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Bug 1158713 - ltrace assigns wrong names to glibc PLT slots
Summary: ltrace assigns wrong names to glibc PLT slots
Keywords:
Status: CLOSED ERRATA
Alias: None
Product: Red Hat Enterprise Linux 7
Classification: Red Hat
Component: ltrace
Version: 7.0
Hardware: Unspecified
OS: Unspecified
unspecified
unspecified
Target Milestone: rc
: ---
Assignee: Jeff Law
QA Contact: Martin Cermak
URL:
Whiteboard:
Depends On:
Blocks: 1110700 1191021
TreeView+ depends on / blocked
 
Reported: 2014-10-30 00:52 UTC by Petr Machata
Modified: 2015-11-19 03:30 UTC (History)
4 users (show)

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Prior to this update, the ltrace utility incorrectly associated Procedure Linkage Table (PLT) slots with symbols from the symbol table. Consequently, when tracing of a certain symbol was requested, a different symbol could have been traced instead. This bug has been fixed, and initialization of the PLT slot map now works correctly.
Clone Of:
Environment:
Last Closed: 2015-11-19 03:30:25 UTC
Target Upstream Version:
Embargoed:


Attachments (Terms of Use)
Packaging patch (6.48 KB, patch)
2015-03-05 23:37 UTC, Petr Machata
no flags Details | Diff


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHBA-2015:2141 0 normal SHIPPED_LIVE ltrace bug fix update 2015-11-19 07:40:19 UTC

Description Petr Machata 2014-10-30 00:52:52 UTC
$ ltrace -e free ls
libc.so.6->free(0x5)           = <void>
libc.so.6->free(0x78)          = <void>
libc.so.6->free(0xc)           = <void>
libc.so.6->free(0x308)         = <void>
    
Note the nonsense values passed to free.  The problem is that these are not free calls at all, but malloc calls that are assigned to wrong PLT slots.

Version-Release number of selected component (if applicable):
ltrace-0.7.91-9.el7.x86_64

Additional info:
A fix is available:
http://lists.alioth.debian.org/pipermail/ltrace-commits/Week-of-Mon-20141027/000188.html

Comment 4 Petr Machata 2015-03-05 23:37:46 UTC
Created attachment 998602 [details]
Packaging patch

Comment 8 Martin Cermak 2015-09-18 17:22:24 UTC
Verified against ltrace-0.7.91-14.el7.

Comment 10 errata-xmlrpc 2015-11-19 03:30:25 UTC
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://rhn.redhat.com/errata/RHBA-2015-2141.html


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