locking/lockdep: Fix possible NULL deref
We can't invalidate xhlocks when we've not yet allocated any. Reported-by: NDmitry Vyukov <dvyukov@google.com> Signed-off-by: NPeter Zijlstra (Intel) <peterz@infradead.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: linux-kernel@vger.kernel.org Fixes: f52be570 ("locking/lockdep: Untangle xhlock history save/restore from task independence") Signed-off-by: NIngo Molnar <mingo@kernel.org>
Showing
想要评论请 注册 或 登录