제출 #586922: radare2 radiff2 5.9.9 and master branch Memory corruption

Summary
Segmentation Fault in radiff2 Tool Caused by Write Access to Zero Page

Environment
radare2 version: 5.9.9 and master branch
Commit: git.5.9.9
Build options: gpl release -O1 cs:5 cl:2 make
Operating System: Ubuntu 22.04 x86_64
Architecture: x86_64
Steps to reproduce
export CFLAGS="-g -O0 -fno-inline -fno-lto -fsanitize=address"
export CXXFLAGS="-g -O0 -fno-inline -fno-lto -fsanitize=address"
./configure --without-qjs
make -j64 & make install

root@46b925a575de:# ./radiff2 -AA -b 64 -B 0x8048000 -c px -d -e asm.bits=32 -g 0x1000,0x2000 -n -t 90 -T -u -U -V POC1 POC2
AddressSanitizer:DEADLYSIGNAL

=================================================================
==1707299==ERROR: AddressSanitizer: SEGV on unknown address 0x000000000058 (pc 0x7f420429b557 bp 0x604000004d50 sp 0x7f41fd4f27c0 T2)
==1707299==The signal is caused by a WRITE memory access.
==1707299==Hint: address points to the zero page.
#0 0x7f420429b557 in __cons_pal_update_event /root/this-program/radare2-dfe3eea/libr/cons/pal.c:153
#1 0x7f420429b2ad in r_cons_pal_init /root/this-program/radare2-dfe3eea/libr/cons/pal.c:263
#2 0x7f420426ee11 in init_cons_context /root/this-program/radare2-dfe3eea/libr/cons/cons.c:166
#3 0x7f420426cecc in r_cons_new /root/this-program/radare2-dfe3eea/libr/cons/cons.c:684
#4 0x7f4203928612 in r_core_init /root/this-program/radare2-dfe3eea/libr/core/core.c:2618
#5 0x7f42039281d8 in r_core_new /root/this-program/radare2-dfe3eea/libr/core/core.c:386
#6 0x7f4200e96d06 in opencore /root/this-program/radare2-dfe3eea/libr/main/radiff2.c:78
#7 0x7f4200e96cac in thready_core /root/this-program/radare2-dfe3eea/libr/main/radiff2.c:1313
#8 0x7f4203f5b038 in _r_th_launcher /root/this-program/radare2-dfe3eea/libr/util/thread.c:53
#9 0x7f4200cc0ac2 in start_thread nptl/pthread_create.c:442
#10 0x7f4200d5284f (/lib/x86_64-linux-gnu/libc.so.6+0x12684f)

AddressSanitizer can not provide additional info.
SUMMARY: AddressSanitizer: SEGV /root/this-program/radare2-dfe3eea/libr/cons/pal.c:153 in __cons_pal_update_event
Thread T2 created by T0 here:
INFO: Analyze all flags starting with sym. and entry0 (aa)
INFO: Analyze imports (af@@@i)
#0 0x7f4204639685 in __interceptor_pthread_create ../../../../src/libsanitizer/asan/asan_interceptors.cpp:216
#1 0x7f4203f5aea9 in r_th_new /root/this-program/radare2-dfe3eea/libr/util/thread.c:259

==1707299==ABORTING

POC
https://drive.google.com/file/d/1LVaraZB30lJXtrvp-4bcEJrZYFJb2bfc/view?usp=sharing

Credit
Xiaoguo Li (CUPL)
Xudong Cao (UCAS)

• 원천: ⚠️ https://github.com/radareorg/radare2/issues/24234
• 사용자: rootsec (UID 85929)
• 제출: 2025. 05. 29. PM 07:00 (1 년도 ago)
• 모더레이션: 2025. 06. 04. PM 02:17 (6 days later)
• 상태: 수락
• VulDB 항목: 311133 [Radare2 5.9.9 radiff2 /libr/cons/pal.c r_cons_pal_init -T 메모리 손상]
• 포인트들: 20