ostree/0002-libarchive-Handle-archive_entry_symlink-returning-NU.patch

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From e5b45f861a4d5738679f37d46ebca6e171bb3212 Mon Sep 17 00:00:00 2001
From: Colin Walters <walters@verbum.org>
Date: Mon, 4 Apr 2022 10:25:35 -0400
Subject: [PATCH 2/6] libarchive: Handle `archive_entry_symlink()` returning
NULL
The `archive_entry_symlink()` API can definitely return `NULL`,
reading through the libarchive sources.
I hit this in the wild when using old ostree-ext to try to unpack
a chunked archive.
I didn't try to characterize this more, and sorry no unit test right
now.
---
src/libostree/ostree-repo-libarchive.c | 8 ++++++--
1 file changed, 6 insertions(+), 2 deletions(-)
diff --git a/src/libostree/ostree-repo-libarchive.c b/src/libostree/ostree-repo-libarchive.c
index 679aa44d..631c6d4b 100644
--- a/src/libostree/ostree-repo-libarchive.c
+++ b/src/libostree/ostree-repo-libarchive.c
@@ -146,8 +146,12 @@ file_info_from_archive_entry (struct archive_entry *entry)
g_autoptr(GFileInfo) info = _ostree_stbuf_to_gfileinfo (&stbuf);
if (S_ISLNK (stbuf.st_mode))
- g_file_info_set_attribute_byte_string (info, "standard::symlink-target",
- archive_entry_symlink (entry));
+ {
+ const char *target = archive_entry_symlink (entry);
+ if (target != NULL)
+ g_file_info_set_attribute_byte_string (info, "standard::symlink-target",
+ target);
+ }
return g_steal_pointer (&info);
}
--
2.31.1