freezer,umh: Fix call_usermode_helper_exec() vs SIGKILL
commit eedeb787 upstream. Tetsuo-San noted that commit f5d39b02 ("freezer,sched: Rewrite core freezer logic") broke call_usermodehelper_exec() for the KILLABLE case. Specifically it was missed that the second, unconditional, wait_for_completion() was not optional and ensures the on-stack completion is unused before going out-of-scope. Fixes: f5d39b02 ("freezer,sched: Rewrite core freezer logic") Reported-by:<syzbot+6cd18e123583550cf469@syzkaller.appspotmail.com> Reported-by:
Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> Debugged-by:
Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> Signed-off-by:
Peter Zijlstra (Intel) <peterz@infradead.org> Link: https://lkml.kernel.org/r/Y90ar35uKQoUrLEK@hirez.programming.kicks-ass.net Signed-off-by:
Greg Kroah-Hartman <gregkh@linuxfoundation.org>
parent
854e1ecf
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