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Yet another ecoff fuzzed object fix

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* ecoff.c (_bfd_ecoff_slurp_symbol_table): Sanity check fdr_ptr
	csym against remaining space for symbols.  Error on out of bounds
	fdr_ptr fields.
This commit is contained in:
Alan Modra
2023-06-05 16:21:25 +09:30
parent 5b207b9194
commit 6fc018e9e5
1 changed files with 9 additions and 3 deletions
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12
bfd/ecoff.c
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@@ -956,13 +956,19 @@ _bfd_ecoff_slurp_symbol_table (bfd *abfd)
char *lraw_end;
HDRR *symhdr = &ecoff_data (abfd)->debug_info.symbolic_header;
if (fdr_ptr->csym == 0)
continue;
if (fdr_ptr->isymBase < 0
|| fdr_ptr->isymBase > symhdr->isymMax
|| fdr_ptr->csym <= 0
|| fdr_ptr->csym > symhdr->isymMax - fdr_ptr->isymBase
|| fdr_ptr->csym < 0
|| fdr_ptr->csym > ((long) bfd_get_symcount (abfd)
- (internal_ptr - internal))
|| fdr_ptr->issBase < 0
|| fdr_ptr->issBase > symhdr->issMax)
continue;
{
bfd_set_error (bfd_error_bad_value);
return false;
}
lraw_src = ((char *) ecoff_data (abfd)->debug_info.external_sym
+ fdr_ptr->isymBase * external_sym_size);
lraw_end = lraw_src + fdr_ptr->csym * external_sym_size;