maptool segfaults if memory slices > 32GB

[kazer]

I ran some tests on a server with a lot of RAM. When the memory slice is bigger than 32GB, maptool segfaults.

(gdb) r -M -k -S "36000000000" -u http://maps.navit-project.org/planet-36.bin -5 planet-36.bin.md5 -6 planet-36.bin < planet.o5m
Starting program: /navit/bin/navit/maptool/maptool -M -k -S "36000000000" -u http://maps.navit-project.org/planet-36.bin -5 planet-36.bin.md5 -6 planet-36.bin < planet.o5m
warning: Could not load shared library symbols for linux-vdso.so.1.
Do you need "set solib-search-path" or "set sysroot"?
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib64/libthread_db.so.1".
I will KEEP tmp files
PROGRESS: Phase 1: reading input data 0:00 0 MB

Program received signal SIGSEGV, Segmentation fault.
0x000000000041edf3 in node_item_find_index_in_ordered_list (id=200542) at /navit/navit/maptool/osm.c:1377
1377          if (node_buffer_base[node_count-1].id < id)
(gdb)
(gdb) bt
#0  0x000000000041edf3 in node_item_find_index_in_ordered_list (id=200542) at /navit/navit/maptool/osm.c:1377
#1  node_item_get (id=200542) at /navit/navit/maptool/osm.c:1426
#2  0x000000000041eea0 in node_ref_way (node=<optimized out>) at /navit/navit/maptool/osm.c:2904
#3  nodes_ref_item_bin (ib=ib@entry=0x6a5c80 <misc_item_buffer>) at /navit/navit/maptool/osm.c:2915
#4  0x0000000000421701 in osm_end_way (osm=0x7fffffffe550) at /navit/navit/maptool/osm.c:1743
#5  0x0000000000424c99 in map_collect_data_osm_o5m (in=<optimized out>, osm=osm@entry=0x7fffffffe550) at /navit/navit/maptool/osm_o5m.c:307
#6  0x0000000000418e07 in osm_read_input_data (p=0x7fffffffe4e0, suffix=<optimized out>) at /navit/navit/maptool/maptool.c:498
#7  main (argc=<optimized out>, argv=<optimized out>) at /navit/navit/maptool/maptool.c:888

[tryagain]

I think i know the reason, signed int32 count of nodes in buffer overflows and you get a pointer before array beginning.

Please verify if it works with >32gb slice an huge_slices.diff​ applied.

[kazer]

It works, good job tryagain!

[kazer]

Committed in r5890