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binutils/dwarf.c debug_information leak

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It is possible with fuzzed files to have num_debug_info_entries zero
after allocating space for debug_information, leading to multiple
allocations.

	* dwarf.c (process_debug_info): Don't test num_debug_info_entries
	to determine whether debug_information has been allocated,
	test alloc_num_debug_info_entries.
This commit is contained in:
Alan Modra
2025-02-19 22:45:29 +10:30
parent 1dd0c74551
commit e51fdff7d2
1 changed files with 3 additions and 5 deletions
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8
binutils/dwarf.c
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@@ -3807,13 +3807,11 @@ process_debug_info (struct dwarf_section * section,
}
if ((do_loc || do_debug_loc || do_debug_ranges || do_debug_info)
&& num_debug_info_entries == 0
&& ! do_types)
&& alloc_num_debug_info_entries == 0
&& !do_types)
{
/* Then allocate an array to hold the information. */
debug_information = (debug_info *) cmalloc (num_units,
sizeof (* debug_information));
debug_information = cmalloc (num_units, sizeof (*debug_information));
if (debug_information == NULL)
{
error (_("Not enough memory for a debug info array of %u entries\n"),