From 11388c87d2abca1f01975ced28ce9eacea239104 Mon Sep 17 00:00:00 2001 From: "Rafael J. Wysocki" Date: Thu, 19 Jul 2012 00:00:58 +0200 Subject: PM / Sleep: Require CAP_BLOCK_SUSPEND to use wake_lock/wake_unlock Require processes wanting to use the wake_lock/wake_unlock sysfs files to have the CAP_BLOCK_SUSPEND capability, which also is required for the eventpoll EPOLLWAKEUP flag to be effective, so that all interfaces related to blocking autosleep depend on the same capability. Signed-off-by: Rafael J. Wysocki Cc: stable@vger.kernel.org Acked-by: Michael Kerrisk --- kernel/power/wakelock.c | 7 +++++++ 1 file changed, 7 insertions(+) (limited to 'kernel/power') diff --git a/kernel/power/wakelock.c b/kernel/power/wakelock.c index c8fba3380076..8f50de394d22 100644 --- a/kernel/power/wakelock.c +++ b/kernel/power/wakelock.c @@ -9,6 +9,7 @@ * manipulate wakelocks on Android. */ +#include #include #include #include @@ -188,6 +189,9 @@ int pm_wake_lock(const char *buf) size_t len; int ret = 0; + if (!capable(CAP_BLOCK_SUSPEND)) + return -EPERM; + while (*str && !isspace(*str)) str++; @@ -231,6 +235,9 @@ int pm_wake_unlock(const char *buf) size_t len; int ret = 0; + if (!capable(CAP_BLOCK_SUSPEND)) + return -EPERM; + len = strlen(buf); if (!len) return -EINVAL; -- cgit v1.2.3