Bug 143369 - strace -c: potential NULL dereference
strace -c: potential NULL dereference
Product: Fedora
Classification: Fedora
Component: strace (Show other bugs)
All Linux
medium Severity medium
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Assigned To: Roland McGrath
Brian Brock
Depends On:
  Show dependency treegraph
Reported: 2004-12-19 20:18 EST by Dmitry V. Levin
Modified: 2007-11-30 17:10 EST (History)
0 users

See Also:
Fixed In Version: RHBA-2005-130
Doc Type: Bug Fix
Doc Text:
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Clone Of:
Last Closed: 2005-02-01 23:42:40 EST
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Verified Versions:
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oVirt Team: ---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: ---

Attachments (Terms of Use)
strace-4.5.8-alt-call_summary.patch (641 bytes, patch)
2004-12-19 20:19 EST, Dmitry V. Levin
no flags Details | Diff

  None (edit)
Description Dmitry V. Levin 2004-12-19 20:18:04 EST
Description of problem:
When tracing trivial programs with "strace -c" and patch from #143365
not applied, call_summary() may call qsort() with unallocated counts[]
array which leads to segfault.

Version-Release number of selected component (if applicable):

Steps to Reproduce:
Actual results:

Assuming that /bin/true is trivial program which does just _exit(0)
$ strace -c /bin/true
Segmentation fault
Expected results:
$ strace -c /bin/true
% time     seconds  usecs/call     calls    errors syscall
------ ----------- ----------- --------- --------- ----------------
------ ----------- ----------- --------- --------- ----------------
100.00    0.000000                     0           total
Comment 1 Dmitry V. Levin 2004-12-19 20:19:27 EST
Created attachment 108869 [details]

Proposed patch.
Comment 2 Roland McGrath 2005-02-01 23:42:40 EST
I put the patch in.
Comment 3 Tim Powers 2005-05-19 17:10:03 EDT
An advisory has been issued which should help the problem
described in this bug report. This report is therefore being
closed with a resolution of ERRATA. For more information
on the solution and/or where to find the updated files,
please follow the link below. You may reopen this bug report
if the solution does not work for you.


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