Re: [PATCH] wifi: mwifiex: fix parsing of more than two AKM suites

[kernel test robot <lkp@intel.com>]

Hi Sascha,

kernel test robot noticed the following build warnings:

[auto build test WARNING on wireless-next/main]
[also build test WARNING on wireless/main linus/master v6.9 next-20240523]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/Sascha-Hauer/wifi-mwifiex-fix-parsing-of-more-than-two-AKM-suites/20240523-161947
base:   https://git.kernel.org/pub/scm/linux/kernel/git/wireless/wireless-next.git main
patch link:    https://lore.kernel.org/r/20240523081428.2852276-1-s.hauer%40pengutronix.de
patch subject: [PATCH] wifi: mwifiex: fix parsing of more than two AKM suites
config: x86_64-randconfig-122-20240525 (https://download.01.org/0day-ci/archive/20240525/202405250631.g417GL0g-lkp@intel.com/config)
compiler: gcc-11 (Ubuntu 11.4.0-4ubuntu1) 11.4.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240525/202405250631.g417GL0g-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202405250631.g417GL0g-lkp@intel.com/

sparse warnings: (new ones prefixed by >>)
>> drivers/net/wireless/marvell/mwifiex/uap_cmd.c:54:17: sparse: sparse: cast to restricted __le16
   drivers/net/wireless/marvell/mwifiex/uap_cmd.c:72:17: sparse: sparse: cast to restricted __le16

vim +54 drivers/net/wireless/marvell/mwifiex/uap_cmd.c

    27	
    28	static void woal_check_rsn_ie(const struct IEEEtypes_Rsn_t *rsn_ie, int len,
    29				      struct mwifiex_uap_bss_param *bss_config, u8 *pairwise_cipher)
    30	{
    31		int left, count, i;
    32		struct wpa_suite_ucast *key_mgmt;
    33	
    34		left = len;
    35		if (left < (int)sizeof(struct IEEEtypes_Rsn_t))
    36			return;
    37	
    38		bss_config->wpa_cfg.group_cipher = 0;
    39		*pairwise_cipher = 0;
    40		bss_config->key_mgmt = 0;
    41	
    42		/* check the group cipher */
    43		switch (be32_to_cpu(rsn_ie->group_cipher)) {
    44		case WLAN_CIPHER_SUITE_TKIP:
    45			bss_config->wpa_cfg.group_cipher = CIPHER_TKIP;
    46			break;
    47		case WLAN_CIPHER_SUITE_CCMP:
    48			bss_config->wpa_cfg.group_cipher = CIPHER_AES_CCMP;
    49			break;
    50		default:
    51			break;
    52		}
    53	
  > 54		count = le16_to_cpu(rsn_ie->pairwise_cipher.count);
    55		for (i = 0; i < count; i++) {
    56			switch (be32_to_cpu(rsn_ie->pairwise_cipher.suite[i])) {
    57			case WLAN_CIPHER_SUITE_TKIP:
    58				*pairwise_cipher |= CIPHER_TKIP;
    59				break;
    60			case WLAN_CIPHER_SUITE_CCMP:
    61				*pairwise_cipher |= CIPHER_AES_CCMP;
    62				break;
    63			default:
    64				break;
    65			}
    66		}
    67		left -= sizeof(struct IEEEtypes_Rsn_t) + (count - 1) * sizeof(__be32);
    68		if (left < (int)sizeof(struct wpa_suite_ucast))
    69			return;
    70	
    71		key_mgmt = ((void *)rsn_ie + sizeof(struct IEEEtypes_Rsn_t) + (count - 1) * sizeof(__be32));
    72		count = le16_to_cpu(key_mgmt->count);
    73		if (left < (int)(sizeof(struct wpa_suite_ucast) +
    74				 (count - 1) * sizeof(__be32)))
    75			return;
    76	
    77		for (i = 0; i < count; i++) {
    78			switch (be32_to_cpu(key_mgmt->suite[i])) {
    79			case WLAN_AKM_SUITE_8021X:
    80				bss_config->key_mgmt |= KEY_MGMT_EAP;
    81				break;
    82			case WLAN_AKM_SUITE_PSK:
    83				bss_config->key_mgmt |= KEY_MGMT_PSK;
    84				break;
    85			case WLAN_AKM_SUITE_PSK_SHA256:
    86				bss_config->key_mgmt |= KEY_MGMT_PSK_SHA256;
    87				break;
    88			case WLAN_AKM_SUITE_SAE:
    89				bss_config->key_mgmt |= KEY_MGMT_SAE;
    90				break;
    91			case WLAN_AKM_SUITE_OWE:
    92				bss_config->key_mgmt |= KEY_MGMT_OWE;
    93				break;
    94			}
    95		}
    96	}
    97	

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