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