[Bug libgcc/104207] New: [12 Regression] Crash in _Unwind_Find_FDE if object lacks unwind information

[fw at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104207

            Bug ID: 104207
           Summary: [12 Regression] Crash in _Unwind_Find_FDE if object
                    lacks unwind information
           Product: gcc
           Version: 12.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: libgcc
          Assignee: unassigned at gcc dot gnu.org
          Reporter: fw at gcc dot gnu.org
  Target Milestone: ---
             Build: *-*-linux-gnu

r12-6210 lacks a NULL check for dlfo_eh_frame. This causes crashes when
unwinding through signal frames if the kernel vDSO has not been built with
debuginfo.