From: Alan Modra <amodra@gmail.com>
To: binutils@sourceware.org
Subject: asan: NULL dereference in som_set_reloc_info
Date: Sat, 13 Aug 2022 16:19:32 +0930 [thread overview]
Message-ID: <YvdJfHS9ie2NLy96@squeak.grove.modra.org> (raw)
* som.c (som_set_reloc_info): Ignore non-existent previous
fixup references.
diff --git a/bfd/som.c b/bfd/som.c
index d33ad67561a..c22f13b5a4c 100644
--- a/bfd/som.c
+++ b/bfd/som.c
@@ -4978,6 +4978,11 @@ som_set_reloc_info (unsigned char *fixup,
/* Handle a request for a previous fixup. */
if (*fp->format == 'P')
{
+ if (!reloc_queue[fp->D].reloc)
+ /* The back-reference doesn't exist. This is a broken
+ object file, likely fuzzed. Just ignore the fixup. */
+ continue;
+
/* Get pointer to the beginning of the prev fixup, move
the repeated fixup to the head of the queue. */
fixup = reloc_queue[fp->D].reloc;
--
Alan Modra
Australia Development Lab, IBM
reply other threads:[~2022-08-13 6:49 UTC|newest]
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