commit: 11388c87d2abca1f01975ced28ce9eacea239104 From: Rafael J. Wysocki <[email protected]> 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 <[email protected]> Cc: [email protected] Acked-by: Michael Kerrisk <[email protected]> --- kernel/power/wakelock.c | 7 +++++++ 1 files changed, 7 insertions(+), 0 deletions(-) diff --git a/kernel/power/wakelock.c b/kernel/power/wakelock.c index c8fba33..8f50de3 100644 --- a/kernel/power/wakelock.c +++ b/kernel/power/wakelock.c @@ -9,6 +9,7 @@ * manipulate wakelocks on Android. */ +#include <linux/capability.h> #include <linux/ctype.h> #include <linux/device.h> #include <linux/err.h> @@ -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; -- 1.7.3.4 -- To unsubscribe from this list: send the line "unsubscribe stable" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
