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3d035f5806
linux/drivers/char
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Prarit Bhargava 3d035f5806 drivers/char/hpet.c: allow user controlled mmap for user processes 
The CONFIG_HPET_MMAP Kconfig option exposes the memory map of the HPET
registers to userspace.  The Kconfig help points out that in some cases
this can be a security risk as some systems may erroneously configure the
map such that additional data is exposed to userspace.

This is a problem for distributions -- some users want the MMAP
functionality but it comes with a significant security risk.  In an effort
to mitigate this risk, and due to the low number of users of the MMAP
functionality, I've introduced a kernel parameter, hpet_mmap_enable, that
is required in order to actually have the HPET MMAP exposed.

Signed-off-by: Prarit Bhargava <prarit@redhat.com>
Acked-by: Matt Wilson <msw@amazon.com>
Signed-off-by: Clemens Ladisch <clemens@ladisch.de>
Cc: Randy Dunlap <rdunlap@infradead.org>
Cc: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-11-13 12:09:11 +09:00
..
agp parisc: agp/parisc-agp: allow binding of user memory to the AGP GART 2013-07-31 23:42:00 +02:00
hw_random DeviceTree updates for 3.13. This is a bit larger pull request than 2013-11-12 16:52:17 +09:00
ipmi BMC support for PARISC machines 2013-09-05 08:34:32 -07:00
mwave mwave: fix info leak in mwave_ioctl() 2013-07-09 10:33:28 -07:00
pcmcia pcmcia: synclink_cs: replace sum of bitmasks with OR operation. 2013-07-26 17:59:07 -07:00
tpm tpm: xen-tpmfront: fix missing declaration of xen_domain 2013-10-10 14:38:27 +00:00
xilinx_hwicap char: hwicap: Remove unnecessary dev_set_drvdata() 2013-10-03 16:03:31 -07:00
apm-emulation.c Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/apm 2012-04-05 17:34:30 -07:00
applicom.c applicom: use correct array offset 2013-03-15 12:23:48 -07:00
applicom.h
bfin-otp.c
bsr.c drivers: clean-up prom.h implicit includes 2013-10-09 20:04:04 -05:00
ds1302.c Remove all #inclusions of asm/system.h 2012-03-28 18:30:03 +01:00
ds1620.c ds1620: single_open() leak 2013-05-05 00:11:29 -04:00
dsp56k.c new helper: file_inode(file) 2013-02-22 23:31:31 -05:00
dtlk.c new helper: file_inode(file) 2013-02-22 23:31:31 -05:00
efirtc.c rtc: single_open() leaks 2013-05-05 00:12:29 -04:00
generic_nvram.c drivers: fix up various ->llseek() implementations 2011-07-20 20:47:58 -04:00
genrtc.c rtc: single_open() leaks 2013-05-05 00:12:29 -04:00
hangcheck-timer.c
hpet.c drivers/char/hpet.c: allow user controlled mmap for user processes 2013-11-13 12:09:11 +09:00
i8k.c module_param: make bool parameters really bool (drivers & misc) 2012-01-13 09:32:20 +10:30
Kconfig drivers/char/hpet.c: allow user controlled mmap for user processes 2013-11-13 12:09:11 +09:00
lp.c Char: lp, protect LPGETSTATUS with port_mutex 2013-05-16 18:08:58 -07:00
Makefile IPMI: Change link order 2012-10-16 18:07:12 -07:00
mbcs.c char: remove use of __devinitconst 2012-11-21 12:55:19 -08:00
mbcs.h Fix common misspellings 2011-03-31 11:26:23 -03:00
mem.c /dev/oldmem: Remove the interface 2013-07-03 16:08:03 -07:00
misc.c Drivers: char: misc: 'misc_deregister()' changed the 'mutex_unlock' logic upon an error 2013-09-26 08:53:23 -07:00
mmtimer.c drivers/char/mmtimer.c: Remove useless kfree 2012-09-26 13:20:40 -07:00
msm_smd_pkt.c drivers/char/msm_smd_pkt.c: don't use IS_ERR() 2011-08-25 16:25:33 -07:00
mspec.c char: Use vma_pages() to replace (vm_end - vm_start) >> PAGE_SHIFT 2013-05-21 10:07:54 -07:00
nsc_gpio.c new helper: file_inode(file) 2013-02-22 23:31:31 -05:00
nvram.c Remove all #inclusions of asm/system.h 2012-03-28 18:30:03 +01:00
nwbutton.c various char drivers: remove deprecated IRQF_DISABLED 2013-10-16 12:36:10 -07:00
nwbutton.h
nwflash.c Merge branch 'late/fixes' into fixes 2012-10-07 07:22:32 -07:00
pc8736x_gpio.c pc8736x_gpio: use platform_device_unregister in pc8736x_gpio_cleanup() 2012-10-24 15:52:29 -07:00
ppdev.c new helper: file_inode(file) 2013-02-22 23:31:31 -05:00
ps3flash.c ps3flash: switch to generic_file_llseek_size() 2013-06-29 12:57:33 +04:00
random.c These patches are designed to enable improvements to /dev/random for 2013-10-10 12:31:43 -07:00
raw.c new helper: file_inode(file) 2013-02-22 23:31:31 -05:00
rtc.c various char drivers: remove deprecated IRQF_DISABLED 2013-10-16 12:36:10 -07:00
scx200_gpio.c
snsc_event.c various char drivers: remove deprecated IRQF_DISABLED 2013-10-16 12:36:10 -07:00
snsc.c various char drivers: remove deprecated IRQF_DISABLED 2013-10-16 12:36:10 -07:00
snsc.h headers: kobject.h redux 2011-01-10 08:51:44 -08:00
sonypi.c ACPI: Remove the old /proc/acpi/event interface 2013-07-15 13:56:36 +02:00
tb0219.c new helper: file_inode(file) 2013-02-22 23:31:31 -05:00
tile-srom.c PTR_RET() is a weird name, and led to some confusing usage. We ended 2013-09-04 17:31:11 -07:00
tlclk.c tlclk: remove deprecated IRQF_DISABLED 2013-10-16 12:36:10 -07:00
toshiba.c
ttyprintk.c ttyprintk: Fix NULL pointer deref by setting tty_port ops after initializing port 2013-05-21 10:13:23 -07:00
uv_mmtimer.c
virtio_console.c virtio: console: prevent use-after-free of port name in port unplug 2013-08-09 13:02:16 +09:30