https://sourceware.org/bugzilla/show_bug.cgi?id=21416
Bug ID: 21416
Summary: readelf segfault - null pointer dereferencing
Product: binutils
Version: 2.28
Status: UNCONFIRMED
Severity: normal
Priority: P2
Component: binutils
Assignee: unassigned at sourceware dot org
Reporter: dungnguy at comp dot nus.edu.sg
Target Milestone: ---
Created attachment 10013
--> https://sourceware.org/bugzilla/attachment.cgi?id=10013&action=edit
Crashing input
Dear All,
This bug was found with AFLGo, a directed version of AFL/AFLFast. Thanks also
to Marcel Böhme and Van-Thuan Pham.
This bug was found on Ubuntu 14.04 64-bit & binutils was checked out from main
repository at git://sourceware.org/git/binutils-gdb.git. Its commit is
a6c21d4a553de184562fd8409a5bcd3f2cc2561a (Wed Apr 19 13:16:05 2017).
binutils was built with ASAN using gcc-6.2 and clang-3.4. The configure command
was:
CC=clang CFLAGS="-DFORTIFY_SOURCE=2 -fstack-protector-all
-fsanitize=undefined,address -fno-omit-frame-pointer -g -Wno-error"
../configure --disable-shared --disable-gdb --disable-libdecnumber
--disable-readline --disable-sim
To reproduce:
Download the attached file - bug_14
readelf -wL bug_14
ASAN says:
==148446==ERROR: AddressSanitizer: SEGV on unknown address 0x000000000000 (pc
0x000000762d96 bp 0x7ffc66657190 sp 0x7ffc66655580 T0)
#0 0x762d95 in display_debug_lines_decoded
/home/ubuntu/binutils-analysis/binutils-gdb/obj-asan/binutils/../../binutils/dwarf.c:3813:8
#1 0x6c20a1 in display_debug_lines
/home/ubuntu/binutils-analysis/binutils-gdb/obj-asan/binutils/../../binutils/dwarf.c:4195:21
#2 0x5ae843 in display_debug_section
/home/ubuntu/binutils-analysis/binutils-gdb/obj-asan/binutils/../../binutils/readelf.c:13299:16
#3 0x51ede8 in process_section_contents
/home/ubuntu/binutils-analysis/binutils-gdb/obj-asan/binutils/../../binutils/readelf.c:13385:10
#4 0x4c99cb in process_object
/home/ubuntu/binutils-analysis/binutils-gdb/obj-asan/binutils/../../binutils/readelf.c:17682:9
#5 0x4c46f0 in process_file
/home/ubuntu/binutils-analysis/binutils-gdb/obj-asan/binutils/../../binutils/readelf.c:18074:13
#6 0x4c258a in main
/home/ubuntu/binutils-analysis/binutils-gdb/obj-asan/binutils/../../binutils/readelf.c:18146:11
#7 0x7f5ab05c4f44 in __libc_start_main
/build/eglibc-oGUzwX/eglibc-2.19/csu/libc-start.c:287
#8 0x4bae9c in _start
(/home/ubuntu/binutils-analysis/binutils-gdb/obj-asan/binutils/readelf+0x4bae9c)
VALGRIND says:
==148448== Invalid read of size 8
==148448== at 0x44686A: display_debug_lines_decoded (dwarf.c:3813)
==148448== by 0x4479CF: display_debug_lines (dwarf.c:4195)
==148448== by 0x42D4D3: display_debug_section (readelf.c:13299)
==148448== by 0x42D7BF: process_section_contents (readelf.c:13385)
==148448== by 0x437F14: process_object (readelf.c:17682)
==148448== by 0x438E37: process_file (readelf.c:18074)
==148448== by 0x438FDF: main (readelf.c:18146)
==148448== Address 0x0 is not stack'd, malloc'd or (recently) free'd
==148448==
==148448==
==148448== Process terminating with default action of signal 11 (SIGSEGV)
==148448== Access not within mapped region at address 0x0
==148448== at 0x44686A: display_debug_lines_decoded (dwarf.c:3813)
==148448== by 0x4479CF: display_debug_lines (dwarf.c:4195)
==148448== by 0x42D4D3: display_debug_section (readelf.c:13299)
==148448== by 0x42D7BF: process_section_contents (readelf.c:13385)
==148448== by 0x437F14: process_object (readelf.c:17682)
==148448== by 0x438E37: process_file (readelf.c:18074)
==148448== by 0x438FDF: main (readelf.c:18146)
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