linux-kernel - [PATCH] emit logging when a process receives a fatal signal

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Message-ID: <20061118010946.GB31268@vanheusden.com>
Date:	Sat, 18 Nov 2006 02:09:46 +0100
From:	Folkert van Heusden <folkert@...heusden.com>
To:	linux-kernel@...r.kernel.org
Subject: [PATCH] emit logging when a process receives a fatal signal

Hi,

I found that sometimes processes disappear on some heavily used system
of mine without any logging. So I've written a patch against 2.6.18.2
which emits logging when a process emits a fatal signal.

Signed-off-by: Folkert van Heusden <folkert@...heusden.com>

--- linux-2.6.18.2/kernel/signal.c	2006-11-04 02:33:58.000000000 +0100
+++ linux-2.6.18.2.new/kernel/signal.c	2006-11-17 15:59:13.000000000 +0100
@@ -706,6 +706,15 @@
 	struct sigqueue * q = NULL;
 	int ret = 0;
 
+	if (sig == SIGQUIT || sig == SIGILL  || sig == SIGTRAP ||
+	    sig == SIGABRT || sig == SIGBUS  || sig == SIGFPE  ||
+	    sig == SIGSEGV || sig == SIGXCPU || sig == SIGXFSZ ||
+	    sig == SIGSYS  || sig == SIGSTKFLT)
+	{
+		printk(KERN_WARNING "Sig %d send to %d owned by %d.%d (%s)\n",
+			sig, t -> pid, t -> uid, t -> gid, t -> comm);
+	}
+
 	/*
 	 * fast-pathed signals for kernel-internal things like SIGSTOP
 	 * or SIGKILL.


Folkert van Heusden

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