application core created on kernel 3.0.101-108.35 not readable

This document (7022975) is provided subject to the disclaimer at the end of this document.

Environment


SUSE Linux Enterprise Server 11 Service Pack 4 (SLES 11 SP4)
SUSE Linux Enterprise Server 11 for SAP Applications Service Pack 4

Situation

An application crashes and writes a core dump.
To analyze the issue the core file needs to opened in a debugger, but the core cannot be read easily.
gdb stops with: "Backtrace stopped: Cannot access memory at address 0x2b"

Example:
sles11sp4-lvm:~ # gdb ./core-108.35
GNU gdb (GDB; SUSE Linux Enterprise 11) 7.9.1
...
[New LWP 22994]
Reading symbols from /usr/bin/yes...Reading symbols from
/usr/lib/debug/usr/bin/yes.debug...done.
done.
Core was generated by `yes yes'.
Program terminated with signal SIGSEGV, Segmentation fault.
#0  0x0000000000000033 in ?? ()
(gdb) bt
#0  0x0000000000000033 in ?? ()
Backtrace stopped: Cannot access memory at address 0x2b
(gdb)


Resolution

This issue is fixed with a subsequently released kernel update.
Make sure to update the kernel to anything higher than  3.0.101-108.41.

Cause

This issue is caused by an incomplete fix for Spectre and Meltdown and only can occur with kernel 3.0.101-108.35.

Additional Information


Disclaimer

This Support Knowledgebase provides a valuable tool for SUSE customers and parties interested in our products and solutions to acquire information, ideas and learn from one another. Materials are provided for informational, personal or non-commercial use within your organization and are presented "AS IS" WITHOUT WARRANTY OF ANY KIND.

  • Document ID:7022975
  • Creation Date: 17-May-2018
  • Modified Date:03-Mar-2020
    • SUSE Linux Enterprise Server
    • SUSE Linux Enterprise Server for SAP Applications

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