[Bug binutils/22245] Potential UB in bfd_set_error

[cvs-commit at gcc dot gnu.org]

https://sourceware.org/bugzilla/show_bug.cgi?id=22245

--- Comment #3 from cvs-commit at gcc dot gnu.org <cvs-commit at gcc dot 
gnu.org> ---
The master branch has been updated by Alan Modra <address@hidden>:

https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=9ba5f27cdd15d22d6c5739ff5d2b1c81d796e114

commit 9ba5f27cdd15d22d6c5739ff5d2b1c81d796e114
Author: Pavel I. Kryukov <address@hidden>
Date:   Tue Oct 3 22:42:07 2017 +0300

    PR22245, Fix potential UB in bfd_set_error

    Passing enum as a first argument to variadic argument function
    may lead to undefined behavior. The explanation on CERT site:
    https://www.securecoding.cert.org/confluence/display/cplusplus/
    EXP58-CPP.+Pass+an+object+of+the+correct+type+to+va_start

    The bug was found by Kirill Nedostoev (address@hidden)
    when he tried to build GNU binutils with Clang 7.

        PR 22245
        * bfd.c (bfd_set_error): Avoid UB on passing arg to va_start that
        undergoes default promotion.
        * bfd-in2.h: Regenerate.

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