In libshouldbeinlibc/timespec.c, fmt_minutes, fmt_seconds, and fmt_past_time do not modify their BUF output parameter if TV->tv_sec is 0, and precision is also 0.  The return value of fmt_* is set appropriately to 0 in this case.  The callers of these functions are in libps/spec.c: ps_emit_seconds, ps_emit_minutes, and ps_emit_past_time do not check the return value properly before passing on the buf parameter in ps_stream_write_field.

callers of ps_emit_seconds, ps_emit_minutes, and ps_emit_past_time don't seem to be ever use a precision of 0, but these functions should check the return values of fmt_seconds, fmt_minutes, fmt_past_time, to be complete.  By fixing this, libps would become a little bit more robust.

This bug report comes as a result of code-staring audit and not debugging a particular bug in gdb.