Bug 450378

Summary:	ptrace: Stepping out of a signal handler runs away
Product:	[Fedora] Fedora	Reporter:	Jan Kratochvil <jan.kratochvil>
Component:	kernel	Assignee:	Roland McGrath <roland>
Status:	CLOSED CURRENTRELEASE	QA Contact:	Fedora Extras Quality Assurance <extras-qa>
Severity:	low	Docs Contact:
Priority:	low
Version:	9	CC:	kernel-maint, mjw
Target Milestone:	---
Target Release:	---
Hardware:	i686
OS:	Linux
Whiteboard:
Fixed In Version:	kernel-2.6.25.9-76.fc9.x86_64	Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2008-07-22 22:48:44 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:	441406
Bug Blocks:

Description Jan Kratochvil 2008-06-07 09:17:02 UTC

+++ This bug was initially created as a clone of Bug #441406 +++

Description of problem:
On repeated PTRACE_SINGLESTEP when a signal gets delivered the signal handler
gets traced but on the `int 0x80' of `__kernel_sigreturn' it starts to
PTRACE_CONT instead.

Version-Release number of selected component (if applicable):
FAILs kernel-2.6.25.4-30.fc9.i686

How reproducible:
Always.

Steps to Reproduce:
wget -O step-through-sigret.c
'http://sources.redhat.com/cgi-bin/cvsweb.cgi/~checkout~/tests/ptrace-tests/tests/step-through-sigret.c?cvsroot=systemtap';
gcc -o step-through-sigret step-through-sigret.c -Wall -ggdb2 -D_GNU_SOURCE;
./step-through-sigret; echo $?

Actual results:
1

Expected results:
0

Comment 1 Jan Kratochvil 2008-07-22 22:48:44 UTC

Thanks, verified as fixed on kernel-2.6.25.9-76.fc9.x86_64.