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ptrscan's Issues

Verification fails due to

Affected versions: v0.1.0+

Pointer chain verification fails because memory segments without backing files ('pathname' field in 'man 5 proc') derive their name from their starting address. Because of ASLR, across execution instances these names become invalid, leading to error in interpreting and verifying saved scans.

This bug was introduced in v0.1.0, which changed the names of backing files from '<NO_PATHNAME>' to their starting address, for regions which lack a backing file.

The solution is probably to treat such segments as belonging to the closest previous segment with a backing file. This approach will detect pointer chains where a pointer chain arrives to a segment that consistently follows some shared object.

make scan fail

OS - Ubuntu 23.10. CMake - 3.27.4. GNU - 13.2.0.

$ make scan
[  8%] Building CXX object CMakeFiles/scan.dir/ptrscan/main.cpp.o
[ 16%] Building CXX object CMakeFiles/scan.dir/ptrscan/args.cpp.o
[ 25%] Building CXX object CMakeFiles/scan.dir/ptrscan/proc_mem.cpp.o
[ 33%] Building CXX object CMakeFiles/scan.dir/ptrscan/ui_base.cpp.o
[ 41%] Building CXX object CMakeFiles/scan.dir/ptrscan/ui_term.cpp.o
[ 50%] Building CXX object CMakeFiles/scan.dir/ptrscan/debug.cpp.o
[ 58%] Building CXX object CMakeFiles/scan.dir/ptrscan/mem_tree.cpp.o
[ 66%] Building CXX object CMakeFiles/scan.dir/ptrscan/thread_ctrl.cpp.o
[ 75%] Building CXX object CMakeFiles/scan.dir/ptrscan/thread.cpp.o
[ 83%] Building CXX object CMakeFiles/scan.dir/ptrscan/serialise.cpp.o
[ 91%] Building CXX object CMakeFiles/scan.dir/ptrscan/verify.cpp.o
[100%] Linking CXX executable scan
/usr/bin/ld: CMakeFiles/scan.dir/ptrscan/proc_mem.cpp.o: in function `proc_mem::fetch_pid(args_struct*, ui_base*)':
/home/mexikanoz/Desktop/qtz/ptrscan/src/ptrscan/proc_mem.cpp:29:(.text+0x80): undefined reference to `new_name_pid'
/usr/bin/ld: /home/mexikanoz/Desktop/qtz/ptrscan/src/ptrscan/proc_mem.cpp:35:(.text+0xf7): undefined reference to `pid_by_name'
/usr/bin/ld: /home/mexikanoz/Desktop/qtz/ptrscan/src/ptrscan/proc_mem.cpp:50:(.text+0x20e): undefined reference to `del_name_pid'
/usr/bin/ld: CMakeFiles/scan.dir/ptrscan/proc_mem.cpp.o: in function `proc_mem::maps_init(maps_data*)':
/home/mexikanoz/Desktop/qtz/ptrscan/src/ptrscan/proc_mem.cpp:67:(.text+0x310): undefined reference to `new_maps_data'
/usr/bin/ld: /home/mexikanoz/Desktop/qtz/ptrscan/src/ptrscan/proc_mem.cpp:73:(.text+0x37c): undefined reference to `read_maps'
/usr/bin/ld: CMakeFiles/scan.dir/ptrscan/proc_mem.cpp.o: in function `proc_mem::populate_regions(args_struct*)':
/home/mexikanoz/Desktop/qtz/ptrscan/src/ptrscan/proc_mem.cpp:134:(.text+0x5de): undefined reference to `vector_get_ref'
/usr/bin/ld: CMakeFiles/scan.dir/ptrscan/proc_mem.cpp.o: in function `proc_mem::init_proc_mem(args_struct*, ui_base*)':
/home/mexikanoz/Desktop/qtz/ptrscan/src/ptrscan/proc_mem.cpp:181:(.text+0x846): undefined reference to `open_memory'
/usr/bin/ld: CMakeFiles/scan.dir/ptrscan/ui_base.cpp.o: in function `match_maps_obj(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, void*, maps_obj**)':
/home/mexikanoz/Desktop/qtz/ptrscan/src/ptrscan/ui_base.cpp:30:(.text+0x61): undefined reference to `vector_get_ref'
/usr/bin/ld: CMakeFiles/scan.dir/ptrscan/ui_term.cpp.o: in function `ui_term::clarify_pid(name_pid*)':
/home/mexikanoz/Desktop/qtz/ptrscan/src/ptrscan/ui_term.cpp:193:(.text+0xab): undefined reference to `vector_get_ref'
/usr/bin/ld: CMakeFiles/scan.dir/ptrscan/thread_ctrl.cpp.o: in function `thread_ctrl::init(args_struct*, proc_mem*, mem_tree*, ui_base*, int)':
/home/mexikanoz/Desktop/qtz/ptrscan/src/ptrscan/thread_ctrl.cpp:196:(.text+0x599): undefined reference to `open_memory'
/usr/bin/ld: CMakeFiles/scan.dir/ptrscan/thread_ctrl.cpp.o: in function `thread_ctrl::prepare_level(args_struct*, proc_mem*, mem_tree*)':
/home/mexikanoz/Desktop/qtz/ptrscan/src/ptrscan/thread_ctrl.cpp:279:(.text+0xa53): undefined reference to `get_region_by_addr'
/usr/bin/ld: CMakeFiles/scan.dir/ptrscan/serialise.cpp.o: in function `serialise::recurse_node(args_struct*, mem_node*, proc_mem*, unsigned int)':
/home/mexikanoz/Desktop/qtz/ptrscan/src/ptrscan/serialise.cpp:141:(.text+0x190): undefined reference to `vector_get_ref'
/usr/bin/ld: /home/mexikanoz/Desktop/qtz/ptrscan/src/ptrscan/serialise.cpp:146:(.text+0x204): undefined reference to `vector_get'
/usr/bin/ld: CMakeFiles/scan.dir/ptrscan/verify.cpp.o: in function `verify_chain(args_struct*, proc_mem*, ui_base*, serial_entry*, maps_obj*)':
/home/mexikanoz/Desktop/qtz/ptrscan/src/ptrscan/verify.cpp:37:(.text+0x70): undefined reference to `vector_get'
/usr/bin/ld: CMakeFiles/scan.dir/ptrscan/verify.cpp.o: in function `verify(args_struct*, proc_mem*, ui_base*, serialise*)':
/home/mexikanoz/Desktop/qtz/ptrscan/src/ptrscan/verify.cpp:104:(.text+0x3a8): undefined reference to `get_obj_by_basename'
collect2: error: ld returned 1 exit status
make[3]: *** [CMakeFiles/scan.dir/build.make:257: scan] Error 1
make[2]: *** [CMakeFiles/Makefile2:148: CMakeFiles/scan.dir/all] Error 2
make[1]: *** [CMakeFiles/Makefile2:155: CMakeFiles/scan.dir/rule] Error 2
make: *** [Makefile:137: scan] Error 2

thread -> get_next_buffer_smart: memory read into buffer failed.thread 

$ sudo ptrscan -a 0x10a4d750 -w first_map.pscan client
thread -> get_next_buffer_smart: memory read into buffer failed.thread -> get_next_buffer_smart: failsafe memory read into buffer failed.

Got all privileges; process is able to be proceed. I waited for couple of minutes after this error occured but nothing happened, so seems like EOL without shutdown. Any description on the error would be nice.

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