diff options
| author | Rafael J. Wysocki <rjw@sisk.pl> | 2012-07-19 00:00:58 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2012-08-09 08:22:51 -0700 |
| commit | 4a8a3f40f83b93cb1a3f8392b669d8640c976448 (patch) | |
| tree | 183abe82866ddf32ee65999cf4b996a42080d014 | |
| parent | 8d0c5f5b12ef71e5656f2eae8dea498271c7cd75 (diff) | |
PM / Sleep: Require CAP_BLOCK_SUSPEND to use wake_lock/wake_unlock
commit 11388c87d2abca1f01975ced28ce9eacea239104 upstream.
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 <rjw@sisk.pl>
Acked-by: Michael Kerrisk <mtk.man-pages@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | 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 c8fba338007..8f50de394d2 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; |