freezer: fix kthread_create vs freezer theoretical race

kthread() sleeps in TASK_INTERRUPTIBLE state waiting for the first wakeup.  In
theory, this wakeup may come from freeze_process()->signal_wake_up(), so the
task can disappear even before kthread_create() sets its ->comm.

Change kthread() to use TASK_UNINTERRUPTIBLE.

[[email protected]: s/BUG_ON/WARN_ON+recover]
Signed-off-by: Oleg Nesterov <[email protected]>
Acked-by: "Eric W. Biederman" <[email protected]>
Signed-off-by: Rafael J. Wysocki <[email protected]>
Cc: Gautham R Shenoy <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>

0 files changed, 0 insertions, 0 deletions