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authorDan Williams <dan.j.williams@intel.com>2016-01-20 14:37:22 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2016-01-20 17:12:18 -0800
commit19a3dd7621af01b7e44a70d16beab59326c38824 (patch)
tree16650f6fa77c50770a63acc32502fedf5a519290 /lib
parent9fa686068a32ddf256df03982b3e3967c18654a8 (diff)
downloadlinux-19a3dd7621af01b7e44a70d16beab59326c38824.tar.bz2
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.debug1
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