* [binutils-gdb] Re: stab nearest_line bfd_malloc_and_get_section
@ 2022-10-05 4:25 Alan Modra
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From: Alan Modra @ 2022-10-05 4:25 UTC (permalink / raw)
To: bfd-cvs
https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=011a13613403c42717c623b0c5fc1e69de9f65b5
commit 011a13613403c42717c623b0c5fc1e69de9f65b5
Author: Alan Modra <amodra@gmail.com>
Date: Wed Oct 5 10:27:46 2022 +1030
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:
---
bfd/syms.c | 4 ++++
1 file changed, 4 insertions(+)
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);
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2022-10-05 4:25 [binutils-gdb] Re: stab nearest_line bfd_malloc_and_get_section Alan Modra
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