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Re: [PATCH 1/2] signals: kill(-1) should only signal processes in the same namespace [message #32040 is a reply to message #32038]

Thu, 17 July 2008 17:50

ebiederm
Messages: 1354
Registered: February 2006

Senior Member

Oleg Nesterov <oleg@tv-sign.ru> writes:

> kill_something_info() can't walk threads, think about the realtime signals.

walking threads is fine delivering signals to non thread group leaders is
a problem.

> Anyway, I think we should change kill_something_info(-1) to use rcu_read_lock()
> instead of tasklist.

Being dense I think the locking implications of a correct implementation are more
then we are ready to deal with to fix this bug.  Although I remember discussing
it and seeing something reasonable.

Eric

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[Message index]

		[PATCH 1/2] signals: kill(-1) should only signal processes in the same namespace By: Daniel Hokka Zakrisso on Thu, 17 July 2008 14:55
		Re: [PATCH 1/2] signals: kill(-1) should only signal processes in the same namespace By: Pavel Emelianov on Thu, 17 July 2008 15:01
		Re: [PATCH 1/2] signals: kill(-1) should only signal processes in the same namespace By: Daniel Hokka Zakrisso on Thu, 17 July 2008 15:24
		Re: [PATCH 1/2] signals: kill(-1) should only signal processes in the same namespace By: Pavel Emelianov on Thu, 17 July 2008 15:54
		Re: [PATCH 1/2] signals: kill(-1) should only signal processes in the same namespace By: Oleg Nesterov on Thu, 17 July 2008 17:31
		Re: [PATCH 1/2] signals: kill(-1) should only signal processes in the same namespace By: ebiederm on Thu, 17 July 2008 17:50
		Re: [PATCH 1/2] signals: kill(-1) should only signal processes in the same namespace By: ebiederm on Thu, 17 July 2008 17:45
		Re: [PATCH 1/2] signals: kill(-1) should only signal processes in the same namespace By: Daniel Hokka Zakrisso on Thu, 17 July 2008 18:39
		Re: [PATCH 1/2] signals: kill(-1) should only signal processes in the same namespace By: ebiederm on Thu, 17 July 2008 18:45
		Re: [PATCH 1/2] signals: kill(-1) should only signal processes in the same namespace By: Sukadev Bhattiprolu on Thu, 17 July 2008 18:13
		Re: [PATCH 1/2] signals: kill(-1) should only signal processes in the same namespace By: Daniel Hokka Zakrisso on Thu, 17 July 2008 18:44
		Re: [PATCH 1/2] signals: kill(-1) should only signal processes in the same namespace By: ebiederm on Thu, 17 July 2008 18:46
		Re: [PATCH 1/2] signals: kill(-1) should only signal processes in the same namespace By: Oleg Nesterov on Wed, 23 July 2008 14:33
		Re: [PATCH 1/2] signals: kill(-1) should only signal processes in the same namespace By: Daniel Hokka Zakrisso on Wed, 23 July 2008 16:09

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