[kdave-btrfs-devel:misc-next 47/71] fs/btrfs/raid56.c:1502:5-24: atomic_dec_and_test variation before object free at line 1503.

[kdave-btrfs-devel:misc-next 47/71] fs/btrfs/raid56.c:1502:5-24: atomic_dec_and_test variation before object free at line 1503.

[kernel test robot]

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CC: kbuild-all(a)lists.01.org
BCC: lkp(a)intel.com
CC: linux-kernel(a)vger.kernel.org
TO: Christoph Hellwig <hch@lst.de>
CC: David Sterba <dsterba@suse.com>

tree:   https://github.com/kdave/btrfs-devel.git misc-next
head:   e2a46f3f73fd5aac0241242d535905286a947113
commit: 94fa5c9a0e7e708aac2464c31b6fa062dff0871e [47/71] btrfs: defer I/O completion based on the btrfs_raid_bio
:::::: branch date: 9 hours ago
:::::: commit date: 35 hours ago
config: i386-randconfig-c021 (https://download.01.org/0day-ci/archive/20220608/202206080945.WrIdHzB3-lkp(a)intel.com/config)
compiler: gcc-11 (Debian 11.3.0-1) 11.3.0

If you fix the issue, kindly add following tag where applicable
Reported-by: kernel test robot <lkp@intel.com>
Reported-by: Julia Lawall <julia.lawall@lip6.fr>


cocci warnings: (new ones prefixed by >>)
>> fs/btrfs/raid56.c:1502:5-24: atomic_dec_and_test variation before object free at line 1503.

vim +1502 fs/btrfs/raid56.c

53b381b3abeb86 David Woodhouse   2013-01-29  1490  
94fa5c9a0e7e70 Christoph Hellwig 2022-05-26  1491  static void raid56_bio_end_io(struct bio *bio)
53b381b3abeb86 David Woodhouse   2013-01-29  1492  {
53b381b3abeb86 David Woodhouse   2013-01-29  1493  	struct btrfs_raid_bio *rbio = bio->bi_private;
53b381b3abeb86 David Woodhouse   2013-01-29  1494  
4e4cbee93d5613 Christoph Hellwig 2017-06-03  1495  	if (bio->bi_status)
53b381b3abeb86 David Woodhouse   2013-01-29  1496  		fail_bio_stripe(rbio, bio);
53b381b3abeb86 David Woodhouse   2013-01-29  1497  	else
5fdb7afc6f94d5 Qu Wenruo         2022-04-01  1498  		set_bio_pages_uptodate(rbio, bio);
53b381b3abeb86 David Woodhouse   2013-01-29  1499  
53b381b3abeb86 David Woodhouse   2013-01-29  1500  	bio_put(bio);
53b381b3abeb86 David Woodhouse   2013-01-29  1501  
94fa5c9a0e7e70 Christoph Hellwig 2022-05-26 @1502  	if (atomic_dec_and_test(&rbio->stripes_pending))
94fa5c9a0e7e70 Christoph Hellwig 2022-05-26 @1503  		queue_work(rbio->bioc->fs_info->endio_raid56_workers,
94fa5c9a0e7e70 Christoph Hellwig 2022-05-26  1504  			   &rbio->end_io_work);
94fa5c9a0e7e70 Christoph Hellwig 2022-05-26  1505  }
53b381b3abeb86 David Woodhouse   2013-01-29  1506  

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