Description of problem:
I get a notification of a problem in gnome-shell shortly after logging in, so I'm not really sure what caused it.

Additional info:
reporter:       libreport-2.7.2
[ INFO: possible recursive locking detected ]
4.8.0-0.rc2.git3.1.fc25.x86_64 #1 Not tainted
---------------------------------------------
cupsd/1438 is trying to acquire lock:
 (&ei->log_mutex){+.+...}, at: [<ffffffffc029ae12>] btrfs_log_inode+0x162/0x10f0 [btrfs]

but task is already holding lock:
 (&ei->log_mutex){+.+...}, at: [<ffffffffc029ae12>] btrfs_log_inode+0x162/0x10f0 [btrfs]

other info that might help us debug this:
 Possible unsafe locking scenario:

       CPU0
       ----
  lock(&ei->log_mutex);
  lock(&ei->log_mutex);

 *** DEADLOCK ***

 May be due to missing lock nesting notation

5 locks held by cupsd/1438:
 #0:  (sb_writers#8){.+.+.+}, at: [<ffffffff9e2a70b4>] __sb_start_write+0xb4/0xf0
 #1:  (&type->i_mutex_dir_key#3/1){+.+.+.}, at: [<ffffffff9e2afa2a>] lock_rename+0xda/0x100
 #2:  (&sb->s_type->i_mutex_key#13/4){+.+...}, at: [<ffffffff9e2c41c6>] lock_two_nondirectories+0x66/0x70
 #3:  (sb_internal){.+.+.+}, at: [<ffffffff9e2a7078>] __sb_start_write+0x78/0xf0
 #4:  (&ei->log_mutex){+.+...}, at: [<ffffffffc029ae12>] btrfs_log_inode+0x162/0x10f0 [btrfs]

stack backtrace:
CPU: 1 PID: 1438 Comm: cupsd Not tainted 4.8.0-0.rc2.git3.1.fc25.x86_64 #1
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.9.1-1.fc24 04/01/2014
 0000000000000086 00000000cda3dbda ffff9e9cc2b037a0 ffffffff9e467eb3
 ffffffff9fbe0ba0 ffff9e9cc2af8000 ffff9e9cc2b03868 ffffffff9e10f27e
 00000000c2b037d0 ffffffff00000005 000000009e8f661e ffffffff9f4e0e00
Call Trace:
 [<ffffffff9e467eb3>] dump_stack+0x86/0xc3
 [<ffffffff9e10f27e>] __lock_acquire+0x78e/0x1290
 [<ffffffff9e037f29>] ? sched_clock+0x9/0x10
 [<ffffffff9e0ea687>] ? sched_clock_cpu+0xa7/0xc0
 [<ffffffff9e8f661e>] ? mutex_unlock+0xe/0x10
 [<ffffffff9e1101e6>] lock_acquire+0xf6/0x1f0
 [<ffffffffc029ae12>] ? btrfs_log_inode+0x162/0x10f0 [btrfs]
 [<ffffffff9e8f59a6>] mutex_lock_nested+0x86/0x3f0
 [<ffffffffc029ae12>] ? btrfs_log_inode+0x162/0x10f0 [btrfs]
 [<ffffffff9e8f661e>] ? mutex_unlock+0xe/0x10
 [<ffffffffc029ae12>] ? btrfs_log_inode+0x162/0x10f0 [btrfs]
 [<ffffffffc029ae12>] btrfs_log_inode+0x162/0x10f0 [btrfs]
 [<ffffffff9e0deb69>] ? __might_sleep+0x49/0x80
 [<ffffffffc029b93c>] btrfs_log_inode+0xc8c/0x10f0 [btrfs]
 [<ffffffff9e037f29>] ? sched_clock+0x9/0x10
 [<ffffffff9e8f661e>] ? mutex_unlock+0xe/0x10
 [<ffffffffc029c070>] btrfs_log_inode_parent+0x240/0x940 [btrfs]
 [<ffffffff9e8f92e7>] ? _raw_spin_unlock+0x27/0x40
 [<ffffffffc0256dba>] ? btrfs_update_inode+0xda/0x110 [btrfs]
 [<ffffffffc029dcf1>] btrfs_log_new_name+0x71/0x90 [btrfs]
 [<ffffffffc0260cd0>] btrfs_rename2+0x1090/0x17a0 [btrfs]
 [<ffffffff9e12df4d>] ? debug_lockdep_rcu_enabled+0x1d/0x20
 [<ffffffff9e2c41c6>] ? lock_two_nondirectories+0x66/0x70
 [<ffffffff9e2b1662>] vfs_rename+0x5c2/0x970
 [<ffffffff9e2af900>] ? __lookup_hash+0x50/0xa0
 [<ffffffff9e2b81e7>] SyS_rename+0x3a7/0x3d0
 [<ffffffff9e8f9c3c>] entry_SYSCALL_64_fastpath+0x1f/0xbd

Potential duplicate: bug 1368545