Mark Johnston 48fcd357c4 Avoid dereferencing curthread->td_proc->p_cred in DTrace probe context. ... When a process is exiting, there is a narrow window where p_cred may be NULL while its threads are still executing. Specifically, the last thread to exit a process sets the process state to PRS_ZOMBIE with the proc spinlock held and then calls thread_exit(). thread_exit() drops the spin lock, permitting the process to be reaped and thus causing its cred struct to be released. However, the exiting thread may still cause DTrace probes to fire by calling sched_throw(), resulting in a double fault if such a probe enabling attempts to access the GID or UID DIF variables. The thread's cred reference is not susceptible to this race since it is not released until after the thread has exited. MFC after: 1 week		2015-08-02 00:11:56 +00:00
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common	Rename zfs nvpair files to not colidate with our nvlist.	2015-07-09 21:53:40 +00:00
uts	Avoid dereferencing curthread->td_proc->p_cred in DTrace probe context.	2015-08-02 00:11:56 +00:00
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