tree 4f484333268919be0487ff5fdf9dd380d8bf6ed2
parent e4f5f26d8336318a5aa0858223c81cf29fcf5f68
author Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> 1301757174 +0900
committer James Morris <jmorris@namei.org> 1303169832 +1000

TOMOYO: Fix infinite loop bug when reading /sys/kernel/security/tomoyo/audit

In tomoyo_flush(), head->r.w[0] holds pointer to string data to be printed.
But head->r.w[0] was updated only when the string data was partially
printed (because head->r.w[0] will be updated by head->r.w[1] later if
completely printed). However, regarding /sys/kernel/security/tomoyo/query ,
an additional '\0' is printed after the string data was completely printed.
But if free space for read buffer became 0 before printing the additional '\0',
tomoyo_flush() was returning without updating head->r.w[0]. As a result,
tomoyo_flush() forever reprints already printed string data.

Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Signed-off-by: James Morris <jmorris@namei.org>