Fixes are available
APAR status
Closed as program error.
Error description
When using the -qstackprotect feature, the system is throwing the stack smash error incorrectly in a function containing a variable length array. ===== Example Output ===== $ ./a.out *** stack smashing detected ***: program terminated IOT/Abort trap (core dumped) $
Local fix
N/A
Problem summary
PROBLEM DESCRIPTION: After defining a variable length array, the stack pointer is updated to increase the size of the stack. When loading the stack canary word at the end of a function, the offset used assumed that the stack pointer did not change, resulting in loading an incorrect value. USERS AFFECTED: Stack protect (-qstackprotect) users with source code containing variable length arrays.
Problem conclusion
Stack protect feature was corrected, and now loads the canary word from the correct location.
Temporary fix
Comments
APAR Information
APAR number
LI76633
Reported component name
XL C/C++ FOR LI
Reported component ID
5724X1400
Reported release
B10
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Special Attention
NoSpecatt / Xsystem
Submitted date
2012-02-06
Closed date
2012-02-06
Last modified date
2012-02-06
APAR is sysrouted FROM one or more of the following:
APAR is sysrouted TO one or more of the following:
Fix information
Fixed component name
XL C/C++ FOR LI
Fixed component ID
5724X1400
Applicable component levels
RB10 PSN IV09886
UP06/09/13
[{"Business Unit":{"code":"BU058","label":"IBM Infrastructure w\/TPS"},"Product":{"code":"SSXVZZ","label":"XL C\/C++ for Linux"},"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"B10","Line of Business":{"code":"LOB57","label":"Power"}}]
Document Information
Modified date:
17 October 2021