Backport of: From 0736b7c1e7cf4232c5d7eb2b0fbfe9be81bd3baa Mon Sep 17 00:00:00 2001 From: Philip Withnall Date: Thu, 4 Feb 2021 13:41:21 +0000 Subject: [PATCH 04/11] glib: Use g_memdup2() instead of g_memdup() in obvious places MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Convert all the call sites which use `g_memdup()`’s length argument trivially (for example, by passing a `sizeof()` or an existing `gsize` variable), so that they use `g_memdup2()` instead. In almost all of these cases the use of `g_memdup()` would not have caused problems, but it will soon be deprecated, so best port away from it In particular, this fixes an overflow within `g_bytes_new()`, identified as GHSL-2021-045 by GHSL team member Kevin Backhouse. Signed-off-by: Philip Withnall Fixes: GHSL-2021-045 Helps: #2319 Upstream-Status: Backport [https://mirrors.ocf.berkeley.edu/ubuntu/pool/main/g/glib2.0/glib2.0_2.64.6-1~ubuntu20.04.3.debian.tar.xz] CVE: CVE-2021-27219 Signed-off-by: Neetika Singh Signed-off-by: Ranjitsinh Rathod --- glib/gbytes.c | 6 ++++-- glib/gdir.c | 3 ++- glib/ghash.c | 7 ++++--- glib/giochannel.c | 5 +++-- glib/gslice.c | 3 ++- glib/gtestutils.c | 3 ++- glib/gvariant.c | 7 ++++--- glib/gvarianttype.c | 3 ++- glib/tests/array-test.c | 4 +++- glib/tests/option-context.c | 6 ++++-- glib/tests/uri.c | 8 +++++--- 11 files changed, 35 insertions(+), 20 deletions(-) --- a/glib/gbytes.c +++ b/glib/gbytes.c @@ -34,6 +34,8 @@ #include +#include "gstrfuncsprivate.h" + /** * GBytes: * @@ -95,7 +97,7 @@ g_bytes_new (gconstpointer data, { g_return_val_if_fail (data != NULL || size == 0, NULL); - return g_bytes_new_take (g_memdup (data, size), size); + return g_bytes_new_take (g_memdup2 (data, size), size); } /** @@ -499,7 +501,7 @@ g_bytes_unref_to_data (GBytes *bytes, * Copy: Non g_malloc (or compatible) allocator, or static memory, * so we have to copy, and then unref. */ - result = g_memdup (bytes->data, bytes->size); + result = g_memdup2 (bytes->data, bytes->size); *size = bytes->size; g_bytes_unref (bytes); } --- a/glib/gdir.c +++ b/glib/gdir.c @@ -37,6 +37,7 @@ #include "gconvert.h" #include "gfileutils.h" #include "gstrfuncs.h" +#include "gstrfuncsprivate.h" #include "gtestutils.h" #include "glibintl.h" @@ -112,7 +113,7 @@ g_dir_open_with_errno (const gchar *path return NULL; #endif - return g_memdup (&dir, sizeof dir); + return g_memdup2 (&dir, sizeof dir); } /** --- a/glib/ghash.c +++ b/glib/ghash.c @@ -34,6 +34,7 @@ #include "gmacros.h" #include "glib-private.h" #include "gstrfuncs.h" +#include "gstrfuncsprivate.h" #include "gatomic.h" #include "gtestutils.h" #include "gslice.h" @@ -962,7 +963,7 @@ g_hash_table_ensure_keyval_fits (GHashTa if (hash_table->have_big_keys) { if (key != value) - hash_table->values = g_memdup (hash_table->keys, sizeof (gpointer) * hash_table->size); + hash_table->values = g_memdup2 (hash_table->keys, sizeof (gpointer) * hash_table->size); /* Keys and values are both big now, so no need for further checks */ return; } @@ -970,7 +971,7 @@ g_hash_table_ensure_keyval_fits (GHashTa { if (key != value) { - hash_table->values = g_memdup (hash_table->keys, sizeof (guint) * hash_table->size); + hash_table->values = g_memdup2 (hash_table->keys, sizeof (guint) * hash_table->size); is_a_set = FALSE; } } @@ -998,7 +999,7 @@ g_hash_table_ensure_keyval_fits (GHashTa /* Just split if necessary */ if (is_a_set && key != value) - hash_table->values = g_memdup (hash_table->keys, sizeof (gpointer) * hash_table->size); + hash_table->values = g_memdup2 (hash_table->keys, sizeof (gpointer) * hash_table->size); #endif } --- a/glib/giochannel.c +++ b/glib/giochannel.c @@ -35,7 +35,7 @@ #include #include "giochannel.h" - +#include "gstrfuncsprivate.h" #include "gstrfuncs.h" #include "gtestutils.h" #include "glibintl.h" @@ -1673,10 +1674,10 @@ g_io_channel_read_line (GIOChannel *cha /* Copy the read bytes (including any embedded nuls) and nul-terminate. * `USE_BUF (channel)->str` is guaranteed to be nul-terminated as it’s a - * #GString, so it’s safe to call g_memdup() with +1 length to allocate + * #GString, so it’s safe to call g_memdup2() with +1 length to allocate * a nul-terminator. */ g_assert (USE_BUF (channel)); - line = g_memdup (USE_BUF (channel)->str, got_length + 1); + line = g_memdup2 (USE_BUF (channel)->str, got_length + 1); line[got_length] = '\0'; *str_return = g_steal_pointer (&line); g_string_erase (USE_BUF (channel), 0, got_length); --- a/glib/gslice.c +++ b/glib/gslice.c @@ -41,6 +41,7 @@ #include "gmain.h" #include "gmem.h" /* gslice.h */ #include "gstrfuncs.h" +#include "gstrfuncsprivate.h" #include "gutils.h" #include "gtrashstack.h" #include "gtestutils.h" @@ -350,7 +351,7 @@ g_slice_get_config_state (GSliceConfig c array[i++] = allocator->contention_counters[address]; array[i++] = allocator_get_magazine_threshold (allocator, address); *n_values = i; - return g_memdup (array, sizeof (array[0]) * *n_values); + return g_memdup2 (array, sizeof (array[0]) * *n_values); default: return NULL; } --- a/glib/gtestutils.c +++ b/glib/gtestutils.c @@ -49,6 +49,7 @@ #include "gpattern.h" #include "grand.h" #include "gstrfuncs.h" +#include "gstrfuncsprivate.h" #include "gtimer.h" #include "gslice.h" #include "gspawn.h" @@ -3803,7 +3804,7 @@ g_test_log_extract (GTestLogBuffer *tbuf if (p <= tbuffer->data->str + mlength) { g_string_erase (tbuffer->data, 0, mlength); - tbuffer->msgs = g_slist_prepend (tbuffer->msgs, g_memdup (&msg, sizeof (msg))); + tbuffer->msgs = g_slist_prepend (tbuffer->msgs, g_memdup2 (&msg, sizeof (msg))); return TRUE; } --- a/glib/gvariant.c +++ b/glib/gvariant.c @@ -33,6 +33,7 @@ #include +#include "gstrfuncsprivate.h" /** * SECTION:gvariant @@ -725,7 +726,7 @@ g_variant_new_variant (GVariant *value) g_variant_ref_sink (value); return g_variant_new_from_children (G_VARIANT_TYPE_VARIANT, - g_memdup (&value, sizeof value), + g_memdup2 (&value, sizeof value), 1, g_variant_is_trusted (value)); } @@ -1229,7 +1230,7 @@ g_variant_new_fixed_array (const GVarian return NULL; } - data = g_memdup (elements, n_elements * element_size); + data = g_memdup2 (elements, n_elements * element_size); value = g_variant_new_from_data (array_type, data, n_elements * element_size, FALSE, g_free, data); @@ -1908,7 +1909,7 @@ g_variant_dup_bytestring (GVariant *valu if (length) *length = size; - return g_memdup (original, size + 1); + return g_memdup2 (original, size + 1); } /** --- a/glib/gvarianttype.c +++ b/glib/gvarianttype.c @@ -28,6 +28,7 @@ #include +#include "gstrfuncsprivate.h" /** * SECTION:gvarianttype @@ -1181,7 +1182,7 @@ g_variant_type_new_tuple (const GVariant g_assert (offset < sizeof buffer); buffer[offset++] = ')'; - return (GVariantType *) g_memdup (buffer, offset); + return (GVariantType *) g_memdup2 (buffer, offset); } /** --- a/glib/tests/array-test.c +++ b/glib/tests/array-test.c @@ -29,6 +29,8 @@ #include #include "glib.h" +#include "gstrfuncsprivate.h" + /* Test data to be passed to any function which calls g_array_new(), providing * the parameters for that call. Most #GArray tests should be repeated for all * possible values of #ArrayTestData. */ @@ -1917,7 +1919,7 @@ byte_array_new_take (void) GByteArray *gbarray; guint8 *data; - data = g_memdup ("woooweeewow", 11); + data = g_memdup2 ("woooweeewow", 11); gbarray = g_byte_array_new_take (data, 11); g_assert (gbarray->data == data); g_assert_cmpuint (gbarray->len, ==, 11); --- a/glib/tests/option-context.c +++ b/glib/tests/option-context.c @@ -27,6 +27,8 @@ #include #include +#include "gstrfuncsprivate.h" + static GOptionEntry main_entries[] = { { "main-switch", 0, 0, G_OPTION_ARG_NONE, NULL, @@ -256,7 +258,7 @@ join_stringv (int argc, char **argv) static char ** copy_stringv (char **argv, int argc) { - return g_memdup (argv, sizeof (char *) * (argc + 1)); + return g_memdup2 (argv, sizeof (char *) * (argc + 1)); } static void @@ -2323,7 +2325,7 @@ test_group_parse (void) g_option_context_add_group (context, group); argv = split_string ("program --test arg1 -f arg2 --group-test arg3 --frob arg4 -z arg5", &argc); - orig_argv = g_memdup (argv, (argc + 1) * sizeof (char *)); + orig_argv = g_memdup2 (argv, (argc + 1) * sizeof (char *)); retval = g_option_context_parse (context, &argc, &argv, &error);