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| author | Thomas Renninger <trenn@suse.de> | 2011-05-26 12:26:24 +0200 |
|---|---|---|
| committer | Len Brown <len.brown@intel.com> | 2011-05-29 01:50:40 -0400 |
| commit | 526b4af47f44148c9d665e57723ed9f86634c6e3 (patch) | |
| tree | 7906a3b45703aa730d5e7ebadc36a55aee5417ca /drivers/acpi/Kconfig | |
| parent | aecad432fd68dafa5b3b497c4816fbfce6fd4066 (diff) | |
| download | linux-stable-526b4af47f44148c9d665e57723ed9f86634c6e3.tar.gz linux-stable-526b4af47f44148c9d665e57723ed9f86634c6e3.tar.bz2 linux-stable-526b4af47f44148c9d665e57723ed9f86634c6e3.zip | |
ACPI: Split out custom_method functionality into an own driver
With /sys/kernel/debug/acpi/custom_method root can write
to arbitrary memory and increase his priveleges, even if
these are restricted.
-> Make this an own debug .config option and warn about the
security issue in the config description.
-> Still keep acpi/debugfs.c which now only creates an empty
/sys/kernel/debug/acpi directory. There might be other
users of it later.
Signed-off-by: Thomas Renninger <trenn@suse.de>
Acked-by: Rafael J. Wysocki <rjw@sisk.pl>
Acked-by: rui.zhang@intel.com
Signed-off-by: Len Brown <len.brown@intel.com>
Diffstat (limited to 'drivers/acpi/Kconfig')
| -rw-r--r-- | drivers/acpi/Kconfig | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/drivers/acpi/Kconfig b/drivers/acpi/Kconfig index 3a17ca5fff6f..d918e130bef3 100644 --- a/drivers/acpi/Kconfig +++ b/drivers/acpi/Kconfig @@ -380,6 +380,21 @@ config ACPI_HED which is used to report some hardware errors notified via SCI, mainly the corrected errors. +config ACPI_CUSTOM_METHOD + tristate "Allow ACPI methods to be inserted/replaced at run time" + depends on DEBUG_FS + default n + help + This debug facility allows ACPI AML methods to me inserted and/or + replaced without rebooting the system. For details refer to: + Documentation/acpi/method-customizing.txt. + + NOTE: This option is security sensitive, because it allows arbitrary + kernel memory to be written to by root (uid=0) users, allowing them + to bypass certain security measures (e.g. if root is not allowed to + load additional kernel modules after boot, this feature may be used + to override that restriction). + source "drivers/acpi/apei/Kconfig" endif # ACPI |