tree a0c9cd162960f857fd5a016205d53dd6100a96c0
parent c3a6a9dfc6ed0c24ab2d11b2d71f425b479575c9
author Mark Wielaard <mark@klomp.org> 1634560520 +0200
committer Mark Wielaard <mark@klomp.org> 1634560533 +0200

libdw: Don't pass NULL to dwarf_peel_type

commit c3a6a9dfc "libdw: Use signedness of subrange type to
determine array bounds" introduced a type check on a DIE which
exposed a latent bug in the get_type function. Even if the type
of a DIE couldn't be determined it would call dwarf_peel_type
on it. The gcc undefined sanitizer would flag this as being
undefined behaviour because the second argument of the function
is marked as non-NULL. Fix this by checking we actually have
a non-NULL type DIE.

Signed-off-by: Mark Wielaard <mark@klomp.org>