Commit 4b00d949 authored Mar 08, 2016 by Mitko Haralanov Committed by Doug Ledford Mar 21, 2016

IB/hfi1: Prevent NULL pointer dereference



Prevent a potential NULL pointer dereference (found
by code inspection) when unregistering an MMU handler.

Reviewed-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Reviewed-by: Dean Luick <dean.luick@intel.com>
Signed-off-by: Mitko Haralanov <mitko.haralanov@intel.com>
Signed-off-by: Jubin John <jubin.john@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>

parent c81e1f64

drivers/staging/rdma/hfi1/mmu_rb.c

+3 −0

Original line number	Diff line number	Diff line
		@@ -107,6 +107,9 @@ void hfi1_mmu_rb_unregister(struct rb_root *root)
		struct mmu_rb_handler *handler = find_mmu_handler(root);
		unsigned long flags;

		if (!handler)
		return;

		spin_lock_irqsave(&mmu_rb_lock, flags);
		list_del(&handler->list);
		spin_unlock_irqrestore(&mmu_rb_lock, flags);