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initrd: accept a zero-byte prefix for BOOTIF

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The BOOTIF MAC address can be prefixed with a hardware address
type. Typically it is 01 (for ethernet), but the legacy network module
accepts (and strips) any byte value.

It seems wrong to take any address type without validation. In
addition to "01", also accept a zero type which, according to the
bugzilla below, is used in some configurations to mean "undefined".

While at it, also accept ':' as separator for the first byte.

https://bugzilla.redhat.com/show_bug.cgi?id=1904099
https://gitlab.freedesktop.org/NetworkManager/NetworkManager/-/merge_requests/713
This commit is contained in:
Beniamino Galvani 2020-12-23 14:21:21 +01:00
parent 584e8f92f5
commit 6069ef4b8b
2 changed files with 65 additions and 45 deletions
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21
src/initrd/nmi-cmdline-reader.c
View file

@ -1154,14 +1154,21 @@ nmi_cmdline_reader_parse(const char *sysfs_dir, const char *const *argv, char **
NMConnection * connection;
NMSettingWired *s_wired;
const char * bootif = bootif_val;
char prefix[4];
if (!nm_utils_hwaddr_valid(bootif, ETH_ALEN) && g_str_has_prefix(bootif, "01-")
&& nm_utils_hwaddr_valid(&bootif[3], ETH_ALEN)) {
/*
* BOOTIF MAC address can be prefixed with a hardware type identifier.
* "01" stays for "wired", no other are known.
*/
bootif += 3;
if (!nm_utils_hwaddr_valid(bootif, ETH_ALEN)) {
strncpy(prefix, bootif, 3);
prefix[3] = '\0';
if (NM_IN_STRSET(prefix, "01-", "01:", "00-", "00:")
&& nm_utils_hwaddr_valid(&bootif[3], ETH_ALEN)) {
/*
* BOOTIF MAC address can be prefixed with a hardware type identifier.
* "01" stays for "wired", "00" is also accepted as it means "undefined".
* No others are known.
*/
bootif += 3;
}
}
connection = reader_get_connection(reader, NULL, NM_SETTING_WIRED_SETTING_NAME, FALSE);

89
src/initrd/tests/test-cmdline-reader.c
View file

@ -1952,58 +1952,71 @@ static void
test_bootif_hwtype(void)
{
gs_unref_hashtable GHashTable *connections = NULL;
const char *const *ARGV = NM_MAKE_STRV("ip=eth0:dhcp", "BOOTIF=01-00-53-AB-cd-02-03");
const char *const *ARGV0 = NM_MAKE_STRV("ip=eth0:dhcp", "BOOTIF=01-00-53-AB-cd-02-03");
const char *const *ARGV1 = NM_MAKE_STRV("ip=eth0:dhcp", "BOOTIF=00-00-53-Ab-cD-02-03");
const char *const *ARGV[] = {ARGV0, ARGV1};
NMConnection * connection;
NMSettingWired * s_wired;
NMSettingIPConfig *s_ip4;
NMSettingIPConfig *s_ip6;
gs_free char * hostname = NULL;
guint i;
connections = nmi_cmdline_reader_parse(TEST_INITRD_DIR "/sysfs", ARGV, &hostname);
g_assert(connections);
g_assert_cmpint(g_hash_table_size(connections), ==, 2);
g_assert_cmpstr(hostname, ==, NULL);
for (i = 0; i < G_N_ELEMENTS(ARGV); i++) {
connections = nmi_cmdline_reader_parse(TEST_INITRD_DIR "/sysfs", ARGV[i], &hostname);
g_assert(connections);
g_assert_cmpint(g_hash_table_size(connections), ==, 2);
g_assert_cmpstr(hostname, ==, NULL);
connection = g_hash_table_lookup(connections, "eth0");
g_assert(connection);
nmtst_assert_connection_verifies_without_normalization(connection);
g_assert_cmpstr(nm_connection_get_id(connection), ==, "eth0");
connection = g_hash_table_lookup(connections, "eth0");
g_assert(connection);
nmtst_assert_connection_verifies_without_normalization(connection);
g_assert_cmpstr(nm_connection_get_id(connection), ==, "eth0");
s_wired = nm_connection_get_setting_wired(connection);
g_assert(!nm_setting_wired_get_mac_address(s_wired));
g_assert(s_wired);
s_wired = nm_connection_get_setting_wired(connection);
g_assert(!nm_setting_wired_get_mac_address(s_wired));
g_assert(s_wired);
s_ip4 = nm_connection_get_setting_ip4_config(connection);
g_assert(s_ip4);
g_assert_cmpstr(nm_setting_ip_config_get_method(s_ip4), ==, NM_SETTING_IP4_CONFIG_METHOD_AUTO);
g_assert(!nm_setting_ip_config_get_ignore_auto_dns(s_ip4));
g_assert(!nm_setting_ip_config_get_may_fail(s_ip4));
s_ip4 = nm_connection_get_setting_ip4_config(connection);
g_assert(s_ip4);
g_assert_cmpstr(nm_setting_ip_config_get_method(s_ip4),
==,
NM_SETTING_IP4_CONFIG_METHOD_AUTO);
g_assert(!nm_setting_ip_config_get_ignore_auto_dns(s_ip4));
g_assert(!nm_setting_ip_config_get_may_fail(s_ip4));
s_ip6 = nm_connection_get_setting_ip6_config(connection);
g_assert(s_ip6);
g_assert_cmpstr(nm_setting_ip_config_get_method(s_ip6), ==, NM_SETTING_IP6_CONFIG_METHOD_AUTO);
g_assert(!nm_setting_ip_config_get_ignore_auto_dns(s_ip6));
s_ip6 = nm_connection_get_setting_ip6_config(connection);
g_assert(s_ip6);
g_assert_cmpstr(nm_setting_ip_config_get_method(s_ip6),
==,
NM_SETTING_IP6_CONFIG_METHOD_AUTO);
g_assert(!nm_setting_ip_config_get_ignore_auto_dns(s_ip6));
connection = g_hash_table_lookup(connections, "bootif_connection");
g_assert(connection);
nmtst_assert_connection_verifies_without_normalization(connection);
g_assert_cmpstr(nm_connection_get_id(connection), ==, "BOOTIF Connection");
connection = g_hash_table_lookup(connections, "bootif_connection");
g_assert(connection);
nmtst_assert_connection_verifies_without_normalization(connection);
g_assert_cmpstr(nm_connection_get_id(connection), ==, "BOOTIF Connection");
s_wired = nm_connection_get_setting_wired(connection);
g_assert_cmpstr(nm_setting_wired_get_mac_address(s_wired), ==, "00:53:AB:CD:02:03");
g_assert(s_wired);
s_wired = nm_connection_get_setting_wired(connection);
g_assert_cmpstr(nm_setting_wired_get_mac_address(s_wired), ==, "00:53:AB:CD:02:03");
g_assert(s_wired);
s_ip4 = nm_connection_get_setting_ip4_config(connection);
g_assert(s_ip4);
g_assert_cmpstr(nm_setting_ip_config_get_method(s_ip4), ==, NM_SETTING_IP4_CONFIG_METHOD_AUTO);
g_assert(!nm_setting_ip_config_get_ignore_auto_dns(s_ip4));
g_assert(nm_setting_ip_config_get_may_fail(s_ip4));
s_ip4 = nm_connection_get_setting_ip4_config(connection);
g_assert(s_ip4);
g_assert_cmpstr(nm_setting_ip_config_get_method(s_ip4),
==,
NM_SETTING_IP4_CONFIG_METHOD_AUTO);
g_assert(!nm_setting_ip_config_get_ignore_auto_dns(s_ip4));
g_assert(nm_setting_ip_config_get_may_fail(s_ip4));
s_ip6 = nm_connection_get_setting_ip6_config(connection);
g_assert(s_ip6);
g_assert_cmpstr(nm_setting_ip_config_get_method(s_ip6), ==, NM_SETTING_IP6_CONFIG_METHOD_AUTO);
g_assert(!nm_setting_ip_config_get_ignore_auto_dns(s_ip6));
g_assert(nm_setting_ip_config_get_may_fail(s_ip6));
s_ip6 = nm_connection_get_setting_ip6_config(connection);
g_assert(s_ip6);
g_assert_cmpstr(nm_setting_ip_config_get_method(s_ip6),
==,
NM_SETTING_IP6_CONFIG_METHOD_AUTO);
g_assert(!nm_setting_ip_config_get_ignore_auto_dns(s_ip6));
g_assert(nm_setting_ip_config_get_may_fail(s_ip6));
}
}
/* Check that nameservers are assigned to all existing