======================================================
WARNING: possible circular locking dependency detected
5.0.0+ #7 Not tainted
------------------------------------------------------
syz-executor.4/9340 is trying to acquire lock:
0000000019c43556 (&sig->cred_guard_mutex){+.+.}, at: do_io_accounting+0x1f4/0x830 fs/proc/base.c:2707

but task is already holding lock:
00000000aa0210d9 (&p->lock){+.+.}, at: seq_read+0x71/0x1130 fs/seq_file.c:161

which lock already depends on the new lock.


the existing dependency chain (in reverse order) is:

-> #2 (&p->lock){+.+.}:
       __mutex_lock_common kernel/locking/mutex.c:925 [inline]
       __mutex_lock+0xf7/0x1310 kernel/locking/mutex.c:1072
       mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1087
       seq_read+0x71/0x1130 fs/seq_file.c:161
       proc_reg_read+0x1fa/0x2c0 fs/proc/inode.c:229
       do_loop_readv_writev fs/read_write.c:700 [inline]
       do_loop_readv_writev fs/read_write.c:687 [inline]
       do_iter_read+0x4a9/0x660 fs/read_write.c:921
       vfs_readv+0xf0/0x160 fs/read_write.c:983
       kernel_readv fs/splice.c:362 [inline]
       default_file_splice_read+0x475/0x890 fs/splice.c:417
       do_splice_to+0x12a/0x190 fs/splice.c:880
       do_splice+0x10a0/0x1490 fs/splice.c:1187
       __do_sys_splice fs/splice.c:1428 [inline]
       __se_sys_splice fs/splice.c:1408 [inline]
       __ia32_sys_splice+0x2c4/0x330 fs/splice.c:1408
       do_syscall_32_irqs_on arch/x86/entry/common.c:326 [inline]
       do_fast_syscall_32+0x281/0xc98 arch/x86/entry/common.c:397
       entry_SYSENTER_compat+0x70/0x7f arch/x86/entry/entry_64_compat.S:139

-> #1 (&pipe->mutex/1){+.+.}:
       __mutex_lock_common kernel/locking/mutex.c:925 [inline]
       __mutex_lock+0xf7/0x1310 kernel/locking/mutex.c:1072
       mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1087
       __pipe_lock fs/pipe.c:83 [inline]
       fifo_open+0x159/0xb00 fs/pipe.c:905
       do_dentry_open+0x47d/0x1130 fs/open.c:771
       vfs_open+0xa0/0xd0 fs/open.c:880
       do_last fs/namei.c:3418 [inline]
       path_openat+0x10d7/0x4690 fs/namei.c:3534
       do_filp_open+0x1a1/0x280 fs/namei.c:3564
       do_open_execat+0x13b/0x6d0 fs/exec.c:856
       __do_execve_file.isra.0+0x178d/0x23f0 fs/exec.c:1758
       do_execveat_common fs/exec.c:1865 [inline]
       compat_do_execve fs/exec.c:1909 [inline]
       __do_compat_sys_execve fs/exec.c:1984 [inline]
       __se_compat_sys_execve fs/exec.c:1980 [inline]
       __ia32_compat_sys_execve+0x94/0xc0 fs/exec.c:1980
       do_syscall_32_irqs_on arch/x86/entry/common.c:326 [inline]
       do_fast_syscall_32+0x281/0xc98 arch/x86/entry/common.c:397
       entry_SYSENTER_compat+0x70/0x7f arch/x86/entry/entry_64_compat.S:139

-> #0 (&sig->cred_guard_mutex){+.+.}:
       lock_acquire+0x16f/0x3f0 kernel/locking/lockdep.c:3841
       __mutex_lock_common kernel/locking/mutex.c:925 [inline]
       __mutex_lock+0xf7/0x1310 kernel/locking/mutex.c:1072
       mutex_lock_killable_nested+0x16/0x20 kernel/locking/mutex.c:1102
       do_io_accounting+0x1f4/0x830 fs/proc/base.c:2707
       proc_tgid_io_accounting+0x23/0x30 fs/proc/base.c:2756
       proc_single_show+0xf6/0x180 fs/proc/base.c:739
       seq_read+0x4db/0x1130 fs/seq_file.c:229
       do_loop_readv_writev fs/read_write.c:700 [inline]
       do_loop_readv_writev fs/read_write.c:687 [inline]
       do_iter_read+0x4a9/0x660 fs/read_write.c:921
       compat_readv+0x18e/0x200 fs/read_write.c:1164
       do_compat_preadv64+0x190/0x1c0 fs/read_write.c:1213
       __do_compat_sys_preadv fs/read_write.c:1233 [inline]
       __se_compat_sys_preadv fs/read_write.c:1227 [inline]
       __ia32_compat_sys_preadv+0xc7/0x140 fs/read_write.c:1227
       do_syscall_32_irqs_on arch/x86/entry/common.c:326 [inline]
       do_fast_syscall_32+0x281/0xc98 arch/x86/entry/common.c:397
       entry_SYSENTER_compat+0x70/0x7f arch/x86/entry/entry_64_compat.S:139

other info that might help us debug this:

Chain exists of:
  &sig->cred_guard_mutex --> &pipe->mutex/1 --> &p->lock

 Possible unsafe locking scenario:

       CPU0                    CPU1
       ----                    ----
  lock(&p->lock);
                               lock(&pipe->mutex/1);
                               lock(&p->lock);
  lock(&sig->cred_guard_mutex);

 *** DEADLOCK ***

1 lock held by syz-executor.4/9340:
 #0: 00000000aa0210d9 (&p->lock){+.+.}, at: seq_read+0x71/0x1130 fs/seq_file.c:161

stack backtrace:
CPU: 1 PID: 9340 Comm: syz-executor.4 Not tainted 5.0.0+ #7
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x172/0x1f0 lib/dump_stack.c:113
 print_circular_bug.isra.0.cold+0x1cc/0x28f kernel/locking/lockdep.c:1224
 check_prev_add kernel/locking/lockdep.c:1866 [inline]
 check_prevs_add kernel/locking/lockdep.c:1979 [inline]
 validate_chain kernel/locking/lockdep.c:2350 [inline]
 __lock_acquire+0x2f00/0x4700 kernel/locking/lockdep.c:3338
 lock_acquire+0x16f/0x3f0 kernel/locking/lockdep.c:3841
 __mutex_lock_common kernel/locking/mutex.c:925 [inline]
 __mutex_lock+0xf7/0x1310 kernel/locking/mutex.c:1072
 mutex_lock_killable_nested+0x16/0x20 kernel/locking/mutex.c:1102
 do_io_accounting+0x1f4/0x830 fs/proc/base.c:2707
 proc_tgid_io_accounting+0x23/0x30 fs/proc/base.c:2756
 proc_single_show+0xf6/0x180 fs/proc/base.c:739
 seq_read+0x4db/0x1130 fs/seq_file.c:229
 do_loop_readv_writev fs/read_write.c:700 [inline]
 do_loop_readv_writev fs/read_write.c:687 [inline]
 do_iter_read+0x4a9/0x660 fs/read_write.c:921
 compat_readv+0x18e/0x200 fs/read_write.c:1164
 do_compat_preadv64+0x190/0x1c0 fs/read_write.c:1213
 __do_compat_sys_preadv fs/read_write.c:1233 [inline]
 __se_compat_sys_preadv fs/read_write.c:1227 [inline]
 __ia32_compat_sys_preadv+0xc7/0x140 fs/read_write.c:1227
 do_syscall_32_irqs_on arch/x86/entry/common.c:326 [inline]
 do_fast_syscall_32+0x281/0xc98 arch/x86/entry/common.c:397
 entry_SYSENTER_compat+0x70/0x7f arch/x86/entry/entry_64_compat.S:139
RIP: 0023:0xf7f2c869
Code: 85 d2 74 02 89 0a 5b 5d c3 8b 04 24 c3 8b 14 24 c3 8b 3c 24 c3 90 90 90 90 90 90 90 90 90 90 90 90 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 eb 0d 90 90 90 90 90 90 90 90 90 90 90 90
RSP: 002b:00000000f5d280cc EFLAGS: 00000296 ORIG_RAX: 000000000000014d
RAX: ffffffffffffffda RBX: 0000000000000006 RCX: 0000000020000480
RDX: 00000000000002a1 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
kobject: '0:54' (00000000ab960cd9): kobject_add_internal: parent: 'bdi', set: 'devices'
binder: 9294:9306 ioctl c0306201 0 returned -14
kobject: 'loop5' (00000000879ba919): kobject_uevent_env
kobject: '0:54' (00000000ab960cd9): kobject_uevent_env
binder: BINDER_SET_CONTEXT_MGR already set
kobject: 'loop5' (00000000879ba919): fill_kobj_path: path = '/devices/virtual/block/loop5'
binder: 9294:9306 ioctl 40046207 0 returned -16
binder_alloc: 9294: binder_alloc_buf, no vma
binder: 9294:9349 transaction failed 29189/-3, size 24-8 line 3035
kobject: '0:54' (00000000ab960cd9): fill_kobj_path: path = '/devices/virtual/bdi/0:54'
binder: 9294:9348 Release 1 refcount change on invalid ref 1 ret -22
binder: release 9294:9295 transaction 2 out, still active
binder: send failed reply for transaction 2, target dead
kobject: 'loop0' (000000003653efc2): kobject_uevent_env
kobject: 'loop0' (000000003653efc2): fill_kobj_path: path = '/devices/virtual/block/loop0'
kobject: '0:54' (00000000ab960cd9): kobject_uevent_env
kobject: 'loop3' (00000000608c6abe): kobject_uevent_env
kobject: '0:54' (00000000ab960cd9): fill_kobj_path: path = '/devices/virtual/bdi/0:54'
kobject: 'loop3' (00000000608c6abe): fill_kobj_path: path = '/devices/virtual/block/loop3'
kobject: '0:54' (00000000ab960cd9): kobject_cleanup, parent           (null)
kobject: 'loop5' (00000000879ba919): kobject_uevent_env
kobject: 'loop5' (00000000879ba919): fill_kobj_path: path = '/devices/virtual/block/loop5'
kobject: '0:54' (00000000ab960cd9): calling ktype release
kobject: 'loop1' (000000007d84fd2a): kobject_uevent_env
kobject: 'loop1' (000000007d84fd2a): fill_kobj_path: path = '/devices/virtual/block/loop1'
kobject: '0:54': free name
kobject: 'loop5' (00000000879ba919): kobject_uevent_env
kobject: '0:53' (000000009bd7f345): kobject_add_internal: parent: 'bdi', set: 'devices'
kobject: 'loop5' (00000000879ba919): fill_kobj_path: path = '/devices/virtual/block/loop5'
kobject: '0:53' (000000009bd7f345): kobject_uevent_env
kobject: 'loop4' (00000000a2c97560): kobject_uevent_env
kobject: 'loop4' (00000000a2c97560): fill_kobj_path: path = '/devices/virtual/block/loop4'
kobject: '0:53' (000000009bd7f345): fill_kobj_path: path = '/devices/virtual/bdi/0:53'
kobject: 'loop1' (000000007d84fd2a): kobject_uevent_env
kobject: 'loop1' (000000007d84fd2a): fill_kobj_path: path = '/devices/virtual/block/loop1'
kobject: 'loop0' (000000003653efc2): kobject_uevent_env
kobject: 'loop0' (000000003653efc2): fill_kobj_path: path = '/devices/virtual/block/loop0'
kobject: 'loop3' (00000000608c6abe): kobject_uevent_env
kobject: 'loop3' (00000000608c6abe): fill_kobj_path: path = '/devices/virtual/block/loop3'
kobject: 'loop4' (00000000a2c97560): kobject_uevent_env
kobject: 'loop4' (00000000a2c97560): fill_kobj_path: path = '/devices/virtual/block/loop4'
kobject: '0:53' (000000009bd7f345): kobject_uevent_env
kobject: '0:53' (000000009bd7f345): fill_kobj_path: path = '/devices/virtual/bdi/0:53'
kobject: 'loop0' (000000003653efc2): kobject_uevent_env
kobject: '0:53' (000000009bd7f345): kobject_cleanup, parent           (null)
kobject: 'loop0' (000000003653efc2): fill_kobj_path: path = '/devices/virtual/block/loop0'
kobject: '0:53' (000000009bd7f345): calling ktype release
kobject: '0:53': free name
kobject: 'loop2' (00000000c6fa5184): kobject_uevent_env
kobject: 'loop2' (00000000c6fa5184): fill_kobj_path: path = '/devices/virtual/block/loop2'
kobject: 'loop3' (00000000608c6abe): kobject_uevent_env
kobject: 'loop3' (00000000608c6abe): fill_kobj_path: path = '/devices/virtual/block/loop3'
kobject: 'loop0' (000000003653efc2): kobject_uevent_env
kobject: 'loop0' (000000003653efc2): fill_kobj_path: path = '/devices/virtual/block/loop0'
kobject: '0:53' (00000000f877523f): kobject_add_internal: parent: 'bdi', set: 'devices'
kobject: 'loop5' (00000000879ba919): kobject_uevent_env
kobject: 'loop5' (00000000879ba919): fill_kobj_path: path = '/devices/virtual/block/loop5'
kobject: 'loop1' (000000007d84fd2a): kobject_uevent_env
kobject: '0:53' (00000000f877523f): kobject_uevent_env
kobject: 'loop1' (000000007d84fd2a): fill_kobj_path: path = '/devices/virtual/block/loop1'
kobject: 'loop3' (00000000608c6abe): kobject_uevent_env
kobject: '0:53' (00000000f877523f): fill_kobj_path: path = '/devices/virtual/bdi/0:53'
kobject: 'loop3' (00000000608c6abe): fill_kobj_path: path = '/devices/virtual/block/loop3'
kobject: 'loop5' (00000000879ba919): kobject_uevent_env
kobject: 'loop5' (00000000879ba919): fill_kobj_path: path = '/devices/virtual/block/loop5'
kobject: '0:53' (00000000f877523f): kobject_uevent_env
kobject: '0:53' (00000000f877523f): fill_kobj_path: path = '/devices/virtual/bdi/0:53'
kobject: '0:53' (00000000f877523f): kobject_cleanup, parent           (null)
kobject: '0:53' (00000000f877523f): calling ktype release
kobject: 'loop5' (00000000879ba919): kobject_uevent_env
kobject: '0:53': free name
kobject: 'loop5' (00000000879ba919): fill_kobj_path: path = '/devices/virtual/block/loop5'
kobject: 'loop2' (00000000c6fa5184): kobject_uevent_env
kobject: '0:53' (00000000cb19ced7): kobject_add_internal: parent: 'bdi', set: 'devices'
kobject: 'loop2' (00000000c6fa5184): fill_kobj_path: path = '/devices/virtual/block/loop2'
kobject: 'loop4' (00000000a2c97560): kobject_uevent_env
kobject: '0:53' (00000000cb19ced7): kobject_uevent_env
kobject: 'loop4' (00000000a2c97560): fill_kobj_path: path = '/devices/virtual/block/loop4'
kobject: '0:53' (00000000cb19ced7): fill_kobj_path: path = '/devices/virtual/bdi/0:53'
kobject: 'loop1' (000000007d84fd2a): kobject_uevent_env
kobject: 'loop1' (000000007d84fd2a): fill_kobj_path: path = '/devices/virtual/block/loop1'
kobject: 'loop4' (00000000a2c97560): kobject_uevent_env
kobject: 'loop4' (00000000a2c97560): fill_kobj_path: path = '/devices/virtual/block/loop4'
kobject: 'loop0' (000000003653efc2): kobject_uevent_env
kobject: 'loop0' (000000003653efc2): fill_kobj_path: path = '/devices/virtual/block/loop0'
kobject: 'loop5' (00000000879ba919): kobject_uevent_env
kobject: 'loop5' (00000000879ba919): fill_kobj_path: path = '/devices/virtual/block/loop5'
kobject: 'loop3' (00000000608c6abe): kobject_uevent_env
kobject: 'loop3' (00000000608c6abe): fill_kobj_path: path = '/devices/virtual/block/loop3'
kobject: 'loop4' (00000000a2c97560): kobject_uevent_env
kobject: 'loop4' (00000000a2c97560): fill_kobj_path: path = '/devices/virtual/block/loop4'
kobject: 'loop5' (00000000879ba919): kobject_uevent_env
kobject: 'loop5' (00000000879ba919): fill_kobj_path: path = '/devices/virtual/block/loop5'
kobject: 'loop1' (000000007d84fd2a): kobject_uevent_env
kobject: 'loop1' (000000007d84fd2a): fill_kobj_path: path = '/devices/virtual/block/loop1'
kobject: 'loop0' (000000003653efc2): kobject_uevent_env
kobject: 'loop0' (000000003653efc2): fill_kobj_path: path = '/devices/virtual/block/loop0'
kobject: '0:53' (00000000cb19ced7): kobject_uevent_env
kobject: '0:53' (00000000cb19ced7): fill_kobj_path: path = '/devices/virtual/bdi/0:53'
kobject: 'loop4' (00000000a2c97560): kobject_uevent_env
kobject: '0:53' (00000000cb19ced7): kobject_cleanup, parent           (null)
kobject: 'loop4' (00000000a2c97560): fill_kobj_path: path = '/devices/virtual/block/loop4'
kobject: '0:53' (00000000cb19ced7): calling ktype release
kobject: 'loop5' (00000000879ba919): kobject_uevent_env
kobject: '0:53': free name
kobject: 'loop5' (00000000879ba919): fill_kobj_path: path = '/devices/virtual/block/loop5'
kobject: 'loop3' (00000000608c6abe): kobject_uevent_env
kobject: 'loop3' (00000000608c6abe): fill_kobj_path: path = '/devices/virtual/block/loop3'
kobject: 'loop0' (000000003653efc2): kobject_uevent_env
kobject: 'loop0' (000000003653efc2): fill_kobj_path: path = '/devices/virtual/block/loop0'
kobject: '0:53' (00000000c3b381c3): kobject_add_internal: parent: 'bdi', set: 'devices'
kobject: 'loop2' (00000000c6fa5184): kobject_uevent_env
kobject: 'loop2' (00000000c6fa5184): fill_kobj_path: path = '/devices/virtual/block/loop2'
kobject: '0:53' (00000000c3b381c3): kobject_uevent_env
kobject: 'loop1' (000000007d84fd2a): kobject_uevent_env
kobject: '0:53' (00000000c3b381c3): fill_kobj_path: path = '/devices/virtual/bdi/0:53'
kobject: 'loop1' (000000007d84fd2a): fill_kobj_path: path = '/devices/virtual/block/loop1'
kobject: 'loop4' (00000000a2c97560): kobject_uevent_env
kobject: 'loop4' (00000000a2c97560): fill_kobj_path: path = '/devices/virtual/block/loop4'
kobject: 'loop0' (000000003653efc2): kobject_uevent_env
kobject: 'loop0' (000000003653efc2): fill_kobj_path: path = '/devices/virtual/block/loop0'
kobject: 'loop1' (000000007d84fd2a): kobject_uevent_env
kobject: 'loop1' (000000007d84fd2a): fill_kobj_path: path = '/devices/virtual/block/loop1'
kobject: 'loop3' (00000000608c6abe): kobject_uevent_env
kobject: 'loop3' (00000000608c6abe): fill_kobj_path: path = '/devices/virtual/block/loop3'
kobject: '0:53' (00000000c3b381c3): kobject_uevent_env
kobject: '0:53' (00000000c3b381c3): fill_kobj_path: path = '/devices/virtual/bdi/0:53'
kobject: '0:53' (00000000c3b381c3): kobject_cleanup, parent           (null)
kobject: '0:53' (00000000c3b381c3): calling ktype release
kobject: '0:53': free name
kobject: 'loop2' (00000000c6fa5184): kobject_uevent_env
kobject: 'loop2' (00000000c6fa5184): fill_kobj_path: path = '/devices/virtual/block/loop2'
kobject: 'loop4' (00000000a2c97560): kobject_uevent_env
kobject: 'loop4' (00000000a2c97560): fill_kobj_path: path = '/devices/virtual/block/loop4'
kobject: '0:53' (00000000fad874f8): kobject_add_internal: parent: 'bdi', set: 'devices'
kobject: 'loop5' (00000000879ba919): kobject_uevent_env
kobject: 'loop5' (00000000879ba919): fill_kobj_path: path = '/devices/virtual/block/loop5'
kobject: '0:53' (00000000fad874f8): kobject_uevent_env
kobject: 'loop3' (00000000608c6abe): kobject_uevent_env
kobject: 'loop3' (00000000608c6abe): fill_kobj_path: path = '/devices/virtual/block/loop3'
kobject: '0:53' (00000000fad874f8): fill_kobj_path: path = '/devices/virtual/bdi/0:53'
kobject: 'loop0' (000000003653efc2): kobject_uevent_env
kobject: 'loop0' (000000003653efc2): fill_kobj_path: path = '/devices/virtual/block/loop0'
kobject: 'loop1' (000000007d84fd2a): kobject_uevent_env
kobject: 'loop1' (000000007d84fd2a): fill_kobj_path: path = '/devices/virtual/block/loop1'
kobject: 'loop4' (00000000a2c97560): kobject_uevent_env
kobject: 'loop4' (00000000a2c97560): fill_kobj_path: path = '/devices/virtual/block/loop4'
kobject: 'loop1' (000000007d84fd2a): kobject_uevent_env
kobject: 'loop1' (000000007d84fd2a): fill_kobj_path: path = '/devices/virtual/block/loop1'
kobject: 'loop5' (00000000879ba919): kobject_uevent_env
kobject: 'loop5' (00000000879ba919): fill_kobj_path: path = '/devices/virtual/block/loop5'
kobject: 'loop0' (000000003653efc2): kobject_uevent_env
kobject: 'loop0' (000000003653efc2): fill_kobj_path: path = '/devices/virtual/block/loop0'
kobject: '0:53' (00000000fad874f8): kobject_uevent_env
kobject: '0:53' (00000000fad874f8): fill_kobj_path: path = '/devices/virtual/bdi/0:53'
kobject: 'loop4' (00000000a2c97560): kobject_uevent_env
kobject: 'loop4' (00000000a2c97560): fill_kobj_path: path = '/devices/virtual/block/loop4'
kobject: '0:53' (00000000fad874f8): kobject_cleanup, parent           (null)
kobject: '0:53' (00000000fad874f8): calling ktype release
kobject: 'loop0' (000000003653efc2): kobject_uevent_env
kobject: 'loop0' (000000003653efc2): fill_kobj_path: path = '/devices/virtual/block/loop0'
kobject: '0:53': free name
kobject: 'loop5' (00000000879ba919): kobject_uevent_env
kobject: 'loop5' (00000000879ba919): fill_kobj_path: path = '/devices/virtual/block/loop5'
kobject: 'loop1' (000000007d84fd2a): kobject_uevent_env
kobject: '0:53' (00000000c1eab4fa): kobject_add_internal: parent: 'bdi', set: 'devices'
kobject: 'loop1' (000000007d84fd2a): fill_kobj_path: path = '/devices/virtual/block/loop1'
kobject: '0:53' (00000000c1eab4fa): kobject_uevent_env
kobject: 'loop3' (00000000608c6abe): kobject_uevent_env
kobject: '0:53' (00000000c1eab4fa): fill_kobj_path: path = '/devices/virtual/bdi/0:53'
kobject: 'loop3' (00000000608c6abe): fill_kobj_path: path = '/devices/virtual/block/loop3'
kobject: 'loop5' (00000000879ba919): kobject_uevent_env
kobject: 'loop5' (00000000879ba919): fill_kobj_path: path = '/devices/virtual/block/loop5'
kobject: 'loop2' (00000000c6fa5184): kobject_uevent_env
kobject: '0:53' (00000000c1eab4fa): kobject_uevent_env
kobject: 'loop2' (00000000c6fa5184): fill_kobj_path: path = '/devices/virtual/block/loop2'
kobject: '0:53' (00000000c1eab4fa): fill_kobj_path: path = '/devices/virtual/bdi/0:53'
kobject: 'loop0' (000000003653efc2): kobject_uevent_env
kobject: '0:53' (00000000c1eab4fa): kobject_cleanup, parent           (null)
kobject: 'loop0' (000000003653efc2): fill_kobj_path: path = '/devices/virtual/block/loop0'
kobject: '0:53' (00000000c1eab4fa): calling ktype release
kobject: 'loop1' (000000007d84fd2a): kobject_uevent_env
kobject: '0:53': free name
kobject: 'loop1' (000000007d84fd2a): fill_kobj_path: path = '/devices/virtual/block/loop1'
kobject: 'loop3' (00000000608c6abe): kobject_uevent_env
kobject: 'loop3' (00000000608c6abe): fill_kobj_path: path = '/devices/virtual/block/loop3'
kobject: 'loop4' (00000000a2c97560): kobject_uevent_env
kobject: 'loop4' (00000000a2c97560): fill_kobj_path: path = '/devices/virtual/block/loop4'
kobject: 'loop5' (00000000879ba919): kobject_uevent_env
kobject: 'loop5' (00000000879ba919): fill_kobj_path: path = '/devices/virtual/block/loop5'
kobject: 'loop3' (00000000608c6abe): kobject_uevent_env
kobject: 'loop3' (00000000608c6abe): fill_kobj_path: path = '/devices/virtual/block/loop3'
kobject: 'loop1' (000000007d84fd2a): kobject_uevent_env
kobject: 'loop1' (000000007d84fd2a): fill_kobj_path: path = '/devices/virtual/block/loop1'
kobject: 'loop2' (00000000c6fa5184): kobject_uevent_env
kobject: 'loop2' (00000000c6fa5184): fill_kobj_path: path = '/devices/virtual/block/loop2'
kobject: 'loop5' (00000000879ba919): kobject_uevent_env
kobject: '0:53' (00000000c144a9de): kobject_add_internal: parent: 'bdi', set: 'devices'
kobject: 'loop5' (00000000879ba919): fill_kobj_path: path = '/devices/virtual/block/loop5'
kobject: 'loop4' (00000000a2c97560): kobject_uevent_env
kobject: '0:53' (00000000c144a9de): kobject_uevent_env
kobject: 'loop4' (00000000a2c97560): fill_kobj_path: path = '/devices/virtual/block/loop4'
kobject: 'loop1' (000000007d84fd2a): kobject_uevent_env
kobject: '0:53' (00000000c144a9de): fill_kobj_path: path = '/devices/virtual/bdi/0:53'
kobject: 'loop1' (000000007d84fd2a): fill_kobj_path: path = '/devices/virtual/block/loop1'
kobject: 'loop0' (000000003653efc2): kobject_uevent_env
kobject: 'loop0' (000000003653efc2): fill_kobj_path: path = '/devices/virtual/block/loop0'
kobject: 'loop4' (00000000a2c97560): kobject_uevent_env
kobject: 'loop4' (00000000a2c97560): fill_kobj_path: path = '/devices/virtual/block/loop4'
kobject: 'loop3' (00000000608c6abe): kobject_uevent_env
kobject: 'loop3' (00000000608c6abe): fill_kobj_path: path = '/devices/virtual/block/loop3'
kobject: 'loop1' (000000007d84fd2a): kobject_uevent_env
kobject: 'loop1' (000000007d84fd2a): fill_kobj_path: path = '/devices/virtual/block/loop1'
kobject: 'loop0' (000000003653efc2): kobject_uevent_env
kobject: 'loop0' (000000003653efc2): fill_kobj_path: path = '/devices/virtual/block/loop0'
kobject: 'loop3' (00000000608c6abe): kobject_uevent_env
kobject: 'loop3' (00000000608c6abe): fill_kobj_path: path = '/devices/virtual/block/loop3'
kobject: '0:53' (00000000c144a9de): kobject_uevent_env
kobject: '0:53' (00000000c144a9de): fill_kobj_path: path = '/devices/virtual/bdi/0:53'
kobject: 'loop0' (000000003653efc2): kobject_uevent_env
kobject: 'loop0' (000000003653efc2): fill_kobj_path: path = '/devices/virtual/block/loop0'
kobject: '0:53' (00000000c144a9de): kobject_cleanup, parent           (null)
kobject: 'loop1' (000000007d84fd2a): kobject_uevent_env
kobject: 'loop1' (000000007d84fd2a): fill_kobj_path: path = '/devices/virtual/block/loop1'
kobject: '0:53' (00000000c144a9de): calling ktype release
kobject: '0:53': free name
kobject: 'loop3' (00000000608c6abe): kobject_uevent_env
kobject: 'loop3' (00000000608c6abe): fill_kobj_path: path = '/devices/virtual/block/loop3'
kobject: '0:53' (00000000ad9ffdbd): kobject_add_internal: parent: 'bdi', set: 'devices'
kobject: 'loop4' (00000000a2c97560): kobject_uevent_env
kobject: '0:53' (00000000ad9ffdbd): kobject_uevent_env
kobject: 'loop4' (00000000a2c97560): fill_kobj_path: path = '/devices/virtual/block/loop4'
kobject: 'loop5' (00000000879ba919): kobject_uevent_env
kobject: 'loop5' (00000000879ba919): fill_kobj_path: path = '/devices/virtual/block/loop5'
kobject: '0:53' (00000000ad9ffdbd): fill_kobj_path: path = '/devices/virtual/bdi/0:53'
kobject: '0:54' (00000000b4628ef1): kobject_add_internal: parent: 'bdi', set: 'devices'
kobject: 'loop2' (00000000c6fa5184): kobject_uevent_env
kobject: '0:54' (00000000b4628ef1): kobject_uevent_env
kobject: 'loop2' (00000000c6fa5184): fill_kobj_path: path = '/devices/virtual/block/loop2'
kobject: '0:54' (00000000b4628ef1): fill_kobj_path: path = '/devices/virtual/bdi/0:54'
kobject: 'loop3' (00000000608c6abe): kobject_uevent_env
kobject: 'loop3' (00000000608c6abe): fill_kobj_path: path = '/devices/virtual/block/loop3'
kobject: 'loop5' (00000000879ba919): kobject_uevent_env
kobject: 'loop5' (00000000879ba919): fill_kobj_path: path = '/devices/virtual/block/loop5'
kobject: '0:53' (00000000ad9ffdbd): kobject_uevent_env
kobject: 'loop0' (000000003653efc2): kobject_uevent_env
kobject: '0:53' (00000000ad9ffdbd): fill_kobj_path: path = '/devices/virtual/bdi/0:53'
kobject: 'loop0' (000000003653efc2): fill_kobj_path: path = '/devices/virtual/block/loop0'
kobject: '0:53' (00000000ad9ffdbd): kobject_cleanup, parent           (null)
kobject: 'loop3' (00000000608c6abe): kobject_uevent_env
kobject: '0:54' (00000000b4628ef1): kobject_uevent_env
kobject: 'loop3' (00000000608c6abe): fill_kobj_path: path = '/devices/virtual/block/loop3'
kobject: '0:53' (00000000ad9ffdbd): calling ktype release
kobject: 'loop5' (00000000879ba919): kobject_uevent_env
kobject: '0:54' (00000000b4628ef1): fill_kobj_path: path = '/devices/virtual/bdi/0:54'
kobject: 'loop5' (00000000879ba919): fill_kobj_path: path = '/devices/virtual/block/loop5'
kobject: '0:53': free name
kobject: 'loop0' (000000003653efc2): kobject_uevent_env
kobject: '0:54' (00000000b4628ef1): kobject_cleanup, parent           (null)
kobject: 'loop0' (000000003653efc2): fill_kobj_path: path = '/devices/virtual/block/loop0'
kobject: '0:54' (00000000b4628ef1): calling ktype release
kobject: '0:54': free name
kobject: 'loop4' (00000000a2c97560): kobject_uevent_env
kobject: 'loop4' (00000000a2c97560): fill_kobj_path: path = '/devices/virtual/block/loop4'
kobject: 'loop2' (00000000c6fa5184): kobject_uevent_env
kobject: 'loop2' (00000000c6fa5184): fill_kobj_path: path = '/devices/virtual/block/loop2'
kobject: 'loop3' (00000000608c6abe): kobject_uevent_env
kobject: '0:53' (00000000b8cd52b1): kobject_add_internal: parent: 'bdi', set: 'devices'
kobject: 'loop3' (00000000608c6abe): fill_kobj_path: path = '/devices/virtual/block/loop3'
kobject: '0:53' (00000000b8cd52b1): kobject_uevent_env
kobject: 'loop0' (000000003653efc2): kobject_uevent_env
kobject: '0:53' (00000000b8cd52b1): fill_kobj_path: path = '/devices/virtual/bdi/0:53'
kobject: '0:54' (0000000091b5c425): kobject_add_internal: parent: 'bdi', set: 'devices'
kobject: 'loop0' (000000003653efc2): fill_kobj_path: path = '/devices/virtual/block/loop0'
kobject: 'loop1' (000000007d84fd2a): kobject_uevent_env
kobject: '0:54' (0000000091b5c425): kobject_uevent_env
kobject: 'loop1' (000000007d84fd2a): fill_kobj_path: path = '/devices/virtual/block/loop1'
kobject: '0:54' (0000000091b5c425): fill_kobj_path: path = '/devices/virtual/bdi/0:54'
kobject: 'loop5' (00000000879ba919): kobject_uevent_env
kobject: '0:53' (00000000b8cd52b1): kobject_uevent_env
kobject: 'loop5' (00000000879ba919): fill_kobj_path: path = '/devices/virtual/block/loop5'
kobject: '0:53' (00000000b8cd52b1): fill_kobj_path: path = '/devices/virtual/bdi/0:53'
kobject: 'loop0' (000000003653efc2): kobject_uevent_env
kobject: '0:53' (00000000b8cd52b1): kobject_cleanup, parent           (null)
kobject: 'loop0' (000000003653efc2): fill_kobj_path: path = '/devices/virtual/block/loop0'
kobject: '0:53' (00000000b8cd52b1): calling ktype release
kobject: 'loop5' (00000000879ba919): kobject_uevent_env
kobject: '0:53': free name
kobject: 'loop5' (00000000879ba919): fill_kobj_path: path = '/devices/virtual/block/loop5'
kobject: 'loop1' (000000007d84fd2a): kobject_uevent_env
kobject: 'loop1' (000000007d84fd2a): fill_kobj_path: path = '/devices/virtual/block/loop1'
kobject: 'loop0' (000000003653efc2): kobject_uevent_env
kobject: 'loop0' (000000003653efc2): fill_kobj_path: path = '/devices/virtual/block/loop0'
kobject: 'loop3' (00000000608c6abe): kobject_uevent_env
kobject: 'loop3' (00000000608c6abe): fill_kobj_path: path = '/devices/virtual/block/loop3'
kobject: 'loop4' (00000000a2c97560): kobject_uevent_env
kobject: 'loop4' (00000000a2c97560): fill_kobj_path: path = '/devices/virtual/block/loop4'
kobject: '0:54' (0000000091b5c425): kobject_uevent_env
kobject: '0:54' (0000000091b5c425): fill_kobj_path: path = '/devices/virtual/bdi/0:54'
kobject: '0:54' (0000000091b5c425): kobject_cleanup, parent           (null)
kobject: 'loop3' (00000000608c6abe): kobject_uevent_env
kobject: '0:54' (0000000091b5c425): calling ktype release
kobject: 'loop3' (00000000608c6abe): fill_kobj_path: path = '/devices/virtual/block/loop3'
kobject: 'loop0' (000000003653efc2): kobject_uevent_env
kobject: '0:53' (000000006555606b): kobject_add_internal: parent: 'bdi', set: 'devices'
kobject: '0:53' (000000006555606b): kobject_uevent_env
kobject: 'loop0' (000000003653efc2): fill_kobj_path: path = '/devices/virtual/block/loop0'
kobject: '0:54': free name
kobject: '0:53' (000000006555606b): fill_kobj_path: path = '/devices/virtual/bdi/0:53'
kobject: 'loop1' (000000007d84fd2a): kobject_uevent_env
kobject: 'loop1' (000000007d84fd2a): fill_kobj_path: path = '/devices/virtual/block/loop1'
kobject: '0:55' (000000000776d548): kobject_add_internal: parent: 'bdi', set: 'devices'
kobject: 'loop2' (00000000c6fa5184): kobject_uevent_env
kobject: '0:54' (00000000b6773e6f): kobject_add_internal: parent: 'bdi', set: 'devices'
kobject: 'loop2' (00000000c6fa5184): fill_kobj_path: path = '/devices/virtual/block/loop2'
kobject: '0:53' (000000006555606b): kobject_uevent_env
kobject: 'loop5' (00000000879ba919): kobject_uevent_env
kobject: 'loop5' (00000000879ba919): fill_kobj_path: path = '/devices/virtual/block/loop5'
kobject: '0:54' (00000000b6773e6f): kobject_uevent_env
kobject: 'loop1' (000000007d84fd2a): kobject_uevent_env
kobject: '0:55' (000000000776d548): kobject_uevent_env
kobject: 'loop1' (000000007d84fd2a): fill_kobj_path: path = '/devices/virtual/block/loop1'
kobject: '0:55' (000000000776d548): fill_kobj_path: path = '/devices/virtual/bdi/0:55'
kobject: '0:53' (000000006555606b): fill_kobj_path: path = '/devices/virtual/bdi/0:53'
kobject: '0:54' (00000000b6773e6f): fill_kobj_path: path = '/devices/virtual/bdi/0:54'
kobject: '0:53' (000000006555606b): kobject_cleanup, parent           (null)
kobject: 'loop3' (00000000608c6abe): kobject_uevent_env
kobject: 'loop3' (00000000608c6abe): fill_kobj_path: path = '/devices/virtual/block/loop3'
kobject: '0:53' (000000006555606b): calling ktype release
kobject: 'loop1' (000000007d84fd2a): kobject_uevent_env
kobject: '0:55' (000000000776d548): kobject_uevent_env
kobject: 'loop1' (000000007d84fd2a): fill_kobj_path: path = '/devices/virtual/block/loop1'
kobject: '0:53': free name
kobject: 'loop5' (00000000879ba919): kobject_uevent_env
kobject: 'loop5' (00000000879ba919): fill_kobj_path: path = '/devices/virtual/block/loop5'
kobject: '0:55' (000000000776d548): fill_kobj_path: path = '/devices/virtual/bdi/0:55'
kobject: '0:55' (000000000776d548): kobject_cleanup, parent           (null)
kobject: '0:55' (000000000776d548): calling ktype release
kobject: '0:55': free name
kobject: 'loop4' (00000000a2c97560): kobject_uevent_env
kobject: 'loop4' (00000000a2c97560): fill_kobj_path: path = '/devices/virtual/block/loop4'
kobject: 'loop0' (000000003653efc2): kobject_uevent_env
kobject: 'loop0' (000000003653efc2): fill_kobj_path: path = '/devices/virtual/block/loop0'
kobject: '0:54' (00000000b6773e6f): kobject_uevent_env
kobject: '0:54' (00000000b6773e6f): fill_kobj_path: path = '/devices/virtual/bdi/0:54'
kobject: '0:54' (00000000b6773e6f): kobject_cleanup, parent           (null)
kobject: 'loop3' (00000000608c6abe): kobject_uevent_env
kobject: '0:54' (00000000b6773e6f): calling ktype release
kobject: 'loop3' (00000000608c6abe): fill_kobj_path: path = '/devices/virtual/block/loop3'
kobject: '0:53' (0000000072ff8c82): kobject_add_internal: parent: 'bdi', set: 'devices'
kobject: '0:55' (00000000916dcd60): kobject_add_internal: parent: 'bdi', set: 'devices'
kobject: '0:54': free name
kobject: '0:53' (0000000072ff8c82): kobject_uevent_env
kobject: 'loop2' (00000000c6fa5184): kobject_uevent_env
kobject: '0:53' (0000000072ff8c82): fill_kobj_path: path = '/devices/virtual/bdi/0:53'
kobject: '0:55' (00000000916dcd60): kobject_uevent_env
kobject: 'loop2' (00000000c6fa5184): fill_kobj_path: path = '/devices/virtual/block/loop2'
kobject: '0:55' (00000000916dcd60): fill_kobj_path: path = '/devices/virtual/bdi/0:55'
kobject: 'loop1' (000000007d84fd2a): kobject_uevent_env
kobject: 'loop1' (000000007d84fd2a): fill_kobj_path: path = '/devices/virtual/block/loop1'
kobject: '0:54' (000000004a8b529c): kobject_add_internal: parent: 'bdi', set: 'devices'
kobject: 'loop5' (00000000879ba919): kobject_uevent_env
kobject: '0:54' (000000004a8b529c): kobject_uevent_env
kobject: 'loop5' (00000000879ba919): fill_kobj_path: path = '/devices/virtual/block/loop5'
kobject: '0:54' (000000004a8b529c): fill_kobj_path: path = '/devices/virtual/bdi/0:54'
kobject: 'loop3' (00000000608c6abe): kobject_uevent_env
kobject: 'loop3' (00000000608c6abe): fill_kobj_path: path = '/devices/virtual/block/loop3'
kobject: 'loop1' (000000007d84fd2a): kobject_uevent_env
kobject: 'loop1' (000000007d84fd2a): fill_kobj_path: path = '/devices/virtual/block/loop1'
kobject: '0:54' (000000004a8b529c): kobject_uevent_env
kobject: 'loop5' (00000000879ba919): kobject_uevent_env
kobject: '0:54' (000000004a8b529c): fill_kobj_path: path = '/devices/virtual/bdi/0:54'
kobject: '0:54' (000000004a8b529c): kobject_cleanup, parent           (null)
kobject: 'loop5' (00000000879ba919): fill_kobj_path: path = '/devices/virtual/block/loop5'
kobject: '0:54' (000000004a8b529c): calling ktype release
kobject: '0:54': free name
kobject: 'loop3' (00000000608c6abe): kobject_uevent_env
kobject: 'loop3' (00000000608c6abe): fill_kobj_path: path = '/devices/virtual/block/loop3'
kobject: 'loop5' (00000000879ba919): kobject_uevent_env
kobject: 'loop5' (00000000879ba919): fill_kobj_path: path = '/devices/virtual/block/loop5'
kobject: 'loop1' (000000007d84fd2a): kobject_uevent_env
kobject: 'loop1' (000000007d84fd2a): fill_kobj_path: path = '/devices/virtual/block/loop1'
kobject: 'loop3' (00000000608c6abe): kobject_uevent_env
kobject: 'loop3' (00000000608c6abe): fill_kobj_path: path = '/devices/virtual/block/loop3'
kobject: 'loop1' (000000007d84fd2a): kobject_uevent_env