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From: kernel test robot <[email protected]>
To: David Howells <[email protected]>
Cc: [email protected], [email protected],
	GNU/Weeb Mailing List <[email protected]>,
	[email protected]
Subject: [ammarfaizi2-block:dhowells/linux-fs/rxrpc-multiqueue 3/5] net/rxrpc/recvmsg.c:37:19: warning: variable 'sk' is uninitialized when used here
Date: Wed, 22 Jun 2022 03:13:24 +0800	[thread overview]
Message-ID: <[email protected]> (raw)

tree:   https://github.com/ammarfaizi2/linux-block dhowells/linux-fs/rxrpc-multiqueue
head:   f37988fef6da3fdc3545e5a65eb9241f82f539f2
commit: 928631b5285b0aaebed61025256868cd126c9281 [3/5] rxrpc: Allow UDP socket sharing for AF_RXRPC service sockets
config: i386-randconfig-a013 (https://download.01.org/0day-ci/archive/20220622/[email protected]/config)
compiler: clang version 15.0.0 (https://github.com/llvm/llvm-project af6d2a0b6825e71965f3e2701a63c239fa0ad70f)
reproduce (this is a W=1 build):
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # https://github.com/ammarfaizi2/linux-block/commit/928631b5285b0aaebed61025256868cd126c9281
        git remote add ammarfaizi2-block https://github.com/ammarfaizi2/linux-block
        git fetch --no-tags ammarfaizi2-block dhowells/linux-fs/rxrpc-multiqueue
        git checkout 928631b5285b0aaebed61025256868cd126c9281
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=i386 SHELL=/bin/bash net/rxrpc/

If you fix the issue, kindly add following tag where applicable
Reported-by: kernel test robot <[email protected]>

All warnings (new ones prefixed by >>):

>> net/rxrpc/recvmsg.c:37:19: warning: variable 'sk' is uninitialized when used here [-Wuninitialized]
                   call->notify_rx(sk, call, call->user_call_ID);
                                   ^~
   net/rxrpc/recvmsg.c:26:17: note: initialize the variable 'sk' to silence this warning
           struct sock *sk;
                          ^
                           = NULL
   1 warning generated.


vim +/sk +37 net/rxrpc/recvmsg.c

17926a79320afa net/rxrpc/ar-recvmsg.c David Howells 2007-04-26  18  
17926a79320afa net/rxrpc/ar-recvmsg.c David Howells 2007-04-26  19  /*
248f219cb8bcbf net/rxrpc/recvmsg.c    David Howells 2016-09-08  20   * Post a call for attention by the socket or kernel service.  Further
248f219cb8bcbf net/rxrpc/recvmsg.c    David Howells 2016-09-08  21   * notifications are suppressed by putting recvmsg_link on a dummy queue.
17926a79320afa net/rxrpc/ar-recvmsg.c David Howells 2007-04-26  22   */
248f219cb8bcbf net/rxrpc/recvmsg.c    David Howells 2016-09-08  23  void rxrpc_notify_socket(struct rxrpc_call *call)
17926a79320afa net/rxrpc/ar-recvmsg.c David Howells 2007-04-26  24  {
248f219cb8bcbf net/rxrpc/recvmsg.c    David Howells 2016-09-08  25  	struct rxrpc_sock *rx;
248f219cb8bcbf net/rxrpc/recvmsg.c    David Howells 2016-09-08  26  	struct sock *sk;
17926a79320afa net/rxrpc/ar-recvmsg.c David Howells 2007-04-26  27  
248f219cb8bcbf net/rxrpc/recvmsg.c    David Howells 2016-09-08  28  	_enter("%d", call->debug_id);
17926a79320afa net/rxrpc/ar-recvmsg.c David Howells 2007-04-26  29  
248f219cb8bcbf net/rxrpc/recvmsg.c    David Howells 2016-09-08  30  	if (!list_empty(&call->recvmsg_link))
248f219cb8bcbf net/rxrpc/recvmsg.c    David Howells 2016-09-08  31  		return;
17926a79320afa net/rxrpc/ar-recvmsg.c David Howells 2007-04-26  32  
248f219cb8bcbf net/rxrpc/recvmsg.c    David Howells 2016-09-08  33  	rcu_read_lock();
17926a79320afa net/rxrpc/ar-recvmsg.c David Howells 2007-04-26  34  
248f219cb8bcbf net/rxrpc/recvmsg.c    David Howells 2016-09-08  35  	if (call->notify_rx) {
20acbd9a7aeee0 net/rxrpc/recvmsg.c    David Howells 2017-11-02  36  		spin_lock_bh(&call->notify_lock);
248f219cb8bcbf net/rxrpc/recvmsg.c    David Howells 2016-09-08 @37  		call->notify_rx(sk, call, call->user_call_ID);
20acbd9a7aeee0 net/rxrpc/recvmsg.c    David Howells 2017-11-02  38  		spin_unlock_bh(&call->notify_lock);
928631b5285b0a net/rxrpc/recvmsg.c    David Howells 2022-06-16  39  		goto out;
928631b5285b0a net/rxrpc/recvmsg.c    David Howells 2022-06-16  40  	}
928631b5285b0a net/rxrpc/recvmsg.c    David Howells 2022-06-16  41  
928631b5285b0a net/rxrpc/recvmsg.c    David Howells 2022-06-16  42  	rx = rcu_dereference(call->socket);
928631b5285b0a net/rxrpc/recvmsg.c    David Howells 2022-06-16  43  	if (rx) {
928631b5285b0a net/rxrpc/recvmsg.c    David Howells 2022-06-16  44  		sk = &rx->sk;
928631b5285b0a net/rxrpc/recvmsg.c    David Howells 2022-06-16  45  		if (sk->sk_state >= RXRPC_CLOSE)
928631b5285b0a net/rxrpc/recvmsg.c    David Howells 2022-06-16  46  			goto out;
928631b5285b0a net/rxrpc/recvmsg.c    David Howells 2022-06-16  47  
248f219cb8bcbf net/rxrpc/recvmsg.c    David Howells 2016-09-08  48  		write_lock_bh(&rx->recvmsg_lock);
248f219cb8bcbf net/rxrpc/recvmsg.c    David Howells 2016-09-08  49  		if (list_empty(&call->recvmsg_link)) {
248f219cb8bcbf net/rxrpc/recvmsg.c    David Howells 2016-09-08  50  			rxrpc_get_call(call, rxrpc_call_got);
248f219cb8bcbf net/rxrpc/recvmsg.c    David Howells 2016-09-08  51  			list_add_tail(&call->recvmsg_link, &rx->recvmsg_q);
248f219cb8bcbf net/rxrpc/recvmsg.c    David Howells 2016-09-08  52  		}
248f219cb8bcbf net/rxrpc/recvmsg.c    David Howells 2016-09-08  53  		write_unlock_bh(&rx->recvmsg_lock);
17926a79320afa net/rxrpc/ar-recvmsg.c David Howells 2007-04-26  54  
248f219cb8bcbf net/rxrpc/recvmsg.c    David Howells 2016-09-08  55  		if (!sock_flag(sk, SOCK_DEAD)) {
248f219cb8bcbf net/rxrpc/recvmsg.c    David Howells 2016-09-08  56  			_debug("call %ps", sk->sk_data_ready);
248f219cb8bcbf net/rxrpc/recvmsg.c    David Howells 2016-09-08  57  			sk->sk_data_ready(sk);
248f219cb8bcbf net/rxrpc/recvmsg.c    David Howells 2016-09-08  58  		}
928631b5285b0a net/rxrpc/recvmsg.c    David Howells 2022-06-16  59  		goto out;
928631b5285b0a net/rxrpc/recvmsg.c    David Howells 2022-06-16  60  	}
928631b5285b0a net/rxrpc/recvmsg.c    David Howells 2022-06-16  61  
928631b5285b0a net/rxrpc/recvmsg.c    David Howells 2022-06-16  62  	if (call->service) {
928631b5285b0a net/rxrpc/recvmsg.c    David Howells 2022-06-16  63  		struct rxrpc_service *b = call->service;
928631b5285b0a net/rxrpc/recvmsg.c    David Howells 2022-06-16  64  
928631b5285b0a net/rxrpc/recvmsg.c    David Howells 2022-06-16  65  		spin_lock_bh(&b->incoming_lock);
928631b5285b0a net/rxrpc/recvmsg.c    David Howells 2022-06-16  66  		if (list_empty(&call->recvmsg_link)) {
928631b5285b0a net/rxrpc/recvmsg.c    David Howells 2022-06-16  67  			list_add_tail(&call->recvmsg_link, &b->to_be_accepted);
928631b5285b0a net/rxrpc/recvmsg.c    David Howells 2022-06-16  68  			b->nr_tba++;
248f219cb8bcbf net/rxrpc/recvmsg.c    David Howells 2016-09-08  69  		}
928631b5285b0a net/rxrpc/recvmsg.c    David Howells 2022-06-16  70  		list_for_each_entry(rx, &b->waiting_sockets, accept_link) {
928631b5285b0a net/rxrpc/recvmsg.c    David Howells 2022-06-16  71  			sk = &rx->sk;
928631b5285b0a net/rxrpc/recvmsg.c    David Howells 2022-06-16  72  			if (!sock_flag(sk, SOCK_DEAD))
928631b5285b0a net/rxrpc/recvmsg.c    David Howells 2022-06-16  73  				sk->sk_data_ready(sk);
928631b5285b0a net/rxrpc/recvmsg.c    David Howells 2022-06-16  74  		}
928631b5285b0a net/rxrpc/recvmsg.c    David Howells 2022-06-16  75  		spin_unlock_bh(&b->incoming_lock);
248f219cb8bcbf net/rxrpc/recvmsg.c    David Howells 2016-09-08  76  	}
17926a79320afa net/rxrpc/ar-recvmsg.c David Howells 2007-04-26  77  
928631b5285b0a net/rxrpc/recvmsg.c    David Howells 2022-06-16  78  out:
248f219cb8bcbf net/rxrpc/recvmsg.c    David Howells 2016-09-08  79  	rcu_read_unlock();
248f219cb8bcbf net/rxrpc/recvmsg.c    David Howells 2016-09-08  80  	_leave("");
248f219cb8bcbf net/rxrpc/recvmsg.c    David Howells 2016-09-08  81  }
17926a79320afa net/rxrpc/ar-recvmsg.c David Howells 2007-04-26  82  

:::::: The code at line 37 was first introduced by commit
:::::: 248f219cb8bcbfbd7f132752d44afa2df7c241d1 rxrpc: Rewrite the data and ack handling code

:::::: TO: David Howells <[email protected]>
:::::: CC: David Howells <[email protected]>

-- 
0-DAY CI Kernel Test Service
https://01.org/lkp

                 reply	other threads:[~2022-06-21 19:14 UTC|newest]

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