diff mbox series

[kirkstone,22/26] relocate_sdk.py: ensure interpreter size error causes relocation to fail

Message ID 3f258378bcaebb9c42c0011c7c424c920ef71d22.1660876844.git.steve@sakoman.com
State Accepted, archived
Commit 3f258378bcaebb9c42c0011c7c424c920ef71d22
Headers show
Series [kirkstone,01/26] gdk-pixbuf: CVE-2021-46829 a heap-based buffer overflow | expand

Commit Message

Steve Sakoman Aug. 19, 2022, 2:42 a.m. UTC 
From: Paul Eggleton <paul.eggleton@microsoft.com>

If there is insufficent space to change the interpreter, we were
printing an error here but the overall script did not return an error
code, and thus the SDK installation appeared to succeed - but some of
the binaries will not be in a working state. Allow the relocation to
proceed (so we still get a full list of the failures) but error out at
the end so that the installation is halted.

Signed-off-by: Paul Eggleton <paul.eggleton@microsoft.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
(cherry picked from commit c5a9a448e462d3e5457e8403c5a1a54148ecd224)
Signed-off-by: Steve Sakoman <steve@sakoman.com>
---
 scripts/relocate_sdk.py | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)
diff mbox series

Patch

diff --git a/scripts/relocate_sdk.py b/scripts/relocate_sdk.py
index 4ed8bfc0d1..8a728720ba 100755
--- a/scripts/relocate_sdk.py
+++ b/scripts/relocate_sdk.py
@@ -104,11 +104,12 @@  def change_interpreter(elf_file_name):
             if (len(new_dl_path) >= p_filesz):
                 print("ERROR: could not relocate %s, interp size = %i and %i is needed." \
                     % (elf_file_name, p_memsz, len(new_dl_path) + 1))
-                break
+                return False
             dl_path = new_dl_path + b("\0") * (p_filesz - len(new_dl_path))
             f.seek(p_offset)
             f.write(dl_path)
             break
+    return True
 
 def change_dl_sysdirs(elf_file_name):
     if arch == 32:
@@ -222,6 +223,7 @@  else:
 
 executables_list = sys.argv[3:]
 
+errors = False
 for e in executables_list:
     perms = os.stat(e)[stat.ST_MODE]
     if os.access(e, os.W_OK|os.R_OK):
@@ -247,7 +249,8 @@  for e in executables_list:
         arch = get_arch()
         if arch:
             parse_elf_header()
-            change_interpreter(e)
+            if not change_interpreter(e):
+                errors = True
             change_dl_sysdirs(e)
 
     """ change permissions back """
@@ -260,3 +263,6 @@  for e in executables_list:
         print("New file size for %s is different. Looks like a relocation error!", e)
         sys.exit(-1)
 
+if errors:
+    print("Relocation of one or more executables failed.")
+    sys.exit(-1)