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Subject: Re: [PATCH 0/2] fix the long standing exec vs kill race
From: Simon Holm =?ISO-8859-1?Q?Th=F8gersen?= <odie@cs.aau.dk>
To: Oleg Nesterov <oleg@tv-sign.ru>
Cc: Andrew Morton <akpm@linux-foundation.org>,
       Davide Libenzi <davidel@xmailserver.org>, Ingo Molnar <mingo@elte.hu>,
       Linus Torvalds <torvalds@linux-foundation.org>,
       Roland McGrath <roland@redhat.com>, linux-kernel@vger.kernel.org
In-Reply-To: <20071202151454.GA13180@tv-sign.ru>
References: <20071202151454.GA13180@tv-sign.ru>
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Date: Sun, 02 Dec 2007 18:06:33 +0100
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søn, 02 12 2007 kl. 18:14 +0300, skrev Oleg Nesterov:
> Depends on
> 	[PATCH] __group_complete_signal: fix coredump with group stop race
> 	http://marc.info/?l=linux-kernel&m=119653436116036
> 
> Needs review and testing.
> 
> Please comment, I think at least the idea is promising.
> 
I have an issue that sounds related, but I might be completely off. I
would expect the simple attached program to keep receiving the same
signal, i.e. respond to
	killall signal-exec -s SIGHUP

I tried your patches, but they didn't help.

Any ideas?


Simon Holm Thøgersen

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#include <signal.h>
#include <stdio.h>
#include <unistd.h>

static char **argv_;

static void handler(int signal)
{
	printf("got signal %d\n", signal);
	execv(argv_[0], argv_);
}

int main(int argc, char *argv[])
{
	printf("spawned\n");
	argv_ = argv;
	if (signal(SIGTERM, handler) == SIG_ERR)
		err(1, "could not set signal handler for SIGTERM");
	if (signal(SIGHUP, handler) == SIG_ERR)
		err(1, "could not set signal handler for SIGTERM");
	sleep(60);
	return 0;
}


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