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Bug 1129569

Summary: [abrt] strace: init(): strace killed by SIGSEGV
Product: [Fedora] Fedora Reporter: Michal Toman <mtoman>
Component: straceAssignee: Dmitry V. Levin <ldv>
Status: CLOSED RAWHIDE QA Contact: Fedora Extras Quality Assurance <extras-qa>
Severity: unspecified Docs Contact:
Priority: unspecified    
Version: 21CC: dan, dvlasenk, ldv, normand, rvokal, schwab
Target Milestone: ---   
Target Release: ---   
Hardware: ppc64le   
OS: Unspecified   
Whiteboard: abrt_hash:552ea56d72903168d4414960fd5a0336474e6e12
Fixed In Version: 4.9-1 Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of:
: 1129572 (view as bug list) Environment:
Last Closed: 2014-08-19 14:20:41 UTC Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Bug Depends On:    
Bug Blocks: 1051573, 1129572    
Attachments:
Description Flags
File: backtrace
none
File: cgroup
none
File: core_backtrace
none
File: dso_list
none
File: environ
none
File: exploitable
none
File: limits
none
File: maps
none
File: open_fds
none
File: proc_pid_status
none
File: var_log_messages
none
strace-ppc-ptrace-proto.patch none

Description Michal Toman 2014-08-13 08:44:28 UTC 
Description of problem:
Getting a segmentation fault when trying to attach to a process on ppc64le. Only happens when attaching, running '$ strace cmd' works fine.

Version-Release number of selected component:
strace-4.8-5.fc21

Additional info:
reporter:       libreport-2.2.3
backtrace_rating: 4
cmdline:        strace -p 3250
crash_function: init
executable:     /usr/bin/strace
kernel:         3.14.0-1.fc21.ppc64le
runlevel:       N 5
type:           CCpp
uid:            1002

Truncated backtrace:
Thread no. 1 (3 frames)
 #0 newoutf at strace.c:644
 #1 startup_attach at strace.c:976
 #2 init at strace.c:1836
Comment 1 Michal Toman 2014-08-13 08:44:32 UTC 
Created attachment 926313 [details]
File: backtrace
Comment 2 Michal Toman 2014-08-13 08:44:33 UTC 
Created attachment 926314 [details]
File: cgroup
Comment 3 Michal Toman 2014-08-13 08:44:34 UTC 
Created attachment 926315 [details]
File: core_backtrace
Comment 4 Michal Toman 2014-08-13 08:44:35 UTC 
Created attachment 926316 [details]
File: dso_list
Comment 5 Michal Toman 2014-08-13 08:44:37 UTC 
Created attachment 926317 [details]
File: environ
Comment 6 Michal Toman 2014-08-13 08:44:38 UTC 
Created attachment 926318 [details]
File: exploitable
Comment 7 Michal Toman 2014-08-13 08:44:39 UTC 
Created attachment 926319 [details]
File: limits
Comment 8 Michal Toman 2014-08-13 08:44:40 UTC 
Created attachment 926320 [details]
File: maps
Comment 9 Michal Toman 2014-08-13 08:44:42 UTC 
Created attachment 926321 [details]
File: open_fds
Comment 10 Michal Toman 2014-08-13 08:44:43 UTC 
Created attachment 926322 [details]
File: proc_pid_status
Comment 11 Michal Toman 2014-08-13 08:44:44 UTC 
Created attachment 926323 [details]
File: var_log_messages
Comment 12 Dmitry V. Levin 2014-08-13 08:53:27 UTC 
Could you check whether upstream version from git://git.code.sf.net/p/strace/code passes "make check" on that platform, please?
Comment 13 Michal Toman 2014-08-13 08:59:58 UTC 
The testsuite passes. The strace binary built within that tree does not have the problem - no segfault when attaching to system processes.
Comment 14 Dmitry V. Levin 2014-08-13 09:38:57 UTC 
(In reply to Michal Toman from comment #13)
> The testsuite passes. The strace binary built within that tree does not have
> the problem - no segfault when attaching to system processes.

Thanks for testing.  So this bug will be fixed in strace-4.9 which I'm going to release soon.
Comment 15 Michel Normand 2014-08-13 11:07:33 UTC 
note that this is very similar to an opensuse bug https://bugzilla.novell.com/show_bug.cgi?id=865151
that pointed to same error and was solved by upstream commit
https://sourceforge.net/p/strace/code/ci/03ef0b2665363adf6100bc4af479a14b5f17bc27/
Comment 16 Michal Toman 2014-08-13 11:57:58 UTC 
Created attachment 926378 [details]
strace-ppc-ptrace-proto.patch

The commit fixes the problem. Since the upstream patch does not apply to Fedora dist git, attaching a modified version that does.
Comment 17 Dan Horák 2014-08-13 12:07:04 UTC 
(In reply to Dmitry V. Levin from comment #14)
> (In reply to Michal Toman from comment #13)
> > The testsuite passes. The strace binary built within that tree does not have
> > the problem - no segfault when attaching to system processes.
> 
> Thanks for testing.  So this bug will be fixed in strace-4.9 which I'm going
> to release soon.

Dmitry, do you have any guess when it might happen?
Comment 18 Dmitry V. Levin 2014-08-13 12:14:25 UTC 
(In reply to Dan Horák from comment #17)
> (In reply to Dmitry V. Levin from comment #14)
> > (In reply to Michal Toman from comment #13)
> > > The testsuite passes. The strace binary built within that tree does not have
> > > the problem - no segfault when attaching to system processes.
> > 
> > Thanks for testing.  So this bug will be fixed in strace-4.9 which I'm going
> > to release soon.
> 
> Dmitry, do you have any guess when it might happen?

I hope it'll happen this week.