Re: [PATCH] wifi: nl80211: Increase ie_len size to prevent truncated IEs in new peer notifications

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

Hi Thiyagarajan,

kernel test robot noticed the following build errors:

[auto build test ERROR on wireless-next/main]
[also build test ERROR on wireless/main linus/master v6.16-rc1 next-20260604]
[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/Thiyagarajan-Pandiyan/wifi-nl80211-Increase-ie_len-size-to-prevent-truncated-IEs-in-new-peer-notifications/20260605-043726
base:   https://git.kernel.org/pub/scm/linux/kernel/git/wireless/wireless-next.git main
patch link:    https://lore.kernel.org/r/20260604203027.406815-1-thiyagarajan%40aerlync.com
patch subject: [PATCH] wifi: nl80211: Increase ie_len size to prevent truncated IEs in new peer notifications
config: x86_64-kexec (https://download.01.org/0day-ci/archive/20260605/202606050734.F3c2JaGN-lkp@intel.com/config)
compiler: clang version 22.0.0git (https://github.com/llvm/llvm-project f43d6834093b19baf79beda8c0337ab020ac5f17)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260605/202606050734.F3c2JaGN-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/202606050734.F3c2JaGN-lkp@intel.com/

All errors (new ones prefixed by >>):

>> net/wireless/nl80211.c:21357:6: error: conflicting types for 'cfg80211_notify_new_peer_candidate'
    21357 | void cfg80211_notify_new_peer_candidate(struct net_device *dev, const u8 *addr,
          |      ^
   include/net/cfg80211.h:8687:6: note: previous declaration is here
    8687 | void cfg80211_notify_new_peer_candidate(struct net_device *dev,
         |      ^
   1 error generated.


vim +/cfg80211_notify_new_peer_candidate +21357 net/wireless/nl80211.c

04a773ade0680d Johannes Berg         2009-04-19  21356  
947add36ca2dcd Johannes Berg         2013-02-22 @21357  void cfg80211_notify_new_peer_candidate(struct net_device *dev, const u8 *addr,
a63204d4bff16d Thiyagarajan Pandiyan 2026-06-05  21358  					const u8 *ie, size_t ie_len,
ecbc12ad6b6826 Bob Copeland          2018-10-26  21359  					int sig_dbm, gfp_t gfp)
c93b5e717ec47b Javier Cardona        2011-04-07  21360  {
947add36ca2dcd Johannes Berg         2013-02-22  21361  	struct wireless_dev *wdev = dev->ieee80211_ptr;
f26cbf401be935 Zhao, Gang            2014-04-21  21362  	struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
c93b5e717ec47b Javier Cardona        2011-04-07  21363  	struct sk_buff *msg;
c93b5e717ec47b Javier Cardona        2011-04-07  21364  	void *hdr;
c93b5e717ec47b Javier Cardona        2011-04-07  21365  
947add36ca2dcd Johannes Berg         2013-02-22  21366  	if (WARN_ON(wdev->iftype != NL80211_IFTYPE_MESH_POINT))
947add36ca2dcd Johannes Berg         2013-02-22  21367  		return;
947add36ca2dcd Johannes Berg         2013-02-22  21368  
947add36ca2dcd Johannes Berg         2013-02-22  21369  	trace_cfg80211_notify_new_peer_candidate(dev, addr);
947add36ca2dcd Johannes Berg         2013-02-22  21370  
4ef8c1c93f848e Johannes Berg         2017-01-09  21371  	msg = nlmsg_new(100 + ie_len, gfp);
c93b5e717ec47b Javier Cardona        2011-04-07  21372  	if (!msg)
c93b5e717ec47b Javier Cardona        2011-04-07  21373  		return;
c93b5e717ec47b Javier Cardona        2011-04-07  21374  
c93b5e717ec47b Javier Cardona        2011-04-07  21375  	hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NEW_PEER_CANDIDATE);
c93b5e717ec47b Javier Cardona        2011-04-07  21376  	if (!hdr) {
c93b5e717ec47b Javier Cardona        2011-04-07  21377  		nlmsg_free(msg);
c93b5e717ec47b Javier Cardona        2011-04-07  21378  		return;
c93b5e717ec47b Javier Cardona        2011-04-07  21379  	}
c93b5e717ec47b Javier Cardona        2011-04-07  21380  
9360ffd1859720 David S. Miller       2012-03-29  21381  	if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
947add36ca2dcd Johannes Berg         2013-02-22  21382  	    nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
947add36ca2dcd Johannes Berg         2013-02-22  21383  	    nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr) ||
9360ffd1859720 David S. Miller       2012-03-29  21384  	    (ie_len && ie &&
ecbc12ad6b6826 Bob Copeland          2018-10-26  21385  	     nla_put(msg, NL80211_ATTR_IE, ie_len, ie)) ||
ecbc12ad6b6826 Bob Copeland          2018-10-26  21386  	    (sig_dbm &&
ecbc12ad6b6826 Bob Copeland          2018-10-26  21387  	     nla_put_u32(msg, NL80211_ATTR_RX_SIGNAL_DBM, sig_dbm)))
9360ffd1859720 David S. Miller       2012-03-29  21388  		goto nla_put_failure;
c93b5e717ec47b Javier Cardona        2011-04-07  21389  
3b7b72eed19684 Johannes Berg         2011-10-22  21390  	genlmsg_end(msg, hdr);
c93b5e717ec47b Javier Cardona        2011-04-07  21391  
68eb55031da7c9 Johannes Berg         2013-11-19  21392  	genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
2a94fe48f32ccf Johannes Berg         2013-11-19  21393  				NL80211_MCGRP_MLME, gfp);
c93b5e717ec47b Javier Cardona        2011-04-07  21394  	return;
c93b5e717ec47b Javier Cardona        2011-04-07  21395  
c93b5e717ec47b Javier Cardona        2011-04-07  21396   nla_put_failure:
c93b5e717ec47b Javier Cardona        2011-04-07  21397  	nlmsg_free(msg);
c93b5e717ec47b Javier Cardona        2011-04-07  21398  }
947add36ca2dcd Johannes Berg         2013-02-22  21399  EXPORT_SYMBOL(cfg80211_notify_new_peer_candidate);
c93b5e717ec47b Javier Cardona        2011-04-07  21400  

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