https://sourceware.org/bugzilla/show_bug.cgi?id=28691
--- Comment #2 from cvs-commit at gcc dot gnu.org <cvs-commit at gcc dot gnu.org> --- The master branch has been updated by Alan Modra <amo...@sourceware.org>: https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=161cdabc3927b144ffcff9bf7b1daf5fe32a193c commit 161cdabc3927b144ffcff9bf7b1daf5fe32a193c Author: Alan Modra <amo...@gmail.com> Date: Wed Dec 15 15:06:26 2021 +1030 PR28691, validate dwarf attribute form PR28691 is a fuzzing PR that triggers a non-problem of "output changes per run" with PIEs and/or different compilers. I've closed similar PRs before as wontfix, but I guess there will be no end of this type of PR. The trigger is an attribute that usually takes one of the offset/constant reference DW_FORMs being given an indexed string DW_FORM. The bfd reader doesn't support indexed strings and returns an error string instead. The address of the string varies with PIE runs and/or compiler, and we allow that address to appear in output. Fix this by validating integer attribute forms, as we do for string form attributes. PR 28691 * dwarf2.c (is_str_attr): Rename to.. (is_str_form): ..this. Change param type. Update calls. (is_int_form): New function. (read_attribute_value): Handle DW_FORM_addrx2. (find_abstract_instance): Validate form when using attr.u.val. (scan_unit_for_symbols, parse_comp_unit): Likewise. -- You are receiving this mail because: You are on the CC list for the bug.
