Public bug reported: Problem exists in 1.36+u20160616+dfsg1-1
It does not exist in 1.36+u20160122+dfsg1-1 It's not specific to the sv_fps variable. Others will cause it too. sv_fps is merely a very early one to cause a crash. It's a pointer to a structure. It goes from value NULL, to 0x5555561a1518 to 0x555500000015 to 0xffffffff00000015 to 0x100000015 and then crashes on deref later. (gdb) watch sv_fps Hardware watchpoint 1: sv_fps (gdb) r Starting program: ioquake3-1.36+u20160616+dfsg1/debian/ioquake3/usr/lib/ioquake3/ioquake3 ioquake3 +set com_basegame baseoa +set fs_basepath /usr/lib/openarena +set com_homepath .openarena +set com_legacyprotocol 71 +set com_protocol 71 +set sv_master1 dpmaster.deathmask.net +set cl_motd 0 Hardware watchpoint 1: sv_fps Old value = (cvar_t *) 0x0 New value = (cvar_t *) 0x5555561a1518 <cvar_indexes+2520> SV_Init () at code/server/sv_init.c:673 673 sv_timeout = Cvar_Get ("sv_timeout", "200", CVAR_TEMP ); (gdb) disp sv_fps 1: sv_fps = (cvar_t *) 0x5555561a1518 <cvar_indexes+2520> (gdb) c Continuing. Loading DLL file /usr/lib/openarena/baseoa/pak6-patch088/qagamex86_64.so instead. Loading DLL file: /usr/lib/openarena/baseoa/pak6-patch088/qagamex86_64.so Sys_LoadGameDll(/usr/lib/openarena/baseoa/pak6-patch088/qagamex86_64.so) found vmMain function at 0x7fffdce92314 ------- Game Initialization ------- gamename: baseoa gamedate: Jun 27 2016 tty] Thread 1 "ioquake3" hit Hardware watchpoint 1: sv_fps Old value = (cvar_t *) 0x5555561a1518 <cvar_indexes+2520> New value = (cvar_t *) 0x555500000015 Cvar_Register (vmCvar=0x555555d34a68 <sv_fps>, varName=0x7fffdcf12242 "sv_fps", defaultValue=0x7fffdcf12303 "20", flags=9) at code/qcommon/cvar.c:1346 1346 vmCvar->modificationCount = -1; 1: sv_fps = (cvar_t *) 0x555500000015 (gdb) n Thread 1 "ioquake3" hit Hardware watchpoint 1: sv_fps Old value = (cvar_t *) 0x555500000015 New value = (cvar_t *) 0xffffffff00000015 Cvar_Register (vmCvar=0x555555d34a68 <sv_fps>, varName=0x7fffdcf12242 "sv_fps", defaultValue=0x7fffdcf12303 "20", flags=9) at code/qcommon/cvar.c:1347 1347 Cvar_Update( vmCvar ); 1: sv_fps = (cvar_t *) 0xffffffff00000015 (gdb) n Thread 1 "ioquake3" hit Hardware watchpoint 1: sv_fps Old value = (cvar_t *) 0xffffffff00000015 New value = (cvar_t *) 0x100000015 Cvar_Update (vmCvar=0x555555d34a68 <sv_fps>) at code/qcommon/cvar.c:1375 1375 if ( strlen(cv->string)+1 > MAX_CVAR_VALUE_STRING ) 1: sv_fps = (cvar_t *) 0x100000015 (gdb) c Continuing. Thread 1 "ioquake3" received signal SIGSEGV, Segmentation fault. 0x00005555555d23ce in SV_Frame (msec=11) at code/server/sv_main.c:1082 1082 if ( sv_fps->integer < 1 ) { 1: sv_fps = (cvar_t *) 0x100000015 ** Affects: ioquake3 (Ubuntu) Importance: Undecided Status: New -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1653007 Title: yakkety ioquake3 SEGV in variable handling code To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ioquake3/+bug/1653007/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs