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[Bug uprobes/16662] return probe breaks functionality of rsync
- From: "jlebon at redhat dot com" <sourceware-bugzilla at sourceware dot org>
- To: systemtap at sourceware dot org
- Date: Thu, 06 Mar 2014 20:26:01 +0000
- Subject: [Bug uprobes/16662] return probe breaks functionality of rsync
- Auto-submitted: auto-generated
- References: <bug-16662-6586 at http dot sourceware dot org/bugzilla/>
https://sourceware.org/bugzilla/show_bug.cgi?id=16662
Jonathan Lebon <jlebon at redhat dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jlebon at redhat dot com
--- Comment #2 from Jonathan Lebon <jlebon at redhat dot com> ---
(In reply to c.bezemer@tudelft.nl from comment #0)
> When I try to run the following probe:
>
> probe
> process("/home/jenkins/workspace/test_systemtap_rsync_unittests/rsync/
> rsync").function("*") ?
> {
> printf("IN %s\n", probefunc());
> }
>
> probe
> process("/home/jenkins/workspace/test_systemtap_rsync_unittests/rsync/
> rsync").function("*").return
> {
> printf("OUT %s\n", probefunc());
> }
>
> The functionality of rsync breaks if the return probe is enabled. When the
> return probe is disabled, there is no problem.
>
> dmesg contains '[3021183.636783] rsync[10263]: segfault at 7fffffffe000 ip
> 00007fffffffe000 sp 00007fff32f44130 error 14'
>
> Kernel version: kernel 3.12-trunk-amd64
> Systemtap version: 2.4/0.157
Thanks for the report. More specifically, this occurs when placing a uretprobe
on the _start function.
Fedora BZ: https://bugzilla.redhat.com/show_bug.cgi?id=1073605
RHEL7 BZ: https://bugzilla.redhat.com/show_bug.cgi?id=1073627
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