On 08/30, Russell King - ARM Linux admin wrote: > > which means that when probe_kernel_address() returns -EFAULT, the > destination is left uninitialised. In the case of > task_rcu_dereference(), this means that "siginfo" can be used without > having been initialised,
Yes, but this is fine, please see the long comment below (case 2). If probe_kernel_address() fails, "sighand" is not initialized. but this doesn't differ from the case when we inspect the random value if this task_struct was freed, then reallocated as another thing, then freed and reallocated as task_struct again. Oleg.
