Valgrind reports "Conditional jump or move depends on uninitialised value"

[John McCabe-Dansted]

Binary package hint: bash

This problem also occurs on 7.10 (As well as Hardy). This only seems to occur when using the "set" command to list the shell variables. Exact errors reported as below:

$ valgrind bash -c "set ; exit 0" > /dev/null
==8226== Memcheck, a memory error detector.
==8226== Copyright (C) 2002-2007, and GNU GPL'd, by Julian Seward et al.
==8226== Using LibVEX rev 1804, a library for dynamic binary translation.
==8226== Copyright (C) 2004-2007, and GNU GPL'd, by OpenWorks LLP.
==8226== Using valgrind-3.3.0-Debian, a dynamic binary instrumentation framework.
==8226== Copyright (C) 2000-2007, and GNU GPL'd, by Julian Seward et al.
==8226== For more details, rerun with: -v
==8226==
==8226== Conditional jump or move depends on uninitialised value(s)
==8226== at 0x80950BA: array_to_assign (in /bin/bash)
==8226== by 0x8095843: print_array_assignment (in /bin/bash)
==8226== by 0x8077EEB: print_assignment (in /bin/bash)
==8226== by 0x8077F7F: print_var_list (in /bin/bash)
==8226== by 0x80AE149: set_builtin (in /bin/bash)
==8226== by 0x806F399: (within /bin/bash)
==8226== by 0x8073070: (within /bin/bash)
==8226== by 0x8071552: execute_command_internal (in /bin/bash)
==8226== by 0x806FAD2: execute_command (in /bin/bash)
==8226== by 0x80709E1: (within /bin/bash)
==8226== by 0x80714BF: execute_command_internal (in /bin/bash)
==8226== by 0x80A7F4A: parse_and_execute (in /bin/bash)
==8226==
==8226== Conditional jump or move depends on uninitialised value(s)
==8226== at 0x80950C7: array_to_assign (in /bin/bash)
==8226== by 0x8095843: print_array_assignment (in /bin/bash)
==8226== by 0x8077EEB: print_assignment (in /bin/bash)
==8226== by 0x8077F7F: print_var_list (in /bin/bash)
==8226== by 0x80AE149: set_builtin (in /bin/bash)
==8226== by 0x806F399: (within /bin/bash)
==8226== by 0x8073070: (within /bin/bash)
==8226== by 0x8071552: execute_command_internal (in /bin/bash)
==8226== by 0x806FAD2: execute_command (in /bin/bash)
==8226== by 0x80709E1: (within /bin/bash)
==8226== by 0x80714BF: execute_command_internal (in /bin/bash)
==8226== by 0x80A7F4A: parse_and_execute (in /bin/bash)
==8226==
==8226== Conditional jump or move depends on uninitialised value(s)
==8226== at 0x80950D4: array_to_assign (in /bin/bash)
==8226== by 0x8095843: print_array_assignment (in /bin/bash)
==8226== by 0x8077EEB: print_assignment (in /bin/bash)
==8226== by 0x8077F7F: print_var_list (in /bin/bash)
==8226== by 0x80AE149: set_builtin (in /bin/bash)
==8226== by 0x806F399: (within /bin/bash)
==8226== by 0x8073070: (within /bin/bash)
==8226== by 0x8071552: execute_command_internal (in /bin/bash)
==8226== by 0x806FAD2: execute_command (in /bin/bash)
==8226== by 0x80709E1: (within /bin/bash)
==8226== by 0x80714BF: execute_command_internal (in /bin/bash)
==8226== by 0x80A7F4A: parse_and_execute (in /bin/bash)
==8226==
==8226== Conditional jump or move depends on uninitialised value(s)
==8226== at 0x40239DB: strlen (mc_replace_strmem.c:242)
==8226== by 0x80951E0: array_to_assign (in /bin/bash)
==8226== by 0x8095843: print_array_assignment (in /bin/bash)
==8226== by 0x8077EEB: print_assignment (in /bin/bash)
==8226== by 0x8077F7F: print_var_list (in /bin/bash)
==8226== by 0x80AE149: set_builtin (in /bin/bash)
==8226== by 0x806F399: (within /bin/bash)
==8226== by 0x8073070: (within /bin/bash)
==8226== by 0x8071552: execute_command_internal (in /bin/bash)
==8226== by 0x806FAD2: execute_command (in /bin/bash)
==8226== by 0x80709E1: (within /bin/bash)
==8226== by 0x80714BF: execute_command_internal (in /bin/bash)
==8226==
==8226== Conditional jump or move depends on uninitialised value(s)
==8226== at 0x40239E7: strlen (mc_replace_strmem.c:242)
==8226== by 0x80951E0: array_to_assign (in /bin/bash)
==8226== by 0x8095843: print_array_assignment (in /bin/bash)
==8226== by 0x8077EEB: print_assignment (in /bin/bash)
==8226== by 0x8077F7F: print_var_list (in /bin/bash)
==8226== by 0x80AE149: set_builtin (in /bin/bash)
==8226== by 0x806F399: (within /bin/bash)
==8226== by 0x8073070: (within /bin/bash)
==8226== by 0x8071552: execute_command_internal (in /bin/bash)
==8226== by 0x806FAD2: execute_command (in /bin/bash)
==8226== by 0x80709E1: (within /bin/bash)
==8226== by 0x80714BF: execute_command_internal (in /bin/bash)
==8226==
==8226== ERROR SUMMARY: 60 errors from 5 contexts (suppressed: 15 from 1)
==8226== malloc/free: in use at exit: 0 bytes in 0 blocks.
==8226== malloc/free: 0 allocs, 0 frees, 0 bytes allocated.
==8226== For counts of detected errors, rerun with: -v
==8226== All heap blocks were freed -- no leaks are possible.

ProblemType: Bug
Architecture: i386
Date: Sun Mar 16 15:32:42 2008
DistroRelease: Ubuntu 8.04
Package: bash 3.2-0hostname14
PackageArchitecture: i386
SourcePackage: bash
Uname: Linux 2.6.24-11-generic i686

[tomward (tomwardathome)]

This problem occurs in 9.04 as well with at least true, grep and xpdf, may occur with all programs.
This did not ocurr in 8.10

tt2tjw@shed:/projects$ valgrind true
==10513== Memcheck, a memory error detector.
==10513== Copyright (C) 2002-2007, and GNU GPL'd, by Julian Seward et al.
==10513== Using LibVEX rev 1854, a library for dynamic binary translation.
==10513== Copyright (C) 2004-2007, and GNU GPL'd, by OpenWorks LLP.
==10513== Using valgrind-3.3.1-Debian, a dynamic binary instrumentation framework.
==10513== Copyright (C) 2000-2007, and GNU GPL'd, by Julian Seward et al.
==10513== For more details, rerun with: -v
==10513==
==10513== Conditional jump or move depends on uninitialised value(s)
==10513== at 0x4018227: strlen (in /lib/ld-2.9.so)
==10513== by 0x40054B2: fillin_rpath (in /lib/ld-2.9.so)
==10513== by 0x4006FB8: _dl_init_paths (in /lib/ld-2.9.so)
==10513== by 0x40034B9: dl_main (in /lib/ld-2.9.so)
==10513== by 0x4016364: _dl_sysdep_start (in /lib/ld-2.9.so)
==10513== by 0x40013E1: _dl_start (in /lib/ld-2.9.so)
==10513== by 0x4000A97: (within /lib/ld-2.9.so)
==10513== by 0x0: ???
==10513== by 0x7FEFFFA8A: ???
==10513==
==10513== Conditional jump or move depends on uninitialised value(s)
==10513== at 0x4017FEE: index (in /lib/ld-2.9.so)
==10513== by 0x400694A: expand_dynamic_string_token (in /lib/ld-2.9.so)
==10513== by 0x4008B83: _dl_map_object (in /lib/ld-2.9.so)
==10513== by 0x400184A: map_doit (in /lib/ld-2.9.so)
==10513== by 0x400E8C5: _dl_catch_error (in /lib/ld-2.9.so)
==10513== by 0x400174E: do_preload (in /lib/ld-2.9.so)
==10513== by 0x400507D: dl_main (in /lib/ld-2.9.so)
==10513== by 0x4016364: _dl_sysdep_start (in /lib/ld-2.9.so)
==10513== by 0x40013E1: _dl_start (in /lib/ld-2.9.so)
==10513== by 0x4000A97: (within /lib/ld-2.9.so)
==10513== by 0x0: ???
==10513== by 0x7FEFFFA8A: ???
==10513==
==10513== Conditional jump or move depends on uninitialised value(s)
==10513== at 0x4017FF9: index (in /lib/ld-2.9.so)
==10513== by 0x400694A: expand_dynamic_string_token (in /lib/ld-2.9.so)
==10513== by 0x4008B83: _dl_map_object (in /lib/ld-2.9.so)
==10513== by 0x400184A: map_doit (in /lib/ld-2.9.so)
==10513== by 0x400E8C5: _dl_catch_error (in /lib/ld-2.9.so)
==10513== by 0x400174E: do_preload (in /lib/ld-2.9.so)
==10513== by 0x400507D: dl_main (in /lib/ld-2.9.so)
==10513== by 0x4016364: _dl_sysdep_start (in /lib/ld-2.9.so)
==10513== by 0x40013E1: _dl_start (in /lib/ld-2.9.so)
==10513== by 0x4000A97: (within /lib/ld-2.9.so)
==10513== by 0x0: ???
==10513== by 0x7FEFFFA8A: ???
==10513==
==10513== Conditional jump or move depends on uninitialised value(s)
==10513== at 0x4018004: index (in /lib/ld-2.9.so)
==10513== by 0x400694A: expand_dynamic_string_token (in /lib/ld-2.9.so)
==10513== by 0x4008B83: _dl_map_object (in /lib/ld-2.9.so)
==10513== by 0x400184A: map_doit (in /lib/ld-2.9.so)
==10513== by 0x400E8C5: _dl_catch_error (in /lib/ld-2.9.so)
==10513== by 0x400174E: do_preload (in /lib/ld-2.9.so)
==10513== by 0x400507D: dl_main (in /lib/ld-2.9.so)
==10513== by 0x4016364: _dl_sysdep_start (in /lib/ld-2.9.so)
==...

[Matthias Klose (doko)]

not seen anymore with bash-4.0 in karmic (although you see glibc-2.10 related diagnostics which should go away with an update to valgrind-3.5).