Note: This bug is displayed in read-only format because
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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.
$ 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
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
$ 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