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create-diff-object: fix for unincluded sec->secsym

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When running kpatch-build with -d, I was getting a seg fault.  It was
faulting in kpatch_dump_kelf() when trying to print sec->secsym->name
for the .smp_locks section.  It turns out that the section was included
but its section symbol wasn't included, so sec->secsym pointed to freed
memory.
This commit is contained in:
Josh Poimboeuf 2014-07-08 08:06:46 -05:00
parent 6f38498d95
commit 4fefa662fd
1 changed files with 3 additions and 0 deletions
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3
kpatch-build/create-diff-object.c
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@ -1134,6 +1134,9 @@ void kpatch_migrate_included_elements(struct kpatch_elf *kelf, struct kpatch_elf
list_del(&sec->list);
list_add_tail(&sec->list, &out->sections);
sec->index = 0;
if (!is_rela_section(sec) && sec->secsym && !sec->secsym->include)
/* break link to non-included section symbol */
sec->secsym = NULL;
}
/* migrate included symbols from kelf to out */