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Do not assume that the compressed XML data will be NUL terminated

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In most cases this is out of chance, but in some random cases the gzip
decompressor decides to reuse the input buffer as a decompression buffer,
which means we get junk data after the decompressed text.

To solve this, just truncate the data at the reported size, and then feed this
into the XML parser.

Fixes: https://github.com/hughsie/fwupd/issues/36
This commit is contained in:
Richard Hughes 2015-10-30 08:47:24 +00:00
parent f2fca01989
commit bb840ceaff
1 changed files with 4 additions and 3 deletions
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7
src/fu-main.c
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@ -701,6 +701,7 @@ fu_main_daemon_update_metadata (FuMainPrivate *priv, gint fd, gint fd_sig, GErro
guint i;
gsize size;
GPtrArray *apps;
g_autofree gchar *xml = NULL;
g_autoptr(AsStore) store = NULL;
g_autoptr(GBytes) bytes = NULL;
g_autoptr(GBytes) bytes_raw = NULL;
@ -764,9 +765,9 @@ fu_main_daemon_update_metadata (FuMainPrivate *priv, gint fd, gint fd_sig, GErro
/* load the store locally until we know it is valid */
store = as_store_new ();
if (!as_store_from_xml (store,
g_bytes_get_data (bytes, NULL),
NULL, error))
data = g_bytes_get_data (bytes, &size);
xml = g_strndup ((const gchar *) data, size);
if (!as_store_from_xml (store, xml, NULL, error))
return FALSE;
/* add the new application from the store */