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asan: applying zero offset to NULL pointer

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* dwarf.c (fetch_indexed_string): Move initialisation of "curr"
	and "end" after checking for missing section.
This commit is contained in:
Alan Modra
2022-06-09 23:19:03 +09:30
parent 82cb252432
commit 22b8da0ae7
1 changed files with 3 additions and 2 deletions
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5
binutils/dwarf.c
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@ -700,8 +700,7 @@ fetch_indexed_string (dwarf_vma idx, struct cu_tu_set *this_set,
dwarf_vma index_offset;
dwarf_vma str_offset;
const char * ret;
unsigned char *curr = index_section->start;
unsigned char *end = curr + index_section->size;
unsigned char *curr, *end;
dwarf_vma length;
if (index_section->start == NULL)
@ -712,6 +711,8 @@ fetch_indexed_string (dwarf_vma idx, struct cu_tu_set *this_set,
return (dwo ? _("<no .debug_str.dwo section>")
: _("<no .debug_str section>"));
curr = index_section->start;
end = curr + index_section->size;
/* FIXME: We should cache the length... */
SAFE_BYTE_GET_AND_INC (length, curr, 4, end);
if (length == 0xffffffff)