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Date: Wed, 16 Feb 2022 05:06:13 +0800
From: kernel test robot <lkp@...el.com>
To: Jiri Kosina <jikos@...nel.org>,
Johannes Berg <johannes@...solutions.net>
Cc: kbuild-all@...ts.01.org, linux-wireless@...r.kernel.org,
linux-kernel@...r.kernel.org
Subject: Re: [PATCH] mac80211: fix RCU usage in ieee80211_tx_h_select_key()
Hi Jiri,
I love your patch! Perhaps something to improve:
[auto build test WARNING on wireless-next/main]
[also build test WARNING on wireless/main jberg-mac80211-next/master jberg-mac80211/master v5.17-rc4 next-20220215]
[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]
url: https://github.com/0day-ci/linux/commits/Jiri-Kosina/mac80211-fix-RCU-usage-in-ieee80211_tx_h_select_key/20220215-234935
base: https://git.kernel.org/pub/scm/linux/kernel/git/wireless/wireless-next.git main
config: i386-randconfig-s002-20220214 (https://download.01.org/0day-ci/archive/20220216/202202160406.p1c7XduC-lkp@intel.com/config)
compiler: gcc-9 (Debian 9.3.0-22) 9.3.0
reproduce:
# apt-get install sparse
# sparse version: v0.6.4-dirty
# https://github.com/0day-ci/linux/commit/cdfe17d7fc283e125686bdd9a6bbc6fd60909bd7
git remote add linux-review https://github.com/0day-ci/linux
git fetch --no-tags linux-review Jiri-Kosina/mac80211-fix-RCU-usage-in-ieee80211_tx_h_select_key/20220215-234935
git checkout cdfe17d7fc283e125686bdd9a6bbc6fd60909bd7
# save the config file to linux build tree
mkdir build_dir
make W=1 C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=i386 SHELL=/bin/bash net/mac80211/
If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@...el.com>
sparse warnings: (new ones prefixed by >>)
>> net/mac80211/tx.c:652:29: sparse: sparse: incorrect type in assignment (different base types) @@ expected int ret @@ got restricted ieee80211_tx_result [usertype] @@
net/mac80211/tx.c:652:29: sparse: expected int ret
net/mac80211/tx.c:652:29: sparse: got restricted ieee80211_tx_result [usertype]
net/mac80211/tx.c:661:21: sparse: sparse: incorrect type in assignment (different base types) @@ expected int ret @@ got restricted ieee80211_tx_result [usertype] @@
net/mac80211/tx.c:661:21: sparse: expected int ret
net/mac80211/tx.c:661:21: sparse: got restricted ieee80211_tx_result [usertype]
net/mac80211/tx.c:664:13: sparse: sparse: incorrect type in assignment (different base types) @@ expected int ret @@ got restricted ieee80211_tx_result [usertype] @@
net/mac80211/tx.c:664:13: sparse: expected int ret
net/mac80211/tx.c:664:13: sparse: got restricted ieee80211_tx_result [usertype]
>> net/mac80211/tx.c:667:16: sparse: sparse: incorrect type in return expression (different base types) @@ expected restricted ieee80211_tx_result @@ got int ret @@
net/mac80211/tx.c:667:16: sparse: expected restricted ieee80211_tx_result
net/mac80211/tx.c:667:16: sparse: got int ret
vim +652 net/mac80211/tx.c
579
580 static ieee80211_tx_result debug_noinline
581 ieee80211_tx_h_select_key(struct ieee80211_tx_data *tx)
582 {
583 int ret;
584 struct ieee80211_key *key;
585 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
586 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data;
587
588 if (unlikely(info->flags & IEEE80211_TX_INTFL_DONT_ENCRYPT)) {
589 tx->key = NULL;
590 return TX_CONTINUE;
591 }
592
593 rcu_read_lock();
594
595 if (tx->sta &&
596 (key = rcu_dereference(tx->sta->ptk[tx->sta->ptk_idx])))
597 tx->key = key;
598 else if (ieee80211_is_group_privacy_action(tx->skb) &&
599 (key = rcu_dereference(tx->sdata->default_multicast_key)))
600 tx->key = key;
601 else if (ieee80211_is_mgmt(hdr->frame_control) &&
602 is_multicast_ether_addr(hdr->addr1) &&
603 ieee80211_is_robust_mgmt_frame(tx->skb) &&
604 (key = rcu_dereference(tx->sdata->default_mgmt_key)))
605 tx->key = key;
606 else if (is_multicast_ether_addr(hdr->addr1) &&
607 (key = rcu_dereference(tx->sdata->default_multicast_key)))
608 tx->key = key;
609 else if (!is_multicast_ether_addr(hdr->addr1) &&
610 (key = rcu_dereference(tx->sdata->default_unicast_key)))
611 tx->key = key;
612 else
613 tx->key = NULL;
614
615 if (tx->key) {
616 bool skip_hw = false;
617
618 /* TODO: add threshold stuff again */
619
620 switch (tx->key->conf.cipher) {
621 case WLAN_CIPHER_SUITE_WEP40:
622 case WLAN_CIPHER_SUITE_WEP104:
623 case WLAN_CIPHER_SUITE_TKIP:
624 if (!ieee80211_is_data_present(hdr->frame_control))
625 tx->key = NULL;
626 break;
627 case WLAN_CIPHER_SUITE_CCMP:
628 case WLAN_CIPHER_SUITE_CCMP_256:
629 case WLAN_CIPHER_SUITE_GCMP:
630 case WLAN_CIPHER_SUITE_GCMP_256:
631 if (!ieee80211_is_data_present(hdr->frame_control) &&
632 !ieee80211_use_mfp(hdr->frame_control, tx->sta,
633 tx->skb) &&
634 !ieee80211_is_group_privacy_action(tx->skb))
635 tx->key = NULL;
636 else
637 skip_hw = (tx->key->conf.flags &
638 IEEE80211_KEY_FLAG_SW_MGMT_TX) &&
639 ieee80211_is_mgmt(hdr->frame_control);
640 break;
641 case WLAN_CIPHER_SUITE_AES_CMAC:
642 case WLAN_CIPHER_SUITE_BIP_CMAC_256:
643 case WLAN_CIPHER_SUITE_BIP_GMAC_128:
644 case WLAN_CIPHER_SUITE_BIP_GMAC_256:
645 if (!ieee80211_is_mgmt(hdr->frame_control))
646 tx->key = NULL;
647 break;
648 }
649
650 if (unlikely(tx->key && tx->key->flags & KEY_FLAG_TAINTED &&
651 !ieee80211_is_deauth(hdr->frame_control))) {
> 652 ret = TX_DROP;
653 goto out;
654 }
655
656 if (!skip_hw && tx->key &&
657 tx->key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE)
658 info->control.hw_key = &tx->key->conf;
659 } else if (ieee80211_is_data_present(hdr->frame_control) && tx->sta &&
660 test_sta_flag(tx->sta, WLAN_STA_USES_ENCRYPTION)) {
661 ret = TX_DROP;
662 goto out;
663 }
664 ret = TX_CONTINUE;
665 out:
666 rcu_read_unlock();
> 667 return ret;
668 }
669
---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org
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