*Synopsis*: ksh93 coredumps with script that calls trap
CR 6878981 changed on Jan 7 2010 by <User 1-5Q-1267>
=== Field ============ === New Value ============= === Old Value =============
Introduced in Release solaris_nevada
====================== =========================== ===========================
*Change Request ID*: 6878981
*Synopsis*: ksh93 coredumps with script that calls trap
Product: solaris
Category: shell
Subcategory: korn93
Type: Defect
Subtype:
Status: 3-Accepted
Substatus:
Priority: 2-High
Introduced In Release: solaris_nevada
Introduced In Build:
Responsible Engineer: <User 1-5Q-6085>
Keywords:
=== *Description* ============================================================
The following is a whittled-down test-case that, when run and takes certain
input (described below), causes ksh93 to crash.
----
#!/bin/ksh93
# Block all signals which could terminate the menu or return to a parent process
trap "" TSTP INT TERM ABRT QUIT
# Define the menu of commands and prompts
menu_items=( \
(menu_str="sleep" cmd="/bin/sleep 5" ) \
)
for ((;;)) ; do
# Take an entry (by number).
input=""
dummy=""
print -n "Please enter a number: "
read input dummy
(
trap - INT TERM ABRT QUIT
${menu_items[$input].cmd}
)
done
----
Run the above as follows:
strongheart:/home/schwartz/org/notes/ddu> bug.ksh
Please enter a number: 0
^CPlease enter a number: 0
^CSegmentation Fault (core dumped)
strongheart:/home/schwartz/org/notes/ddu>
Enter 0, ^C while sleep is running, enter 0 again, ^C again, while sleep is
running, and.... bammo!
Corefile attached.
Crash is somewhat random in that things which shouldn't affect the crash could,
for example "set -x" might cause it to crash differently. Based on this, my
guess is that theres some kind of memory corruption, a variable being
overwritten, etc, inside ksh93 proper.
A more complete script, from which the above was gleened, is also attached.
That script crashes when sleep is selected and then the first ^C is attempted.
System is an Ultra40 running OpenSolaris snv_121, fresh install.
*** (#1 of 1): 2009-09-03 20:47:26 GMT+00:00 <User 1-5Q-13671>
=== *Public Comments* ========================================================
=== *Workaround* =============================================================
=== *Additional Details* =====================================================
Targeted Release: solaris_nevada
Commit To Fix In Build:
Fixed In Build:
Integrated In Build:
Verified In Build:
See Also:
Duplicate of:
Hooks:
Hook1:
Hook2:
Hook3:
Hook4:
Hook5:
Hook6:
Program Management:
Root Cause:
Fix Affects Documentation: No
Fix Affects Localization: No
=== *History* ================================================================
Date Submitted: 2009-09-03 20:47:25 GMT+00:00
Submitted By: <User 1-5Q-13671>
Status Changed Date Updated Updated By
3-Accepted 2009-09-22 11:05:37 GMT+00:00 <User 1-5Q-6085>
=== *Service Request* ========================================================
Impact: Significant
Functionality: Primary
Severity: 2
Product Name: solaris
Product Release: solaris_nevada
Product Build:
Operating System: snv_121
Hardware: generic
Submitted Date: 2009-09-03 20:47:26 GMT+00:00
=== *Multiple Release (MR) Cluster* - 0 ======================================
