From: Alan Modra <amodra@gmail.com>
Date: Tue, 4 Oct 2022 23:57:46 +0000 (+1030)
Subject: Re: stab nearest_line bfd_malloc_and_get_section
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=011a13613403c42717c623b0c5fc1e69de9f65b5;p=binutils-gdb.git

Re: stab nearest_line bfd_malloc_and_get_section

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);