https://sourceware.org/bugzilla/show_bug.cgi?id=24057
Bug ID: 24057
Summary: objdump memory leaks in xmalloc.c
Product: binutils
Version: 2.31
Status: UNCONFIRMED
Severity: normal
Priority: P2
Component: binutils
Assignee: unassigned at sourceware dot org
Reporter: 0x0keeper at gmail dot com
Target Milestone: ---
Created attachment 11508
--> https://sourceware.org/bugzilla/attachment.cgi?id=11508&action=edit
binutil-objdump-memory-leaks-xmalloc
hi,binutils team.i found there is memory leaks in xmalloc.c, when used objdump.
here is AddressSanitizer info.
./binutils/objdump -W poc
.........
==24202==ERROR: LeakSanitizer: detected memory leaks
Direct leak of 28672 byte(s) in 4 object(s) allocated from:
#0 0x4b9708 in malloc (/root/fuzz/binutils-2.31/binutils/objdump+0x4b9708)
#1 0x9b73cf in xrealloc
/root/fuzz/binutils-2.31/libiberty/./xmalloc.c:177:14
#2 0x50ae56 in read_and_display_attr
/root/fuzz/binutils-2.31/binutils/dwarf.c:2696:10
#3 0x50ae56 in process_debug_info
/root/fuzz/binutils-2.31/binutils/dwarf.c:3206
#4 0x5062cb in load_separate_debug_file
/root/fuzz/binutils-2.31/binutils/dwarf.c:9937:11
#5 0x4f2f45 in dump_dwarf
/root/fuzz/binutils-2.31/binutils/./objdump.c:2766:15
#6 0x4ee3be in display_object_bfd
/root/fuzz/binutils-2.31/binutils/./objdump.c:3688:7
#7 0x4ee3be in display_any_bfd
/root/fuzz/binutils-2.31/binutils/./objdump.c:3777
#8 0x4ed553 in display_file
/root/fuzz/binutils-2.31/binutils/./objdump.c:3798:3
#9 0x4ed553 in main /root/fuzz/binutils-2.31/binutils/./objdump.c:4100
#10 0x7fa9ab24b82f in __libc_start_main
/build/glibc-Cl5G7W/glibc-2.23/csu/../csu/libc-start.c:291
Direct leak of 408 byte(s) in 8 object(s) allocated from:
#0 0x4b9708 in malloc (/root/fuzz/binutils-2.31/binutils/objdump+0x4b9708)
#1 0x9b723a in xmalloc
/root/fuzz/binutils-2.31/libiberty/./xmalloc.c:147:12
#2 0x4f4a16 in dump_dwarf_section
/root/fuzz/binutils-2.31/binutils/./objdump.c:2694:6
Direct leak of 96 byte(s) in 1 object(s) allocated from:
#0 0x4b9708 in malloc (/root/fuzz/binutils-2.31/binutils/objdump+0x4b9708)
#1 0x9b723a in xmalloc
/root/fuzz/binutils-2.31/libiberty/./xmalloc.c:147:12
#2 0x5117c8 in display_debug_frames
/root/fuzz/binutils-2.31/binutils/dwarf.c:7497:12
#3 0x4f4a16 in dump_dwarf_section
/root/fuzz/binutils-2.31/binutils/./objdump.c:2694:6
Indirect leak of 204 byte(s) in 4 object(s) allocated from:
#0 0x4b9a88 in realloc (/root/fuzz/binutils-2.31/binutils/objdump+0x4b9a88)
#1 0x9b73aa in xrealloc
/root/fuzz/binutils-2.31/libiberty/./xmalloc.c:179:14
Indirect leak of 96 byte(s) in 1 object(s) allocated from:
#0 0x4b9708 in malloc (/root/fuzz/binutils-2.31/binutils/objdump+0x4b9708)
#1 0x9b723a in xmalloc
/root/fuzz/binutils-2.31/libiberty/./xmalloc.c:147:12
#2 0x5117c8 in display_debug_frames
/root/fuzz/binutils-2.31/binutils/dwarf.c:7497:12
#3 0x4f4a16 in dump_dwarf_section
/root/fuzz/binutils-2.31/binutils/./objdump.c:2694:6
SUMMARY: AddressSanitizer: 29476 byte(s) leaked in 18 allocation(s).
for example,source code in /binutils-2.31/libiberty/./xmalloc.c:177:14
https://github.com/bminor/binutils-gdb/blob/master/libiberty/xmalloc.c#L177
xrealloc (PTR oldmem, size_t size)
{
PTR newmem;
if (size == 0)
size = 1;
if (!oldmem)
newmem = malloc (size);
else
newmem = realloc (oldmem, size);
if (!newmem)
xmalloc_failed (size);
return (newmem);
}
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