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From e51fdff7d2e538c0e5accdd65649ac68e6e0ddd4 Mon Sep 17 00:00:00 2001
From: Alan Modra <amodra@gmail.com>
Date: Wed, 19 Feb 2025 22:45:29 +1030
Subject: [PATCH] binutils/dwarf.c debug_information leak
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.
CVE: CVE-2025-8225
Upstream-Status: Backport [https://gitlab.com/gnutools/binutils-gdb/-/commit/e51fdff7d2e538c0e5accdd65649ac68e6e0ddd4]
Signed-off-by: Peter Marko <peter.marko@siemens.com>
---
binutils/dwarf.c | 8 +++-----
1 file changed, 3 insertions(+), 5 deletions(-)
diff --git a/binutils/dwarf.c b/binutils/dwarf.c
index 8e004cea839..bfbf83ec9f4 100644
--- a/binutils/dwarf.c
+++ b/binutils/dwarf.c
@@ -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"),
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