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authorTetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>2011-09-10 15:27:12 +0900
committerJames Morris <jmorris@namei.org>2011-09-14 08:27:07 +1000
commita8f7640963ada66c412314c3559c11ff6946c1a5 (patch)
tree23d9fb5fe64bb431b610deb6c1b696356106f94d /security/tomoyo/Makefile
parent731d37aa70c7b9de3be6bf2c8287366223bf5ce5 (diff)
downloadlinux-stericsson-a8f7640963ada66c412314c3559c11ff6946c1a5.tar.gz
TOMOYO: Avoid race when retrying "file execute" permission check.
There was a race window that the pathname which is subjected to "file execute" permission check when retrying via supervisor's decision because the pathname was recalculated upon retry. Though, there is an inevitable race window even without supervisor, for we have to calculate the symbolic link's pathname from "struct linux_binprm"->filename rather than from "struct linux_binprm"->file because we cannot back calculate the symbolic link's pathname from the dereferenced pathname. Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> Signed-off-by: James Morris <jmorris@namei.org>
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