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tools/patch: Add fedora patch for crashing git style patches

Browse source 
https://lists.gnu.org/archive/html/bug-patch/2018-10/msg00000.html

I assume a CVE number will be assigned soon.

Signed-off-by: Rosen Penev <rosenp@gmail.com>
This commit is contained in:
Rosen Penev 2018-10-31 16:55:14 -07:00 committed by Hauke Mehrtens
parent f9a408b75e
commit 32fc41baab
2 changed files with 54 additions and 1 deletions
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2
tools/patch/Makefile
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@ -8,7 +8,7 @@ include $(TOPDIR)/rules.mk
PKG_NAME:=patch
PKG_VERSION:=2.7.6
PKG_RELEASE:=3
PKG_RELEASE:=4
PKG_CPE_ID:=cpe:/a:gnu:patch
PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.xz

53
tools/patch/patches/040-Fix-error-handling-with-git-style-patches.patch Normal file
View file

@ -0,0 +1,53 @@
From 424da221cec76ea200cff1fa9b08a6f3d94c28a7 Mon Sep 17 00:00:00 2001
From: Lubomir Rintel <lkundrak@v3.sk>
Date: Wed, 31 Oct 2018 16:39:13 -0700
Subject: [PATCH] Fix error handling with git-style patches
When an error is encountered in output_files(), the subsequent call to
cleanup() calls back into output_files() resulting in an infinte recursion.
This is trivially reproduced with a git-style patch (which utilizes
output_file_later()) that tries to patch a nonexistent or unreadable
file (see attached test case).
* src/patch.c: (output_files) clear the files_to_output list before
iterating it, so that recursive calls won't iterate the same files.
---
src/patch.c | 12 ++++++++----
1 file changed, 8 insertions(+), 4 deletions(-)
--- a/src/patch.c
+++ b/src/patch.c
@@ -1938,8 +1938,12 @@ output_files (struct stat const *st)
{
gl_list_iterator_t iter;
const void *elt;
+ gl_list_t files;
- iter = gl_list_iterator (files_to_output);
+ files = files_to_output;
+ init_files_to_output ();
+
+ iter = gl_list_iterator (files);
while (gl_list_iterator_next (&iter, &elt, NULL))
{
const struct file_to_output *file_to_output = elt;
@@ -1957,8 +1961,8 @@ output_files (struct stat const *st)
/* Free the list up to here. */
for (;;)
{
- const void *elt2 = gl_list_get_at (files_to_output, 0);
- gl_list_remove_at (files_to_output, 0);
+ const void *elt2 = gl_list_get_at (files, 0);
+ gl_list_remove_at (files, 0);
if (elt == elt2)
break;
}
@@ -1967,7 +1971,7 @@ output_files (struct stat const *st)
}
}
gl_list_iterator_free (&iter);
- gl_list_clear (files_to_output);
+ gl_list_clear (files);
}
/* Fatal exit with cleanup. */