From: Alan Modra <amodra@gmail.com>
Date: Sat, 4 Jan 2025 03:09:20 +0000 (+1030)
Subject: ELF sec_info memory leaks
X-Git-Tag: binutils-2_44~271
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=003ced705f6d4c10b7f0fb96acf7ec2db58f902e;p=thirdparty%2Fbinutils-gdb.git

ELF sec_info memory leaks

Use the bfd's objalloc memory so we don't need to free anything
attached to elf_section_data sec_info.  Other uses of sec_info that
need to allocate memory already use bfd_alloc.

	* elf-eh-frame.c (_bfd_elf_parse_eh_frame): bfd_alloc sec_info.
	* elf-sframe.c (_bfd_elf_parse_sframe): Likewise.
---

diff --git a/bfd/elf-eh-frame.c b/bfd/elf-eh-frame.c
index 9a43f1f6467..d903e27a676 100644
--- a/bfd/elf-eh-frame.c
+++ b/bfd/elf-eh-frame.c
@@ -655,9 +655,9 @@ _bfd_elf_parse_eh_frame (bfd *abfd, struct bfd_link_info *info,
       REQUIRE (skip_bytes (&buf, end, hdr_length - 4));
     }
 
-  sec_info = (struct eh_frame_sec_info *)
-      bfd_zmalloc (sizeof (struct eh_frame_sec_info)
-		   + (num_entries - 1) * sizeof (struct eh_cie_fde));
+  sec_info = bfd_zalloc (abfd,
+			 (sizeof (struct eh_frame_sec_info)
+			  + (num_entries - 1) * sizeof (struct eh_cie_fde)));
   REQUIRE (sec_info);
 
   /* We need to have a "struct cie" for each CIE in this section.  */
@@ -1050,7 +1050,6 @@ _bfd_elf_parse_eh_frame (bfd *abfd, struct bfd_link_info *info,
     (_("error in %pB(%pA); no .eh_frame_hdr table will be created"),
      abfd, sec);
   hdr_info->u.dwarf.table = false;
-  free (sec_info);
  success:
   _bfd_elf_munmap_section_contents (sec, ehbuf);
   free (local_cies);
diff --git a/bfd/elf-sframe.c b/bfd/elf-sframe.c
index 874d7c271e0..abc5c525f6f 100644
--- a/bfd/elf-sframe.c
+++ b/bfd/elf-sframe.c
@@ -214,7 +214,7 @@ _bfd_elf_parse_sframe (bfd *abfd,
   /* Decode the buffer and keep decoded contents for later use.
      Relocations are performed later, but are such that the section's
      size is unaffected.  */
-  sfd_info = bfd_malloc (sizeof (struct sframe_dec_info));
+  sfd_info = bfd_alloc (abfd, sizeof (*sfd_info));
   sf_size = sec->size;
 
   sfd_info->sfd_ctx = sframe_decode ((const char*)sfbuf, sf_size, &decerr);