Re: [RFC][PATCH] vhost/vsock: Add vsock_list file to map cid with vhost tasks

From: kernel test robot <lkp@intel.com>
To: kbuild@lists.01.org
Subject: Re: [RFC][PATCH] vhost/vsock: Add vsock_list file to map cid with vhost tasks
Date: Thu, 06 May 2021 09:54:33 +0800	[thread overview]
Message-ID: <202105060909.EiCYOsaZ-lkp@intel.com> (raw)

[-- Attachment #1: Type: text/plain, Size: 3396 bytes --]

CC: kbuild-all(a)lists.01.org
In-Reply-To: <20210505163855.32dad8e7@gandalf.local.home>
References: <20210505163855.32dad8e7@gandalf.local.home>
TO: Steven Rostedt <rostedt@goodmis.org>

Hi Steven,

[FYI, it's a private test report for your RFC patch.]
[auto build test WARNING on vhost/linux-next]
[also build test WARNING on linux/master linus/master v5.12 next-20210505]
[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/Steven-Rostedt/vhost-vsock-Add-vsock_list-file-to-map-cid-with-vhost-tasks/20210506-044043
base:   https://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost.git linux-next
:::::: branch date: 5 hours ago
:::::: commit date: 5 hours ago
config: um-randconfig-s031-20210505 (attached as .config)
compiler: gcc-9 (Debian 9.3.0-22) 9.3.0
reproduce:
        # apt-get install sparse
        # sparse version: v0.6.3-341-g8af24329-dirty
        # https://github.com/0day-ci/linux/commit/615076d4f3c2d9c7da7dadb0850654ca6136f73a
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Steven-Rostedt/vhost-vsock-Add-vsock_list-file-to-map-cid-with-vhost-tasks/20210506-044043
        git checkout 615076d4f3c2d9c7da7dadb0850654ca6136f73a
        # save the attached .config to linux build tree
        make W=1 C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' W=1 ARCH=um 

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 >>)
>> drivers/vhost/vsock.c:960:9: sparse: sparse: context imbalance in 'vsock_start' - wrong count at exit
   drivers/vhost/vsock.c:963:13: sparse: sparse: context imbalance in 'vsock_stop' - unexpected unlock

vim +/vsock_start +960 drivers/vhost/vsock.c

615076d4f3c2d9 Steven Rostedt 2021-05-05  943  
615076d4f3c2d9 Steven Rostedt 2021-05-05  944  static void *vsock_start(struct seq_file *m, loff_t *pos)
615076d4f3c2d9 Steven Rostedt 2021-05-05  945  {
615076d4f3c2d9 Steven Rostedt 2021-05-05  946  	struct vsock_file_iter *iter = m->private;
615076d4f3c2d9 Steven Rostedt 2021-05-05  947  	loff_t l = 0;
615076d4f3c2d9 Steven Rostedt 2021-05-05  948  	void *t;
615076d4f3c2d9 Steven Rostedt 2021-05-05  949  
615076d4f3c2d9 Steven Rostedt 2021-05-05  950  	rcu_read_lock();
615076d4f3c2d9 Steven Rostedt 2021-05-05  951  
615076d4f3c2d9 Steven Rostedt 2021-05-05  952  	iter->index = -1;
615076d4f3c2d9 Steven Rostedt 2021-05-05  953  	iter->node = NULL;
615076d4f3c2d9 Steven Rostedt 2021-05-05  954  	t = vsock_next(m, iter, NULL);
615076d4f3c2d9 Steven Rostedt 2021-05-05  955  
615076d4f3c2d9 Steven Rostedt 2021-05-05  956  	for (; iter->index < HASH_SIZE(vhost_vsock_hash) && l < *pos;
615076d4f3c2d9 Steven Rostedt 2021-05-05  957  	     t = vsock_next(m, iter, &l))
615076d4f3c2d9 Steven Rostedt 2021-05-05  958  		;
615076d4f3c2d9 Steven Rostedt 2021-05-05  959  
615076d4f3c2d9 Steven Rostedt 2021-05-05 @960  	return t;
615076d4f3c2d9 Steven Rostedt 2021-05-05  961  }
615076d4f3c2d9 Steven Rostedt 2021-05-05  962  

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

[-- Attachment #2: config.gz --]
[-- Type: application/gzip, Size: 12519 bytes --]