Date: Mon, 13 Apr 2009 10:41:30 GMT From: Mateusz Guzik <mjguzik@gmail.com> To: freebsd-gnats-submit@FreeBSD.org Subject: bin/133700: [truss] If traced process is killed by signal, truss enters infinite loop Message-ID: <200904131041.n3DAfUWp090937@www.freebsd.org> Resent-Message-ID: <200904131050.n3DAo1C0058072@freefall.freebsd.org>
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>Number: 133700
>Category: bin
>Synopsis: [truss] If traced process is killed by signal, truss enters infinite loop
>Confidential: no
>Severity: non-critical
>Priority: medium
>Responsible: freebsd-bugs
>State: open
>Quarter:
>Keywords:
>Date-Required:
>Class: sw-bug
>Submitter-Id: current-users
>Arrival-Date: Mon Apr 13 10:50:00 UTC 2009
>Closed-Date:
>Last-Modified:
>Originator: Mateusz Guzik
>Release: 8.0-CURRENT
>Organization:
>Environment:
FreeBSD eternal 8.0-CURRENT FreeBSD 8.0-CURRENT #2: Sat Mar 28 00:24:50 CET 2009 f@eternal:/usr/obj/usr/src/sys/ETERNAL i386
>Description:
If traced process is killed by signal, truss enters infinite loop.
>How-To-Repeat:
Run the following program under truss: int main() {raise(11);}
>Fix:
The problem lies in setup.c:waitevent():
if (WIFSIGNALED(waitval)) {
info->pr_why = S_EXIT;
info->pr_why = 0;
return;
}
pr_why is zeroed just after its set to S_EXIT.
Patch attached with submission follows:
--- usr.bin/truss/setup.c.orig 2007-06-27 00:42:37.000000000 +0200
+++ usr.bin/truss/setup.c 2009-04-13 00:06:45.000000000 +0200
@@ -215,7 +215,7 @@
}
if (WIFSIGNALED(waitval)) {
info->pr_why = S_EXIT;
- info->pr_why = 0;
+ info->pr_data = 0;
return;
}
}
>Release-Note:
>Audit-Trail:
>Unformatted:
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