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| author | Dan Williams <dan.j.williams@intel.com> | 2016-01-20 14:37:22 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2016-01-20 17:12:18 -0800 |
| commit | 19a3dd7621af01b7e44a70d16beab59326c38824 (patch) | |
| tree | 16650f6fa77c50770a63acc32502fedf5a519290 /lib | |
| parent | 9fa686068a32ddf256df03982b3e3967c18654a8 (diff) | |
| download | lwn-19a3dd7621af01b7e44a70d16beab59326c38824.tar.gz lwn-19a3dd7621af01b7e44a70d16beab59326c38824.zip | |
Do not enable CONFIG_IO_STRICT_DEVMEM by default
Larry Finger reports:
"My PowerBook G4 Aluminum with a 32-bit PPC processor fails to boot for
the 4.4-git series".
This is likely due to X still needing /dev/mem access on this platform.
CONFIG_IO_STRICT_DEVMEM is not yet safe to turn on when
CONFIG_STRICT_DEVMEM=y.
Remove the default so that old configurations do not change behavior.
Fixes: 90a545e98126 ("restrict /dev/mem to idle io memory ranges")
Reported-by: Larry Finger <Larry.Finger@lwfinger.net>
Tested-by: Larry Finger <Larry.Finger@lwfinger.net>
Link: http://marc.info/?l=linux-kernel&m=145332012023825&w=2
Acked-by: Kees Cook <keescook@chromium.org>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Russell King <linux@arm.linux.org.uk>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/Kconfig.debug | 1 |
1 files changed, 0 insertions, 1 deletions
diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug index f75a33f29f6e..7d0b49c536c5 100644 --- a/lib/Kconfig.debug +++ b/lib/Kconfig.debug @@ -1919,7 +1919,6 @@ config STRICT_DEVMEM config IO_STRICT_DEVMEM bool "Filter I/O access to /dev/mem" depends on STRICT_DEVMEM - default STRICT_DEVMEM ---help--- If this option is disabled, you allow userspace (root) access to all io-memory regardless of whether a driver is actively using that |