From: Alan Modra <amodra@gmail.com>
To: binutils@sourceware.org
Subject: Re: stab nearest_line bfd_malloc_and_get_section
Date: Wed, 5 Oct 2022 14:52:24 +1030 [thread overview]
Message-ID: <Yz0GgH5t9eMTKAGA@squeak.grove.modra.org> (raw)
It didn't take long for the fuzzers to avoid size checks in
bfd_malloc_and_get_section. Plug this hole.
* syms.c (_bfd_stab_section_find_nearest_line): Ignore fuzzed
sections with no contents.
diff --git a/bfd/syms.c b/bfd/syms.c
index e8077f59bf0..c9d27ebe5d4 100644
--- a/bfd/syms.c
+++ b/bfd/syms.c
@@ -1019,6 +1019,10 @@ _bfd_stab_section_find_nearest_line (bfd *abfd,
return true;
}
+ if ((info->stabsec->flags & SEC_HAS_CONTENTS) == 0
+ || (info->strsec->flags & SEC_HAS_CONTENTS) == 0)
+ goto out;
+
stabsize = (info->stabsec->rawsize
? info->stabsec->rawsize
: info->stabsec->size);
--
Alan Modra
Australia Development Lab, IBM
next reply other threads:[~2022-10-05 4:22 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-10-05 4:22 Alan Modra [this message]
-- strict thread matches above, loose matches on Subject: below --
2022-09-26 5:23 Alan Modra
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