Created attachment 178115 [details] A new file which should be added to /usr/ports/games/acm/files/ to add code to V/lib/InitAWin.c to zero w->csPool2 after malloc()ing w. games/acm may coredump immediately after starting on systems which do not zero malloc()ed memory. This is because one of the fields of a malloc()ed data structure (w) contains a pointer (w->csPool2), and if that pointer is never used, then later code will find the pointer is non-NULL and try to free() the memory pointed to by the pointer. The attached patch adds code to set the pointer to NULL after the initial malloc() call, so later code does not try to free() it.
A commit references this bug: Author: jbeich Date: Fri May 12 22:33:55 UTC 2017 New revision: 440736 URL: https://svnweb.freebsd.org/changeset/ports/440736 Log: games/acm: prevent free()ing unitialized data acm may coredump immediately after starting on systems which do not zero malloc()ed memory e.g., MALLOC_CONF=junk:true. This is because one of the fields of a malloc()ed data structure (w) contains a pointer (w->csPool2), and if that pointer is never used, then later code will find the pointer is non-NULL and try to free() the memory pointed to by the pointer. PR: 215427 Submitted by: Jeff Gibbons <jgibbons@protogate.com> Changes: head/games/acm/Makefile head/games/acm/files/patch-V_lib_InitAWin.c
A commit references this bug: Author: jbeich Date: Fri May 12 22:35:53 UTC 2017 New revision: 440737 URL: https://svnweb.freebsd.org/changeset/ports/440737 Log: MFH: r440736 games/acm: prevent free()ing unitialized data acm may coredump immediately after starting on systems which do not zero malloc()ed memory e.g., MALLOC_CONF=junk:true. This is because one of the fields of a malloc()ed data structure (w) contains a pointer (w->csPool2), and if that pointer is never used, then later code will find the pointer is non-NULL and try to free() the memory pointed to by the pointer. PR: 215427 Submitted by: Jeff Gibbons <jgibbons@protogate.com> Approved by: ports-secteam blanket Changes: _U branches/2017Q2/ branches/2017Q2/games/acm/Makefile branches/2017Q2/games/acm/files/patch-V_lib_InitAWin.c