Re: [PATCH v2 1/3] coredump: use get_task_comm for %e filenameformat

From: Oleg Nesterov
Date: Wed May 18 2011 - 09:02:24 EST

Sorry for delay,

On 05/12, Jiri Slaby wrote:
> We currently access current->comm directly. As we have
> prctl(PR_SET_NAME), we need the access be protected by task_lock. This
> is exactly what get_task_comm does, so use it.
> I'm not 100% convinced prctl(PR_SET_NAME) may be called at the time of
> core dump,

It can't be called. Apart from current, a sub-thread can change ->comm[]
via /proc/pid/comm, but we already killed all threads.

> but the locking won't hurt.

Agreed, the patch looks correct. but still unneeded.


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