Petr Tesarik 08d2d00b29 /dev/mem: handle out-of-bounds read/write ...

The loff_t type may be wider than phys_addr_t (e.g. on 32-bit systems).
Consequently, the file offset may be truncated in the assignment.
Currently, /dev/mem wraps around, which may cause applications to read
or write incorrect regions of memory by accident.

Let's follow POSIX file semantics here and return 0 when reading from
and -EFBIG when writing to an offset that cannot be represented by a
phys_addr_t.

Note that the conditional is optimized out by the compiler if loff_t
has the same size as phys_addr_t.

Signed-off-by: Petr Tesarik <ptesarik@suse.cz>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

2014-02-15 11:51:02 -08:00

..

agp

drivers/char: delete non-required instances of include <linux/init.h>

2014-02-07 15:10:19 -08:00

hw_random

drivers/char: delete non-required instances of include <linux/init.h>

2014-02-07 15:10:19 -08:00

ipmi

drivers/char: delete non-required instances of include <linux/init.h>

2014-02-07 15:10:19 -08:00

mwave

drivers/char: delete non-required instances of include <linux/init.h>

2014-02-07 15:10:19 -08:00

pcmcia

tty: synclink: avoid sleep_on race

2014-01-07 17:05:21 -08:00

tpm

drivers/char: delete non-required instances of include <linux/init.h>

2014-02-07 15:10:19 -08:00

xilinx_hwicap

…

apm-emulation.c

apm-emulation: add hibernation APM events to support suspend2disk

2014-01-07 13:50:28 +01:00

applicom.c

…

applicom.h

…

bfin-otp.c

…

bsr.c

…

ds1302.c

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ds1620.c

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dsp56k.c

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dtlk.c

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efirtc.c

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generic_nvram.c

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genrtc.c

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hangcheck-timer.c

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hpet.c

ACPI: Clean up inclusions of ACPI header files

2013-12-07 01:03:14 +01:00

i8k.c

Merge branch 'hwmon-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jdelvare/staging

2014-01-29 18:56:27 -08:00

Kconfig

drivers/char/hpet.c: allow user controlled mmap for user processes

2013-11-13 12:09:11 +09:00

lp.c

char: Int overflow in lp_do_ioctl().

2013-12-18 16:39:54 -08:00

Makefile

Merge branch 'drm-next' of git://people.freedesktop.org/~airlied/linux

2014-01-29 20:49:12 -08:00

mbcs.c

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mbcs.h

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mem.c

/dev/mem: handle out-of-bounds read/write

2014-02-15 11:51:02 -08:00

misc.c

Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs

2013-11-13 15:34:18 +09:00

mmtimer.c

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msm_smd_pkt.c

treewide: Fix typos in printk

2013-12-19 15:10:49 +01:00

mspec.c

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nsc_gpio.c

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nvram.c

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nwbutton.c

char: nwbutton: open-code interruptible_sleep_on

2014-01-08 15:29:52 -08:00

nwbutton.h

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nwflash.c

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pc8736x_gpio.c

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ppdev.c

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ps3flash.c

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random.c

The /dev/random changes for 3.13 including a number of improvements in

2013-11-16 10:19:15 -08:00

raw.c

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rtc.c

various char drivers: remove deprecated IRQF_DISABLED

2013-10-16 12:36:10 -07:00

scx200_gpio.c

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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

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sonypi.c

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tb0219.c

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tile-srom.c

drivers/char: delete non-required instances of include <linux/init.h>

2014-02-07 15:10:19 -08:00

tlclk.c

tlclk: remove deprecated IRQF_DISABLED

2013-10-16 12:36:10 -07:00

toshiba.c

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ttyprintk.c

drivers/char: don't use module_init in non-modular ttyprintk.c

2014-01-13 14:57:20 -08:00

uv_mmtimer.c

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virtio_console.c

virtio_console: verify if queue is broken after virtqueue_get_buf()

2013-10-29 11:28:18 +10:30