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authorMika Westerberg <mika.westerberg@linux.intel.com>2017-06-29 14:19:50 +0300
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2017-07-17 15:55:08 +0200
commit800161bd0209a8db77f66af283c379ff8d58d88d (patch)
treebf8ed2c9a581723f5879443fd0b35331649a24fe /Documentation/accounting/delay-accounting.txt
parent6463a4571ceefc43908df4b016d8d5d8b8e85357 (diff)
downloadlinux-800161bd0209a8db77f66af283c379ff8d58d88d.tar.bz2
thunderbolt: Correct access permissions for active NVM contents
Firmware upgrade tools that decide which NVM image should be uploaded to the Thunderbolt controller need to access active parts of the NVM even if they are not run as root. The information in active NVM is not considered security critical so we can use the default permissions set by the NVMem framework. Writing the NVM image is still left as root only operation. While there mark the active NVM as read-only in the filesystem. Reported-by: Yehezkel Bernat <yehezkel.bernat@intel.com> Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com> Signed-off-by: Andreas Noever <andreas.noever@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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