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asan: heap buffer overflow in _bfd_error_handler

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On coff_slurp_symbol_table printing "unrecognized storage class"
for a symbol error.  If the symbol name is the last string in its
section and not terminated, we run off the end of the buffer.

	* coffgen.c (build_debug_section): Terminate the section with
	an extra 0.
This commit is contained in:
Alan Modra
2022-08-06 19:54:46 +09:30
parent 431d48ef28
commit 45c8663b92
1 changed files with 2 additions and 1 deletions
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3
bfd/coffgen.c
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@ -1539,9 +1539,10 @@ build_debug_section (bfd *abfd, asection ** sect_return)
return NULL;
sec_size = sect->size;
debug_section = (char *) _bfd_alloc_and_read (abfd, sec_size, sec_size);
debug_section = (char *) _bfd_alloc_and_read (abfd, sec_size + 1, sec_size);
if (debug_section == NULL)
return NULL;
debug_section[sec_size] = 0;
if (bfd_seek (abfd, position, SEEK_SET) != 0)
return NULL;