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From: Alan Modra <amodra@sourceware.org> To: bfd-cvs@sourceware.org Subject: [binutils-gdb] PR29482 - strip: heap-buffer-overflow Date: Sat, 13 Aug 2022 06:53:05 +0000 (GMT) [thread overview] Message-ID: <20220813065305.278BD3857B86@sourceware.org> (raw) https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=ef186fe54aa6d281a3ff8a9528417e5cc614c797 commit ef186fe54aa6d281a3ff8a9528417e5cc614c797 Author: Alan Modra <amodra@gmail.com> Date: Sat Aug 13 15:32:47 2022 +0930 PR29482 - strip: heap-buffer-overflow PR 29482 * coffcode.h (coff_set_section_contents): Sanity check _LIB. Diff: --- bfd/coffcode.h | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) diff --git a/bfd/coffcode.h b/bfd/coffcode.h index 67aaf158ca1..52027981c3f 100644 --- a/bfd/coffcode.h +++ b/bfd/coffcode.h @@ -4302,10 +4302,13 @@ coff_set_section_contents (bfd * abfd, rec = (bfd_byte *) location; recend = rec + count; - while (rec < recend) + while (recend - rec >= 4) { + size_t len = bfd_get_32 (abfd, rec); + if (len == 0 || len > (size_t) (recend - rec) / 4) + break; + rec += len * 4; ++section->lma; - rec += bfd_get_32 (abfd, rec) * 4; } BFD_ASSERT (rec == recend);
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