diff options
Diffstat (limited to 'gnu/packages/patches/glib-CVE-2021-27218.patch')
| -rw-r--r-- | gnu/packages/patches/glib-CVE-2021-27218.patch | 132 |
1 files changed, 132 insertions, 0 deletions
diff --git a/gnu/packages/patches/glib-CVE-2021-27218.patch b/gnu/packages/patches/glib-CVE-2021-27218.patch new file mode 100644 index 0000000000..00fa5ebf79 --- /dev/null +++ b/gnu/packages/patches/glib-CVE-2021-27218.patch @@ -0,0 +1,132 @@ +Backport of: + +From 0f384c88a241bbbd884487b1c40b7b75f1e638d3 Mon Sep 17 00:00:00 2001 +From: Krzesimir Nowak <qdlacz@gmail.com> +Date: Wed, 10 Feb 2021 23:51:07 +0100 +Subject: [PATCH] gbytearray: Do not accept too large byte arrays + +GByteArray uses guint for storing the length of the byte array, but it +also has a constructor (g_byte_array_new_take) that takes length as a +gsize. gsize may be larger than guint (64 bits for gsize vs 32 bits +for guint). It is possible to call the function with a value greater +than G_MAXUINT, which will result in silent length truncation. This +may happen as a result of unreffing GBytes into GByteArray, so rather +be loud about it. + +(Test case tweaked by Philip Withnall.) + +(Backport 2.66: Add #include gstrfuncsprivate.h in the test case for +`g_memdup2()`.) +--- + glib/garray.c | 6 ++++++ + glib/gbytes.c | 4 ++++ + glib/tests/bytes.c | 35 ++++++++++++++++++++++++++++++++++- + 3 files changed, 44 insertions(+), 1 deletion(-) + +diff --git a/glib/garray.c b/glib/garray.c +index 942e74c9f..fb1a42aaf 100644 +--- a/glib/garray.c ++++ b/glib/garray.c +@@ -2013,6 +2013,10 @@ g_byte_array_new (void) + * Create byte array containing the data. The data will be owned by the array + * and will be freed with g_free(), i.e. it could be allocated using g_strdup(). + * ++ * Do not use it if @len is greater than %G_MAXUINT. #GByteArray ++ * stores the length of its data in #guint, which may be shorter than ++ * #gsize. ++ * + * Since: 2.32 + * + * Returns: (transfer full): a new #GByteArray +@@ -2024,6 +2028,8 @@ g_byte_array_new_take (guint8 *data, + GByteArray *array; + GRealArray *real; + ++ g_return_val_if_fail (len <= G_MAXUINT, NULL); ++ + array = g_byte_array_new (); + real = (GRealArray *)array; + g_assert (real->data == NULL); +diff --git a/glib/gbytes.c b/glib/gbytes.c +index 7b72886e5..d56abe6c3 100644 +--- a/glib/gbytes.c ++++ b/glib/gbytes.c +@@ -519,6 +519,10 @@ g_bytes_unref_to_data (GBytes *bytes, + * g_bytes_new(), g_bytes_new_take() or g_byte_array_free_to_bytes(). In all + * other cases the data is copied. + * ++ * Do not use it if @bytes contains more than %G_MAXUINT ++ * bytes. #GByteArray stores the length of its data in #guint, which ++ * may be shorter than #gsize, that @bytes is using. ++ * + * Returns: (transfer full): a new mutable #GByteArray containing the same byte data + * + * Since: 2.32 +diff --git a/glib/tests/bytes.c b/glib/tests/bytes.c +index 5ea5c2b35..15a6aaad6 100644 +--- a/glib/tests/bytes.c ++++ b/glib/tests/bytes.c +@@ -10,12 +10,12 @@ + */ + + #undef G_DISABLE_ASSERT +-#undef G_LOG_DOMAIN + + #include <stdio.h> + #include <stdlib.h> + #include <string.h> + #include "glib.h" ++#include "glib/gstrfuncsprivate.h" + + /* Keep in sync with glib/gbytes.c */ + struct _GBytes +@@ -333,6 +333,38 @@ test_to_array_transferred (void) + g_byte_array_unref (array); + } + ++static void ++test_to_array_transferred_oversize (void) ++{ ++ g_test_message ("g_bytes_unref_to_array() can only take GBytes up to " ++ "G_MAXUINT in length; test that longer ones are rejected"); ++ ++ if (sizeof (guint) >= sizeof (gsize)) ++ { ++ g_test_skip ("Skipping test as guint is not smaller than gsize"); ++ } ++ else if (g_test_undefined ()) ++ { ++ GByteArray *array = NULL; ++ GBytes *bytes = NULL; ++ gpointer data = g_memdup2 (NYAN, N_NYAN); ++ gsize len = ((gsize) G_MAXUINT) + 1; ++ ++ bytes = g_bytes_new_take (data, len); ++ g_test_expect_message (G_LOG_DOMAIN, G_LOG_LEVEL_CRITICAL, ++ "g_byte_array_new_take: assertion 'len <= G_MAXUINT' failed"); ++ array = g_bytes_unref_to_array (g_steal_pointer (&bytes)); ++ g_test_assert_expected_messages (); ++ g_assert_null (array); ++ ++ g_free (data); ++ } ++ else ++ { ++ g_test_skip ("Skipping test as testing undefined behaviour is disabled"); ++ } ++} ++ + static void + test_to_array_two_refs (void) + { +@@ -410,6 +442,7 @@ main (int argc, char *argv[]) + g_test_add_func ("/bytes/to-array/transfered", test_to_array_transferred); + g_test_add_func ("/bytes/to-array/two-refs", test_to_array_two_refs); + g_test_add_func ("/bytes/to-array/non-malloc", test_to_array_non_malloc); ++ g_test_add_func ("/bytes/to-array/transferred/oversize", test_to_array_transferred_oversize); + g_test_add_func ("/bytes/null", test_null); + + return g_test_run (); +-- +2.30.1 + |