priv.h
mt2063.c [media] tuners: constify dvb_tuner_ops structures 2016-09-19 16:23:21 -03:00
mt2063.h [media] Add and use IS_REACHABLE macro 2015-04-08 15:02:07 -03:00
mt2131.c [media] media: remove emacs editor variables 2014-12-22 17:52:20 -02:00
mt2131.h [media] Add and use IS_REACHABLE macro 2015-04-08 15:02:07 -03:00
mt2131_priv.h [media] media: remove emacs editor variables 2014-12-22 17:52:20 -02:00
mt2266.c
mt2266.h [media] Add and use IS_REACHABLE macro 2015-04-08 15:02:07 -03:00
mxl301rf.c [media] mxl301rf: add driver for MaxLinear MxL301RF OFDM tuner 2014-09-23 17:03:59 -03:00
mxl301rf.h [media] mxl301rf: add driver for MaxLinear MxL301RF OFDM tuner 2014-09-23 17:03:59 -03:00
mxl5005s.c [media] mxl5005s: just return 0 instead of using a var 2014-09-03 17:59:56 -03:00
mxl5005s.h treewide: remove redundant #include <linux/kconfig.h> 2016-10-11 15:06:33 -07:00
mxl5007t.c [media] tuners: constify dvb_tuner_ops structures 2016-09-19 16:23:21 -03:00
mxl5007t.h [media] Add and use IS_REACHABLE macro 2015-04-08 15:02:07 -03:00
qm1d1c0042.c [media] em28xx: add support for PLEX PX-BCUD (ISDB-S) 2016-05-06 23:51:47 -03:00
qm1d1c0042.h [media] qm1d1c0042: add driver for Sharp QM1D1C0042 ISDB-S tuner 2014-09-23 17:04:00 -03:00
qt1010.c [media] qt1010: avoid going past array 2015-04-30 14:57:35 -03:00
qt1010.h [media] Add and use IS_REACHABLE macro 2015-04-08 15:02:07 -03:00
qt1010_priv.h
r820t.c r820t: comment out two ancillary tables 2016-06-24 12:00:02 -03:00
r820t.h treewide: remove redundant #include <linux/kconfig.h> 2016-10-11 15:06:33 -07:00
si2157.c [media] si2157: do not allow driver unbind 2016-07-08 16:54:54 -03:00
si2157.h treewide: remove redundant #include <linux/kconfig.h> 2016-10-11 15:06:33 -07:00
si2157_priv.h [media] si2157: detect if firmware is running 2016-05-06 10:07:45 -03:00
tda827x.c [media] tuners: constify dvb_tuner_ops structures 2016-09-19 16:23:21 -03:00
tda827x.h [media] Add and use IS_REACHABLE macro 2015-04-08 15:02:07 -03:00
tda8290.c [media] media: remove emacs editor variables 2014-12-22 17:52:20 -02:00
tda8290.h [media] Add and use IS_REACHABLE macro 2015-04-08 15:02:07 -03:00
tda9887.c [media] media: remove emacs editor variables 2014-12-22 17:52:20 -02:00
tda9887.h [media] Add and use IS_REACHABLE macro 2015-04-08 15:02:07 -03:00
tda18212.c [media] tuners: Drop owner assignment from i2c_driver 2015-08-11 13:01:32 -03:00
tda18212.h treewide: remove redundant #include <linux/kconfig.h> 2016-10-11 15:06:33 -07:00
tda18218.c [media] tuners: Don't use dynamic static allocation 2013-11-08 09:45:41 -02:00
tda18218.h treewide: remove redundant #include <linux/kconfig.h> 2016-10-11 15:06:33 -07:00
tda18218_priv.h [media] tda18218: switch to Kernel logging 2012-09-15 09:23:16 -03:00
tda18271-common.c [media] tda18271: Fix identation 2014-12-04 13:55:05 -02:00
tda18271-fe.c [media] tda18271: use prefix on all printk messages 2016-09-05 15:26:28 -03:00
tda18271-maps.c [media] media: remove emacs editor variables 2014-12-22 17:52:20 -02:00
tda18271-priv.h [media] tda18271: use prefix on all printk messages 2016-09-05 15:26:28 -03:00
tda18271.h [media] Add and use IS_REACHABLE macro 2015-04-08 15:02:07 -03:00
tea5761.c [media] tuners: constify dvb_tuner_ops structures 2016-09-19 16:23:21 -03:00
tea5761.h [media] Add and use IS_REACHABLE macro 2015-04-08 15:02:07 -03:00
tea5767.c [media] tuners: constify dvb_tuner_ops structures 2016-09-19 16:23:21 -03:00
tea5767.h [media] Add and use IS_REACHABLE macro 2015-04-08 15:02:07 -03:00
tua9001.c [media] tuners: Drop owner assignment from i2c_driver 2015-08-11 13:01:32 -03:00
tua9001.h [media] tua9001: various minor changes 2015-05-18 15:54:02 -03:00
tua9001_priv.h [media] tua9001: use div_u64() for frequency calculation 2015-05-18 15:55:14 -03:00
tuner-i2c.h [media] tuner-i2c: be consistent with I2C declaration 2015-06-23 10:01:45 -03:00
tuner-simple.c [media] tuners: constify dvb_tuner_ops structures 2016-09-19 16:23:21 -03:00
tuner-simple.h [media] Add and use IS_REACHABLE macro 2015-04-08 15:02:07 -03:00
tuner-types.c [media] tuner: add Sony BTF tuners 2013-03-24 12:11:35 -03:00
tuner-xc2028-types.h [media] media_tree: Fix spelling errors 2013-11-29 14:43:50 -02:00
tuner-xc2028.c xc2028: Fix use-after-free bug properly 2016-11-23 21:04:26 -02:00
tuner-xc2028.h [media] Add and use IS_REACHABLE macro 2015-04-08 15:02:07 -03:00
xc4000.c [media] xc4000: shut up a bogus smatch message 2016-02-23 07:14:02 -03:00
xc4000.h [media] Add and use IS_REACHABLE macro 2015-04-08 15:02:07 -03:00
xc5000.c [media] xc5000: fix memory corruption when unplugging device 2015-04-08 14:49:59 -03:00
xc5000.h treewide: remove redundant #include <linux/kconfig.h> 2016-10-11 15:06:33 -07:00