staging: logger: hold mutex while removing reader
The readers list is traversed under the log->mutex lock
(for example from fix_up_readers()), but the deletion of
elements from this list is not being done under this lock.
Cc: Brian Swetland <swetland@google.com>
Cc: Dima Zavin <dima@android.com>
Signed-off-by: Rabin Vincent <rabin.vincent@stericsson.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/drivers/staging/android/logger.c b/drivers/staging/android/logger.c
index 0d2367f..ea69b6a 100644
--- a/drivers/staging/android/logger.c
+++ b/drivers/staging/android/logger.c
@@ -459,7 +459,12 @@
{
if (file->f_mode & FMODE_READ) {
struct logger_reader *reader = file->private_data;
+ struct logger_log *log = reader->log;
+
+ mutex_lock(&log->mutex);
list_del(&reader->list);
+ mutex_unlock(&log->mutex);
+
kfree(reader);
}