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* [dlm:next 10/16] fs/dlm/lowcomms.c:1497:16: sparse: sparse: context imbalance in 'dlm_lowcomms_new_msg' - different lock contexts for basic block
@ 2021-05-25 20:51 kernel test robot
  0 siblings, 0 replies; only message in thread
From: kernel test robot @ 2021-05-25 20:51 UTC (permalink / raw)
  To: kbuild

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CC: kbuild-all(a)lists.01.org
CC: cluster-devel(a)redhat.com
TO: Alexander Aring <aahringo@redhat.com>
CC: David Teigland <teigland@redhat.com>

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/teigland/linux-dlm.git next
head:   706474fbc5fedd7799b488962aad3541b235165b
commit: 8f2dc78dbc2010b497bb58e0460cb44c678a3c5b [10/16] fs: dlm: make buffer handling per msg
:::::: branch date: 6 hours ago
:::::: commit date: 6 hours ago
config: m68k-randconfig-s031-20210525 (attached as .config)
compiler: m68k-linux-gcc (GCC) 9.3.0
reproduce:
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # apt-get install sparse
        # sparse version: v0.6.3-341-g8af24329-dirty
        # https://git.kernel.org/pub/scm/linux/kernel/git/teigland/linux-dlm.git/commit/?id=8f2dc78dbc2010b497bb58e0460cb44c678a3c5b
        git remote add dlm https://git.kernel.org/pub/scm/linux/kernel/git/teigland/linux-dlm.git
        git fetch --no-tags dlm next
        git checkout 8f2dc78dbc2010b497bb58e0460cb44c678a3c5b
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' W=1 ARCH=m68k 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>


sparse warnings: (new ones prefixed by >>)
>> fs/dlm/lowcomms.c:1497:16: sparse: sparse: context imbalance in 'dlm_lowcomms_new_msg' - different lock contexts for basic block
   fs/dlm/lowcomms.c:1568:20: sparse: sparse: context imbalance in 'dlm_lowcomms_commit_msg' - unexpected unlock

vim +/dlm_lowcomms_new_msg +1497 fs/dlm/lowcomms.c

f0747ebf48f362 fs/dlm/lowcomms.c     Alexander Aring   2021-03-01  1496  
8f2dc78dbc2010 fs/dlm/lowcomms.c     Alexander Aring   2021-05-21 @1497  struct dlm_msg *dlm_lowcomms_new_msg(int nodeid, int len, gfp_t allocation,
8f2dc78dbc2010 fs/dlm/lowcomms.c     Alexander Aring   2021-05-21  1498  				     char **ppc, void (*cb)(struct dlm_mhandle *mh),
8f2dc78dbc2010 fs/dlm/lowcomms.c     Alexander Aring   2021-05-21  1499  				     struct dlm_mhandle *mh)
f0747ebf48f362 fs/dlm/lowcomms.c     Alexander Aring   2021-03-01  1500  {
b38bc9c2b3171f fs/dlm/lowcomms.c     Alexander Aring   2021-05-21  1501  	struct writequeue_entry *e;
f0747ebf48f362 fs/dlm/lowcomms.c     Alexander Aring   2021-03-01  1502  	struct connection *con;
8f2dc78dbc2010 fs/dlm/lowcomms.c     Alexander Aring   2021-05-21  1503  	struct dlm_msg *msg;
b38bc9c2b3171f fs/dlm/lowcomms.c     Alexander Aring   2021-05-21  1504  	int idx;
f0747ebf48f362 fs/dlm/lowcomms.c     Alexander Aring   2021-03-01  1505  
f0747ebf48f362 fs/dlm/lowcomms.c     Alexander Aring   2021-03-01  1506  	if (len > DEFAULT_BUFFER_SIZE ||
f0747ebf48f362 fs/dlm/lowcomms.c     Alexander Aring   2021-03-01  1507  	    len < sizeof(struct dlm_header)) {
f0747ebf48f362 fs/dlm/lowcomms.c     Alexander Aring   2021-03-01  1508  		BUILD_BUG_ON(PAGE_SIZE < DEFAULT_BUFFER_SIZE);
f0747ebf48f362 fs/dlm/lowcomms.c     Alexander Aring   2021-03-01  1509  		log_print("failed to allocate a buffer of size %d", len);
f0747ebf48f362 fs/dlm/lowcomms.c     Alexander Aring   2021-03-01  1510  		WARN_ON(1);
f0747ebf48f362 fs/dlm/lowcomms.c     Alexander Aring   2021-03-01  1511  		return NULL;
fdda387f73947e fs/dlm/lowcomms-tcp.c Patrick Caulfield 2006-11-02  1512  	}
f0747ebf48f362 fs/dlm/lowcomms.c     Alexander Aring   2021-03-01  1513  
b38bc9c2b3171f fs/dlm/lowcomms.c     Alexander Aring   2021-05-21  1514  	idx = srcu_read_lock(&connections_srcu);
f0747ebf48f362 fs/dlm/lowcomms.c     Alexander Aring   2021-03-01  1515  	con = nodeid2con(nodeid, allocation);
b38bc9c2b3171f fs/dlm/lowcomms.c     Alexander Aring   2021-05-21  1516  	if (!con) {
b38bc9c2b3171f fs/dlm/lowcomms.c     Alexander Aring   2021-05-21  1517  		srcu_read_unlock(&connections_srcu, idx);
fdda387f73947e fs/dlm/lowcomms-tcp.c Patrick Caulfield 2006-11-02  1518  		return NULL;
b38bc9c2b3171f fs/dlm/lowcomms.c     Alexander Aring   2021-05-21  1519  	}
f0747ebf48f362 fs/dlm/lowcomms.c     Alexander Aring   2021-03-01  1520  
8f2dc78dbc2010 fs/dlm/lowcomms.c     Alexander Aring   2021-05-21  1521  	msg = kzalloc(sizeof(*msg), allocation);
8f2dc78dbc2010 fs/dlm/lowcomms.c     Alexander Aring   2021-05-21  1522  	if (!msg) {
8f2dc78dbc2010 fs/dlm/lowcomms.c     Alexander Aring   2021-05-21  1523  		srcu_read_unlock(&connections_srcu, idx);
8f2dc78dbc2010 fs/dlm/lowcomms.c     Alexander Aring   2021-05-21  1524  		return NULL;
8f2dc78dbc2010 fs/dlm/lowcomms.c     Alexander Aring   2021-05-21  1525  	}
8f2dc78dbc2010 fs/dlm/lowcomms.c     Alexander Aring   2021-05-21  1526  
8f2dc78dbc2010 fs/dlm/lowcomms.c     Alexander Aring   2021-05-21  1527  	kref_init(&msg->ref);
8f2dc78dbc2010 fs/dlm/lowcomms.c     Alexander Aring   2021-05-21  1528  
8f2dc78dbc2010 fs/dlm/lowcomms.c     Alexander Aring   2021-05-21  1529  	e = new_wq_entry(con, len, allocation, ppc, cb, mh);
b38bc9c2b3171f fs/dlm/lowcomms.c     Alexander Aring   2021-05-21  1530  	if (!e) {
b38bc9c2b3171f fs/dlm/lowcomms.c     Alexander Aring   2021-05-21  1531  		srcu_read_unlock(&connections_srcu, idx);
8f2dc78dbc2010 fs/dlm/lowcomms.c     Alexander Aring   2021-05-21  1532  		kfree(msg);
b38bc9c2b3171f fs/dlm/lowcomms.c     Alexander Aring   2021-05-21  1533  		return NULL;
b38bc9c2b3171f fs/dlm/lowcomms.c     Alexander Aring   2021-05-21  1534  	}
b38bc9c2b3171f fs/dlm/lowcomms.c     Alexander Aring   2021-05-21  1535  
8f2dc78dbc2010 fs/dlm/lowcomms.c     Alexander Aring   2021-05-21  1536  	msg->ppc = *ppc;
8f2dc78dbc2010 fs/dlm/lowcomms.c     Alexander Aring   2021-05-21  1537  	msg->len = len;
8f2dc78dbc2010 fs/dlm/lowcomms.c     Alexander Aring   2021-05-21  1538  	msg->entry = e;
8f2dc78dbc2010 fs/dlm/lowcomms.c     Alexander Aring   2021-05-21  1539  
b38bc9c2b3171f fs/dlm/lowcomms.c     Alexander Aring   2021-05-21  1540  	/* we assume if successful commit must called */
8f2dc78dbc2010 fs/dlm/lowcomms.c     Alexander Aring   2021-05-21  1541  	msg->idx = idx;
b38bc9c2b3171f fs/dlm/lowcomms.c     Alexander Aring   2021-05-21  1542  
8f2dc78dbc2010 fs/dlm/lowcomms.c     Alexander Aring   2021-05-21  1543  	return msg;
fdda387f73947e fs/dlm/lowcomms-tcp.c Patrick Caulfield 2006-11-02  1544  }
fdda387f73947e fs/dlm/lowcomms-tcp.c Patrick Caulfield 2006-11-02  1545  

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all(a)lists.01.org

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