Web lists-archives.com

possible deadlock in pipe_lock (2)




Hello,

syzbot found the following crash on:

HEAD commit:    74e96711e337 Merge tag 'platform-drivers-x86-v5.0-2' of gi..
git tree:       upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=11225b27400000
kernel config:  https://syzkaller.appspot.com/x/.config?x=8f00801d7b7c4fe6
dashboard link: https://syzkaller.appspot.com/bug?extid=31d8b84465a7cbfd8515
compiler:       gcc (GCC) 9.0.0 20181231 (experimental)

Unfortunately, I don't have any reproducer for this crash yet.

IMPORTANT: if you fix the bug, please add the following tag to the commit:
Reported-by: syzbot+31d8b84465a7cbfd8515@xxxxxxxxxxxxxxxxxxxxxxxxx

kvm [15406]: vcpu0, guest rIP: 0xfff0 kvm_set_msr_common: MSR_IA32_DEBUGCTLMSR 0x3, nop
======================================================
WARNING: possible circular locking dependency detected
5.0.0-rc5+ #63 Not tainted
------------------------------------------------------
overlayfs: filesystem on './file0' not supported as upperdir
syz-executor.2/15417 is trying to acquire lock:
00000000dcbcd11f (&pipe->mutex/1){+.+.}, at: pipe_lock_nested fs/pipe.c:62 [inline] 00000000dcbcd11f (&pipe->mutex/1){+.+.}, at: pipe_lock+0x6e/0x80 fs/pipe.c:70

but task is already holding lock:
kobject: 'loop0' (00000000d9cc93a0): kobject_uevent_env
00000000c13db9a0 (sb_writers#3){.+.+}, at: file_start_write include/linux/fs.h:2816 [inline] 00000000c13db9a0 (sb_writers#3){.+.+}, at: do_splice+0xceb/0x1330 fs/splice.c:1151

which lock already depends on the new lock.


the existing dependency chain (in reverse order) is:
kobject: 'loop0' (00000000d9cc93a0): fill_kobj_path: path = '/devices/virtual/block/loop0'

-> #2 (sb_writers#3){.+.+}:
percpu_down_read_preempt_disable include/linux/percpu-rwsem.h:36 [inline]
       percpu_down_read include/linux/percpu-rwsem.h:59 [inline]
       __sb_start_write+0x20b/0x360 fs/super.c:1389
       sb_start_write include/linux/fs.h:1603 [inline]
       mnt_want_write+0x3f/0xc0 fs/namespace.c:357
       ovl_want_write+0x76/0xa0 fs/overlayfs/util.c:24
       ovl_setattr+0xdd/0x950 fs/overlayfs/inode.c:30
       notify_change+0xad9/0xfb0 fs/attr.c:334
kobject: 'loop5' (00000000a501efc5): kobject_uevent_env
       do_truncate+0x158/0x220 fs/open.c:63
       handle_truncate fs/namei.c:3008 [inline]
       do_last fs/namei.c:3424 [inline]
       path_openat+0x2cc6/0x4690 fs/namei.c:3534
       do_filp_open+0x1a1/0x280 fs/namei.c:3564
       do_sys_open+0x3fe/0x5d0 fs/open.c:1063
       __do_sys_openat fs/open.c:1090 [inline]
       __se_sys_openat fs/open.c:1084 [inline]
       __x64_sys_openat+0x9d/0x100 fs/open.c:1084
       do_syscall_64+0x103/0x610 arch/x86/entry/common.c:290
kobject: 'loop5' (00000000a501efc5): fill_kobj_path: path = '/devices/virtual/block/loop5'
       entry_SYSCALL_64_after_hwframe+0x49/0xbe

-> #1 (&ovl_i_mutex_key[depth]){+.+.}:
       down_write+0x38/0x90 kernel/locking/rwsem.c:70
       inode_lock include/linux/fs.h:757 [inline]
       ovl_write_iter+0x148/0xc20 fs/overlayfs/file.c:231
       call_write_iter include/linux/fs.h:1863 [inline]
       new_sync_write fs/read_write.c:474 [inline]
       __vfs_write+0x613/0x8e0 fs/read_write.c:487
kobject: 'loop4' (000000009e2b886d): kobject_uevent_env
       __kernel_write+0x110/0x3b0 fs/read_write.c:506
       write_pipe_buf+0x15d/0x1f0 fs/splice.c:797
       splice_from_pipe_feed fs/splice.c:503 [inline]
       __splice_from_pipe+0x39a/0x7e0 fs/splice.c:627
       splice_from_pipe+0x108/0x170 fs/splice.c:662
       default_file_splice_write+0x3c/0x90 fs/splice.c:809
       do_splice_from fs/splice.c:851 [inline]
       do_splice+0x644/0x1330 fs/splice.c:1152
       __do_sys_splice fs/splice.c:1419 [inline]
       __se_sys_splice fs/splice.c:1399 [inline]
       __x64_sys_splice+0x2c6/0x330 fs/splice.c:1399
kobject: 'loop4' (000000009e2b886d): fill_kobj_path: path = '/devices/virtual/block/loop4'
       do_syscall_64+0x103/0x610 arch/x86/entry/common.c:290
       entry_SYSCALL_64_after_hwframe+0x49/0xbe

-> #0 (&pipe->mutex/1){+.+.}:
       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_nested+0x16/0x20 kernel/locking/mutex.c:1087
       pipe_lock_nested fs/pipe.c:62 [inline]
       pipe_lock+0x6e/0x80 fs/pipe.c:70
       iter_file_splice_write+0x18b/0xbe0 fs/splice.c:700
       do_splice_from fs/splice.c:851 [inline]
       do_splice+0x644/0x1330 fs/splice.c:1152
       __do_sys_splice fs/splice.c:1419 [inline]
       __se_sys_splice fs/splice.c:1399 [inline]
       __x64_sys_splice+0x2c6/0x330 fs/splice.c:1399
       do_syscall_64+0x103/0x610 arch/x86/entry/common.c:290
       entry_SYSCALL_64_after_hwframe+0x49/0xbe

other info that might help us debug this:

Chain exists of:
  &pipe->mutex/1 --> &ovl_i_mutex_key[depth] --> sb_writers#3

 Possible unsafe locking scenario:

       CPU0                    CPU1
       ----                    ----
  lock(sb_writers#3);
                               lock(&ovl_i_mutex_key[depth]);
                               lock(sb_writers#3);
  lock(&pipe->mutex/1);

 *** DEADLOCK ***

1 lock held by syz-executor.2/15417:
#0: 00000000c13db9a0 (sb_writers#3){.+.+}, at: file_start_write include/linux/fs.h:2816 [inline] #0: 00000000c13db9a0 (sb_writers#3){.+.+}, at: do_splice+0xceb/0x1330 fs/splice.c:1151

stack backtrace:
CPU: 1 PID: 15417 Comm: syz-executor.2 Not tainted 5.0.0-rc5+ #63
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_nested+0x16/0x20 kernel/locking/mutex.c:1087
 pipe_lock_nested fs/pipe.c:62 [inline]
 pipe_lock+0x6e/0x80 fs/pipe.c:70
 iter_file_splice_write+0x18b/0xbe0 fs/splice.c:700
 do_splice_from fs/splice.c:851 [inline]
 do_splice+0x644/0x1330 fs/splice.c:1152
 __do_sys_splice fs/splice.c:1419 [inline]
 __se_sys_splice fs/splice.c:1399 [inline]
 __x64_sys_splice+0x2c6/0x330 fs/splice.c:1399
 do_syscall_64+0x103/0x610 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x457e39
Code: ad b8 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 7b b8 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007fe58b4bac78 EFLAGS: 00000246 ORIG_RAX: 0000000000000113
RAX: ffffffffffffffda RBX: 0000000000000006 RCX: 0000000000457e39
RDX: 0000000000000007 RSI: 0000000000000000 RDI: 0000000000000005
RBP: 000000000073bfa0 R08: 000100000000ffe0 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fe58b4bb6d4
R13: 00000000004c6c00 R14: 00000000004db710 R15: 00000000ffffffff
protocol 88fb is buggy, dev hsr_slave_0
protocol 88fb is buggy, dev hsr_slave_1
protocol 88fb is buggy, dev hsr_slave_0
protocol 88fb is buggy, dev hsr_slave_1
kobject: 'kvm' (0000000085e711ac): kobject_uevent_env
kobject: 'kvm' (0000000085e711ac): fill_kobj_path: path = '/devices/virtual/misc/kvm'
kobject: 'loop1' (0000000079c3ae74): kobject_uevent_env
kobject: 'loop1' (0000000079c3ae74): fill_kobj_path: path = '/devices/virtual/block/loop1'
kobject: 'kvm' (0000000085e711ac): kobject_uevent_env
kobject: 'kvm' (0000000085e711ac): fill_kobj_path: path = '/devices/virtual/misc/kvm'
kobject: 'loop0' (00000000d9cc93a0): kobject_uevent_env
kobject: 'loop0' (00000000d9cc93a0): fill_kobj_path: path = '/devices/virtual/block/loop0'
kobject: 'kvm' (0000000085e711ac): kobject_uevent_env
kobject: 'loop5' (00000000a501efc5): kobject_uevent_env
kvm [15421]: vcpu0, guest rIP: 0xfff0 kvm_set_msr_common: MSR_IA32_DEBUGCTLMSR 0x3, nop kobject: 'loop5' (00000000a501efc5): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'kvm' (0000000085e711ac): fill_kobj_path: path = '/devices/virtual/misc/kvm'
kobject: 'loop2' (00000000daaf6648): kobject_uevent_env
kobject: 'kvm' (0000000085e711ac): kobject_uevent_env
kobject: 'loop2' (00000000daaf6648): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'kvm' (0000000085e711ac): fill_kobj_path: path = '/devices/virtual/misc/kvm'
kobject: 'loop3' (000000009dce83ac): kobject_uevent_env
kobject: 'loop3' (000000009dce83ac): fill_kobj_path: path = '/devices/virtual/block/loop3'
overlayfs: filesystem on './file0' not supported as upperdir
kobject: 'loop4' (000000009e2b886d): kobject_uevent_env
kobject: 'loop4' (000000009e2b886d): fill_kobj_path: path = '/devices/virtual/block/loop4'
kobject: 'kvm' (0000000085e711ac): kobject_uevent_env
kobject: 'kvm' (0000000085e711ac): fill_kobj_path: path = '/devices/virtual/misc/kvm'
kobject: 'loop5' (00000000a501efc5): kobject_uevent_env
kobject: 'loop5' (00000000a501efc5): fill_kobj_path: path = '/devices/virtual/block/loop5' kvm [15450]: vcpu0, guest rIP: 0xfff0 kvm_set_msr_common: MSR_IA32_DEBUGCTLMSR 0x3, nop
kobject: 'kvm' (0000000085e711ac): kobject_uevent_env
kobject: 'kvm' (0000000085e711ac): kobject_uevent_env
kobject: 'kvm' (0000000085e711ac): fill_kobj_path: path = '/devices/virtual/misc/kvm' kobject: 'kvm' (0000000085e711ac): fill_kobj_path: path = '/devices/virtual/misc/kvm'
kobject: 'kvm' (0000000085e711ac): kobject_uevent_env
kobject: 'kvm' (0000000085e711ac): fill_kobj_path: path = '/devices/virtual/misc/kvm'
kobject: 'loop0' (00000000d9cc93a0): kobject_uevent_env
kobject: 'loop0' (00000000d9cc93a0): fill_kobj_path: path = '/devices/virtual/block/loop0'
overlayfs: unrecognized mount option "default_permissions\" or missing value
kobject: 'loop4' (000000009e2b886d): kobject_uevent_env
kobject: 'loop4' (000000009e2b886d): fill_kobj_path: path = '/devices/virtual/block/loop4'
kobject: 'kvm' (0000000085e711ac): kobject_uevent_env
overlayfs: unrecognized mount option "default_permissions\" or missing value
kobject: 'kvm' (0000000085e711ac): fill_kobj_path: path = '/devices/virtual/misc/kvm'
kobject: 'kvm' (0000000085e711ac): kobject_uevent_env
kobject: 'kvm' (0000000085e711ac): kobject_uevent_env
kobject: 'kvm' (0000000085e711ac): fill_kobj_path: path = '/devices/virtual/misc/kvm' kobject: 'kvm' (0000000085e711ac): fill_kobj_path: path = '/devices/virtual/misc/kvm'
kobject: 'loop5' (00000000a501efc5): kobject_uevent_env
kobject: 'loop5' (00000000a501efc5): fill_kobj_path: path = '/devices/virtual/block/loop5'
overlayfs: failed to resolve '��file0': -2
overlayfs: failed to resolve '��file0': -2
kobject: 'loop0' (00000000d9cc93a0): kobject_uevent_env
kobject: 'loop0' (00000000d9cc93a0): fill_kobj_path: path = '/devices/virtual/block/loop0'
kobject: 'kvm' (0000000085e711ac): kobject_uevent_env
kobject: 'loop0' (00000000d9cc93a0): kobject_uevent_env
kobject: 'kvm' (0000000085e711ac): fill_kobj_path: path = '/devices/virtual/misc/kvm' kobject: 'loop0' (00000000d9cc93a0): fill_kobj_path: path = '/devices/virtual/block/loop0'
overlayfs: filesystem on './file0' not supported as upperdir
kobject: 'loop4' (000000009e2b886d): kobject_uevent_env
kobject: 'loop4' (000000009e2b886d): fill_kobj_path: path = '/devices/virtual/block/loop4'
kobject: 'loop5' (00000000a501efc5): kobject_uevent_env
kobject: 'loop5' (00000000a501efc5): fill_kobj_path: path = '/devices/virtual/block/loop5'
kobject: 'loop0' (00000000d9cc93a0): kobject_uevent_env
kobject: 'loop0' (00000000d9cc93a0): fill_kobj_path: path = '/devices/virtual/block/loop0'
kobject: 'loop1' (0000000079c3ae74): kobject_uevent_env
kobject: 'loop1' (0000000079c3ae74): fill_kobj_path: path = '/devices/virtual/block/loop1'
kobject: 'loop2' (00000000daaf6648): kobject_uevent_env
kobject: 'loop2' (00000000daaf6648): fill_kobj_path: path = '/devices/virtual/block/loop2'
kobject: 'loop3' (000000009dce83ac): kobject_uevent_env
kobject: 'kvm' (0000000085e711ac): kobject_uevent_env
kobject: 'loop3' (000000009dce83ac): fill_kobj_path: path = '/devices/virtual/block/loop3'
overlayfs: unrecognized mount option "u�7pperdir=./file0" or missing value
kobject: 'kvm' (0000000085e711ac): fill_kobj_path: path = '/devices/virtual/misc/kvm'
overlayfs: unrecognized mount option "u�7pperdir=./file0" or missing value
kobject: 'kvm' (0000000085e711ac): kobject_uevent_env
kobject: 'kvm' (0000000085e711ac): kobject_uevent_env
kobject: 'kvm' (0000000085e711ac): fill_kobj_path: path = '/devices/virtual/misc/kvm' kobject: 'kvm' (0000000085e711ac): fill_kobj_path: path = '/devices/virtual/misc/kvm'
kobject: 'loop0' (00000000d9cc93a0): kobject_uevent_env
kobject: 'loop0' (00000000d9cc93a0): fill_kobj_path: path = '/devices/virtual/block/loop0'
kobject: 'kvm' (0000000085e711ac): kobject_uevent_env
overlayfs: failed to resolve './file1': -2
kobject: 'kvm' (0000000085e711ac): fill_kobj_path: path = '/devices/virtual/misc/kvm'
kobject: 'loop4' (000000009e2b886d): kobject_uevent_env
kobject: 'loop4' (000000009e2b886d): fill_kobj_path: path = '/devices/virtual/block/loop4'
overlayfs: failed to resolve './file1': -2
kobject: 'kvm' (0000000085e711ac): kobject_uevent_env
kobject: 'kvm' (0000000085e711ac): fill_kobj_path: path = '/devices/virtual/misc/kvm'
kobject: 'loop5' (00000000a501efc5): kobject_uevent_env
kobject: 'loop5' (00000000a501efc5): fill_kobj_path: path = '/devices/virtual/block/loop5' kvm [15512]: vcpu0, guest rIP: 0xfff0 kvm_set_msr_common: MSR_IA32_DEBUGCTLMSR 0x3, nop
kobject: 'kvm' (0000000085e711ac): kobject_uevent_env
kobject: 'kvm' (0000000085e711ac): kobject_uevent_env
kobject: 'kvm' (0000000085e711ac): fill_kobj_path: path = '/devices/virtual/misc/kvm' kobject: 'kvm' (0000000085e711ac): fill_kobj_path: path = '/devices/virtual/misc/kvm'
kobject: 'loop5' (00000000a501efc5): kobject_uevent_env
kobject: 'loop5' (00000000a501efc5): fill_kobj_path: path = '/devices/virtual/block/loop5'
kobject: 'kvm' (0000000085e711ac): kobject_uevent_env
overlayfs: unrecognized mount option "upperdis�/file0" or missing value
kobject: 'loop0' (00000000d9cc93a0): kobject_uevent_env
kobject: 'kvm' (0000000085e711ac): fill_kobj_path: path = '/devices/virtual/misc/kvm' kobject: 'loop0' (00000000d9cc93a0): fill_kobj_path: path = '/devices/virtual/block/loop0'
overlayfs: unrecognized mount option "upperdis�/file0" or missing value
kobject: 'loop5' (00000000a501efc5): kobject_uevent_env
kobject: 'loop5' (00000000a501efc5): fill_kobj_path: path = '/devices/virtual/block/loop5'
kobject: 'loop4' (000000009e2b886d): kobject_uevent_env
kobject: 'loop4' (000000009e2b886d): fill_kobj_path: path = '/devices/virtual/block/loop4'
kobject: 'loop0' (00000000d9cc93a0): kobject_uevent_env
kobject: 'loop0' (00000000d9cc93a0): fill_kobj_path: path = '/devices/virtual/block/loop0'
kobject: 'loop5' (00000000a501efc5): kobject_uevent_env
kobject: 'loop5' (00000000a501efc5): fill_kobj_path: path = '/devices/virtual/block/loop5'
kobject: 'loop1' (0000000079c3ae74): kobject_uevent_env
kobject: 'loop1' (0000000079c3ae74): fill_kobj_path: path = '/devices/virtual/block/loop1'
kobject: 'loop2' (00000000daaf6648): kobject_uevent_env
kobject: 'loop2' (00000000daaf6648): fill_kobj_path: path = '/devices/virtual/block/loop2'
kobject: 'loop3' (000000009dce83ac): kobject_uevent_env
kobject: 'kvm' (0000000085e711ac): kobject_uevent_env
kobject: 'loop3' (000000009dce83ac): fill_kobj_path: path = '/devices/virtual/block/loop3'
overlayfs: failed to resolve '/file1': -2
kobject: 'kvm' (0000000085e711ac): fill_kobj_path: path = '/devices/virtual/misc/kvm'
overlayfs: failed to resolve '/file1': -2
kobject: 'kvm' (0000000085e711ac): kobject_uevent_env
kobject: 'kvm' (0000000085e711ac): kobject_uevent_env
kobject: 'loop0' (00000000d9cc93a0): kobject_uevent_env
kobject: 'kvm' (0000000085e711ac): fill_kobj_path: path = '/devices/virtual/misc/kvm' kobject: 'loop0' (00000000d9cc93a0): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'kvm' (0000000085e711ac): fill_kobj_path: path = '/devices/virtual/misc/kvm'
kobject: 'loop5' (00000000a501efc5): kobject_uevent_env
overlayfs: filesystem on './file0' not supported as upperdir
kobject: 'loop5' (00000000a501efc5): fill_kobj_path: path = '/devices/virtual/block/loop5'
kobject: 'loop5' (00000000a501efc5): kobject_uevent_env
kobject: 'loop5' (00000000a501efc5): fill_kobj_path: path = '/devices/virtual/block/loop5'
kobject: 'kvm' (0000000085e711ac): kobject_uevent_env
kobject: 'kvm' (0000000085e711ac): fill_kobj_path: path = '/devices/virtual/misc/kvm'
kobject: 'loop0' (00000000d9cc93a0): kobject_uevent_env
kobject: 'loop0' (00000000d9cc93a0): fill_kobj_path: path = '/devices/virtual/block/loop0'
kobject: 'loop4' (000000009e2b886d): kobject_uevent_env
overlayfs: filesystem on './file0' not supported as upperdir
kobject: 'loop4' (000000009e2b886d): fill_kobj_path: path = '/devices/virtual/block/loop4'
kobject: 'kvm' (0000000085e711ac): kobject_uevent_env
kobject: 'kvm' (0000000085e711ac): fill_kobj_path: path = '/devices/virtual/misc/kvm'
kobject: 'kvm' (0000000085e711ac): kobject_uevent_env
kobject: 'kvm' (0000000085e711ac): fill_kobj_path: path = '/devices/virtual/misc/kvm'
kobject: 'kvm' (0000000085e711ac): kobject_uevent_env
kvm [15572]: vcpu0, guest rIP: 0xfff0 kvm_set_msr_common: MSR_IA32_DEBUGCTLMSR 0x3, nop kobject: 'kvm' (0000000085e711ac): fill_kobj_path: path = '/devices/virtual/misc/kvm'
kobject: 'loop0' (00000000d9cc93a0): kobject_uevent_env
kobject: 'kvm' (0000000085e711ac): kobject_uevent_env
kobject: 'loop0' (00000000d9cc93a0): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'kvm' (0000000085e711ac): fill_kobj_path: path = '/devices/virtual/misc/kvm'
overlayfs: unrecognized mount option "upperdiv=./file0" or missing value
kobject: 'loop5' (00000000a501efc5): kobject_uevent_env
kobject: 'loop5' (00000000a501efc5): fill_kobj_path: path = '/devices/virtual/block/loop5'
overlayfs: unrecognized mount option "upperdiv=./file0" or missing value
kobject: 'kvm' (0000000085e711ac): kobject_uevent_env
kobject: 'loop4' (000000009e2b886d): kobject_uevent_env
kobject: 'loop4' (000000009e2b886d): fill_kobj_path: path = '/devices/virtual/block/loop4'
kobject: 'loop5' (00000000a501efc5): kobject_uevent_env
kobject: 'kvm' (0000000085e711ac): fill_kobj_path: path = '/devices/virtual/misc/kvm' kobject: 'loop5' (00000000a501efc5): fill_kobj_path: path = '/devices/virtual/block/loop5'
kobject: 'kvm' (0000000085e711ac): kobject_uevent_env
kobject: 'kvm' (0000000085e711ac): fill_kobj_path: path = '/devices/virtual/misc/kvm'
kobject: 'loop1' (0000000079c3ae74): kobject_uevent_env
kobject: 'loop1' (0000000079c3ae74): fill_kobj_path: path = '/devices/virtual/block/loop1'
kobject: 'loop2' (00000000daaf6648): kobject_uevent_env
kobject: 'loop2' (00000000daaf6648): fill_kobj_path: path = '/devices/virtual/block/loop2'
kobject: 'loop3' (000000009dce83ac): kobject_uevent_env
kobject: 'kvm' (0000000085e711ac): kobject_uevent_env
kobject: 'kvm' (0000000085e711ac): fill_kobj_path: path = '/devices/virtual/misc/kvm' kobject: 'loop3' (000000009dce83ac): fill_kobj_path: path = '/devices/virtual/block/loop3'
kobject: 'kvm' (0000000085e711ac): kobject_uevent_env
overlayfs: filesystem on './file0' not supported as upperdir
kobject: 'kvm' (0000000085e711ac): kobject_uevent_env
kobject: 'kvm' (0000000085e711ac): fill_kobj_path: path = '/devices/virtual/misc/kvm' kobject: 'kvm' (0000000085e711ac): fill_kobj_path: path = '/devices/virtual/misc/kvm'
kobject: 'kvm' (0000000085e711ac): kobject_uevent_env
kobject: 'kvm' (0000000085e711ac): fill_kobj_path: path = '/devices/virtual/misc/kvm'
kobject: 'loop4' (000000009e2b886d): kobject_uevent_env
kobject: 'loop4' (000000009e2b886d): fill_kobj_path: path = '/devices/virtual/block/loop4'
kobject: 'kvm' (0000000085e711ac): kobject_uevent_env
kobject: 'loop0' (00000000d9cc93a0): kobject_uevent_env
net_ratelimit: 16 callbacks suppressed
protocol 88fb is buggy, dev hsr_slave_0
protocol 88fb is buggy, dev hsr_slave_1
protocol 88fb is buggy, dev hsr_slave_0
protocol 88fb is buggy, dev hsr_slave_1
overlayfs: unrecognized mount option "" or missing value
kobject: 'loop0' (00000000d9cc93a0): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'kvm' (0000000085e711ac): fill_kobj_path: path = '/devices/virtual/misc/kvm'
kobject: 'loop5' (00000000a501efc5): kobject_uevent_env
overlayfs: unrecognized mount option "" or missing value
kobject: 'kvm' (0000000085e711ac): kobject_uevent_env
kobject: 'loop5' (00000000a501efc5): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'kvm' (0000000085e711ac): fill_kobj_path: path = '/devices/virtual/misc/kvm'
kobject: 'loop0' (00000000d9cc93a0): kobject_uevent_env
overlayfs: filesystem on './file0' not supported as upperdir
kobject: 'loop0' (00000000d9cc93a0): fill_kobj_path: path = '/devices/virtual/block/loop0'
kobject: 'kvm' (0000000085e711ac): kobject_uevent_env
kobject: 'kvm' (0000000085e711ac): fill_kobj_path: path = '/devices/virtual/misc/kvm'
kobject: 'loop4' (000000009e2b886d): kobject_uevent_env
kobject: 'loop4' (000000009e2b886d): fill_kobj_path: path = '/devices/virtual/block/loop4'
kobject: 'kvm' (0000000085e711ac): kobject_uevent_env
kobject: 'kvm' (0000000085e711ac): fill_kobj_path: path = '/devices/virtual/misc/kvm' overlayfs: unrecognized mount option "upperdiDr|��9Gr�A��r=./file0" or missing value
kobject: 'kvm' (0000000085e711ac): kobject_uevent_env
kobject: 'loop0' (00000000d9cc93a0): kobject_uevent_env
kobject: 'loop0' (00000000d9cc93a0): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'kvm' (0000000085e711ac): fill_kobj_path: path = '/devices/virtual/misc/kvm'
kobject: 'loop5' (00000000a501efc5): kobject_uevent_env
overlayfs: unrecognized mount option "upperdiDr|��9Gr�A��r=./file0" or missing value kobject: 'loop5' (00000000a501efc5): fill_kobj_path: path = '/devices/virtual/block/loop5'
kobject: 'kvm' (0000000085e711ac): kobject_uevent_env
kobject: 'kvm' (0000000085e711ac): fill_kobj_path: path = '/devices/virtual/misc/kvm'
kobject: 'loop4' (000000009e2b886d): kobject_uevent_env
kobject: 'loop4' (000000009e2b886d): fill_kobj_path: path = '/devices/virtual/block/loop4'
kobject: 'loop1' (0000000079c3ae74): kobject_uevent_env
kobject: 'loop1' (0000000079c3ae74): fill_kobj_path: path = '/devices/virtual/block/loop1'
kobject: 'loop2' (00000000daaf6648): kobject_uevent_env
kobject: 'loop2' (00000000daaf6648): fill_kobj_path: path = '/devices/virtual/block/loop2'
kobject: 'loop3' (000000009dce83ac): kobject_uevent_env
kobject: 'kvm' (0000000085e711ac): kobject_uevent_env
kobject: 'loop3' (000000009dce83ac): fill_kobj_path: path = '/devices/virtual/block/loop3'
overlayfs: unrecognized mount option "lower�" or missing value
kobject: 'kvm' (0000000085e711ac): fill_kobj_path: path = '/devices/virtual/misc/kvm'
kvm_set_msr_common: 1 callbacks suppressed
kvm [15659]: vcpu0, guest rIP: 0xfff0 kvm_set_msr_common: MSR_IA32_DEBUGCTLMSR 0x3, nop
overlayfs: unrecognized mount option "lower�" or missing value
kobject: 'kvm' (0000000085e711ac): kobject_uevent_env
kobject: 'kvm' (0000000085e711ac): kobject_uevent_env
kobject: 'kvm' (0000000085e711ac): fill_kobj_path: path = '/devices/virtual/misc/kvm' kobject: 'kvm' (0000000085e711ac): fill_kobj_path: path = '/devices/virtual/misc/kvm'
kobject: 'loop5' (00000000a501efc5): kobject_uevent_env
kobject: 'loop5' (00000000a501efc5): fill_kobj_path: path = '/devices/virtual/block/loop5'
kobject: 'loop0' (00000000d9cc93a0): kobject_uevent_env
kobject: 'kvm' (0000000085e711ac): kobject_uevent_env
kobject: 'loop0' (00000000d9cc93a0): fill_kobj_path: path = '/devices/virtual/block/loop0'
kobject: 'loop0' (00000000d9cc93a0): kobject_uevent_env
protocol 88fb is buggy, dev hsr_slave_0
protocol 88fb is buggy, dev hsr_slave_1
protocol 88fb is buggy, dev hsr_slave_0
protocol 88fb is buggy, dev hsr_slave_1
protocol 88fb is buggy, dev hsr_slave_0
protocol 88fb is buggy, dev hsr_slave_1
kobject: 'kvm' (0000000085e711ac): fill_kobj_path: path = '/devices/virtual/misc/kvm'
print_req_error: I/O error, dev loop0, sector 120 flags 0
print_req_error: I/O error, dev loop0, sector 0 flags 801
Buffer I/O error on dev loop0, logical block 0, lost async page write
print_req_error: I/O error, dev loop0, sector 8 flags 801
kobject: 'loop0' (00000000d9cc93a0): fill_kobj_path: path = '/devices/virtual/block/loop0'
Buffer I/O error on dev loop0, logical block 1, lost async page write
print_req_error: I/O error, dev loop0, sector 16 flags 801
Buffer I/O error on dev loop0, logical block 2, lost async page write
kobject: 'loop4' (000000009e2b886d): kobject_uevent_env
kobject: 'loop4' (000000009e2b886d): fill_kobj_path: path = '/devices/virtual/block/loop4'
kobject: 'kvm' (0000000085e711ac): kobject_uevent_env
kobject: 'loop5' (00000000a501efc5): kobject_uevent_env
kobject: 'loop5' (00000000a501efc5): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'kvm' (0000000085e711ac): fill_kobj_path: path = '/devices/virtual/misc/kvm'
kobject: 'kvm' (0000000085e711ac): kobject_uevent_env
kobject: 'kvm' (0000000085e711ac): kobject_uevent_env
kobject: 'kvm' (0000000085e711ac): fill_kobj_path: path = '/devices/virtual/misc/kvm' kobject: 'kvm' (0000000085e711ac): fill_kobj_path: path = '/devices/virtual/misc/kvm'
kobject: 'loop0' (00000000d9cc93a0): kobject_uevent_env
kobject: 'loop0' (00000000d9cc93a0): fill_kobj_path: path = '/devices/virtual/block/loop0'
kobject: 'loop5' (00000000a501efc5): kobject_uevent_env
kobject: 'kvm' (0000000085e711ac): kobject_uevent_env
kobject: 'loop5' (00000000a501efc5): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'kvm' (0000000085e711ac): fill_kobj_path: path = '/devices/virtual/misc/kvm'
kobject: 'loop0' (00000000d9cc93a0): kobject_uevent_env
kobject: 'loop0' (00000000d9cc93a0): fill_kobj_path: path = '/devices/virtual/block/loop0'
kobject: 'loop4' (000000009e2b886d): kobject_uevent_env
kobject: 'loop4' (000000009e2b886d): fill_kobj_path: path = '/devices/virtual/block/loop4'
kobject: 'loop1' (0000000079c3ae74): kobject_uevent_env
kobject: 'loop1' (0000000079c3ae74): fill_kobj_path: path = '/devices/virtual/block/loop1'
kobject: 'loop0' (00000000d9cc93a0): kobject_uevent_env
kobject: 'loop0' (00000000d9cc93a0): fill_kobj_path: path = '/devices/virtual/block/loop0'
kobject: 'loop5' (00000000a501efc5): kobject_uevent_env
kobject: 'loop5' (00000000a501efc5): fill_kobj_path: path = '/devices/virtual/block/loop5'
kobject: 'loop0' (00000000d9cc93a0): kobject_uevent_env
kobject: 'loop0' (00000000d9cc93a0): fill_kobj_path: path = '/devices/virtual/block/loop0'
kobject: 'loop2' (00000000daaf6648): kobject_uevent_env
kobject: 'loop2' (00000000daaf6648): fill_kobj_path: path = '/devices/virtual/block/loop2'
kobject: 'loop0' (00000000d9cc93a0): kobject_uevent_env
kobject: 'loop0' (00000000d9cc93a0): fill_kobj_path: path = '/devices/virtual/block/loop0'
kobject: 'kvm' (0000000085e711ac): kobject_uevent_env
kobject: 'kvm' (0000000085e711ac): fill_kobj_path: path = '/devices/virtual/misc/kvm'
kobject: 'loop3' (000000009dce83ac): kobject_uevent_env
kobject: 'loop3' (000000009dce83ac): fill_kobj_path: path = '/devices/virtual/block/loop3'
kobject: 'kvm' (0000000085e711ac): kobject_uevent_env
kobject: 'kvm' (0000000085e711ac): fill_kobj_path: path = '/devices/virtual/misc/kvm'
kobject: 'kvm' (0000000085e711ac): kobject_uevent_env
kobject: 'kvm' (0000000085e711ac): fill_kobj_path: path = '/devices/virtual/misc/kvm'
kobject: 'loop5' (00000000a501efc5): kobject_uevent_env
kobject: 'loop5' (00000000a501efc5): fill_kobj_path: path = '/devices/virtual/block/loop5'
kobject: 'kvm' (0000000085e711ac): kobject_uevent_env
kobject: 'kvm' (0000000085e711ac): fill_kobj_path: path = '/devices/virtual/misc/kvm'
kobject: 'loop0' (00000000d9cc93a0): kobject_uevent_env
kobject: 'loop0' (00000000d9cc93a0): fill_kobj_path: path = '/devices/virtual/block/loop0'
kobject: 'loop4' (000000009e2b886d): kobject_uevent_env
kobject: 'kvm' (0000000085e711ac): kobject_uevent_env
kobject: 'loop4' (000000009e2b886d): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'kvm' (0000000085e711ac): fill_kobj_path: path = '/devices/virtual/misc/kvm'
kobject: 'loop5' (00000000a501efc5): kobject_uevent_env
kvm [15737]: vcpu0, guest rIP: 0xfff0 kvm_set_msr_common: MSR_IA32_DEBUGCTLMSR 0x3, nop kobject: 'loop5' (00000000a501efc5): fill_kobj_path: path = '/devices/virtual/block/loop5'
kobject: 'loop0' (00000000d9cc93a0): kobject_uevent_env
kobject: 'loop0' (00000000d9cc93a0): fill_kobj_path: path = '/devices/virtual/block/loop0'
kobject: 'kvm' (0000000085e711ac): kobject_uevent_env
kobject: 'kvm' (0000000085e711ac): kobject_uevent_env
kobject: 'kvm' (0000000085e711ac): fill_kobj_path: path = '/devices/virtual/misc/kvm' kobject: 'kvm' (0000000085e711ac): fill_kobj_path: path = '/devices/virtual/misc/kvm'
kobject: 'loop0' (00000000d9cc93a0): kobject_uevent_env
kobject: 'loop0' (00000000d9cc93a0): fill_kobj_path: path = '/devices/virtual/block/loop0'
kobject: 'loop5' (00000000a501efc5): kobject_uevent_env
kobject: 'loop5' (00000000a501efc5): fill_kobj_path: path = '/devices/virtual/block/loop5'
kobject: 'kvm' (0000000085e711ac): kobject_uevent_env
kobject: 'kvm' (0000000085e711ac): fill_kobj_path: path = '/devices/virtual/misc/kvm'
kobject: 'loop0' (00000000d9cc93a0): kobject_uevent_env
kobject: 'loop0' (00000000d9cc93a0): fill_kobj_path: path = '/devices/virtual/block/loop0'
kobject: 'loop4' (000000009e2b886d): kobject_uevent_env
kobject: 'loop4' (000000009e2b886d): fill_kobj_path: path = '/devices/virtual/block/loop4'
kobject: 'loop0' (00000000d9cc93a0): kobject_uevent_env
kobject: 'loop0' (00000000d9cc93a0): fill_kobj_path: path = '/devices/virtual/block/loop0'
kobject: 'loop1' (0000000079c3ae74): kobject_uevent_env
kobject: 'loop1' (0000000079c3ae74): fill_kobj_path: path = '/devices/virtual/block/loop1'
kobject: 'loop5' (00000000a501efc5): kobject_uevent_env
kobject: 'loop5' (00000000a501efc5): fill_kobj_path: path = '/devices/virtual/block/loop5'
kobject: 'loop2' (00000000daaf6648): kobject_uevent_env
kobject: 'loop2' (00000000daaf6648): fill_kobj_path: path = '/devices/virtual/block/loop2'
kobject: 'loop3' (000000009dce83ac): kobject_uevent_env
kobject: 'loop3' (000000009dce83ac): fill_kobj_path: path = '/devices/virtual/block/loop3'
kobject: 'kvm' (0000000085e711ac): kobject_uevent_env
kobject: 'loop0' (00000000d9cc93a0): kobject_uevent_env
kobject: 'kvm' (0000000085e711ac): fill_kobj_path: path = '/devices/virtual/misc/kvm' kobject: 'loop0' (00000000d9cc93a0): fill_kobj_path: path = '/devices/virtual/block/loop0'
kobject: 'loop0' (00000000d9cc93a0): kobject_uevent_env
kobject: 'kvm' (0000000085e711ac): kobject_uevent_env
kobject: 'loop0' (00000000d9cc93a0): fill_kobj_path: path = '/devices/virtual/block/loop0'
kobject: 'kvm' (0000000085e711ac): kobject_uevent_env
kobject: 'kvm' (0000000085e711ac): fill_kobj_path: path = '/devices/virtual/misc/kvm' kobject: 'kvm' (0000000085e711ac): fill_kobj_path: path = '/devices/virtual/misc/kvm'
kobject: 'kvm' (0000000085e711ac): kobject_uevent_env
kobject: 'kvm' (0000000085e711ac): fill_kobj_path: path = '/devices/virtual/misc/kvm'
kobject: 'loop0' (00000000d9cc93a0): kobject_uevent_env
kobject: 'loop0' (00000000d9cc93a0): fill_kobj_path: path = '/devices/virtual/block/loop0'
kobject: 'loop4' (000000009e2b886d): kobject_uevent_env
kobject: 'loop0' (00000000d9cc93a0): kobject_uevent_env
kobject: 'kvm' (0000000085e711ac): kobject_uevent_env
kobject: 'kvm' (0000000085e711ac): fill_kobj_path: path = '/devices/virtual/misc/kvm' kobject: 'loop4' (000000009e2b886d): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop0' (00000000d9cc93a0): fill_kobj_path: path = '/devices/virtual/block/loop0'
print_req_error: I/O error, dev loop0, sector 0 flags 801
Buffer I/O error on dev loop0, logical block 0, lost async page write
print_req_error: I/O error, dev loop0, sector 8 flags 801
Buffer I/O error on dev loop0, logical block 1, lost async page write
print_req_error: I/O error, dev loop0, sector 16 flags 801
kvm [15793]: vcpu0, guest rIP: 0xfff0 kvm_set_msr_common: MSR_IA32_DEBUGCTLMSR 0x3, nop
Buffer I/O error on dev loop0, logical block 2, lost async page write
print_req_error: I/O error, dev loop0, sector 24 flags 801
Buffer I/O error on dev loop0, logical block 3, lost async page write
print_req_error: I/O error, dev loop0, sector 32 flags 801
Buffer I/O error on dev loop0, logical block 4, lost async page write
kobject: 'kvm' (0000000085e711ac): kobject_uevent_env
kobject: 'kvm' (0000000085e711ac): kobject_uevent_env
kobject: 'kvm' (0000000085e711ac): fill_kobj_path: path = '/devices/virtual/misc/kvm' kobject: 'kvm' (0000000085e711ac): fill_kobj_path: path = '/devices/virtual/misc/kvm'
kobject: 'kvm' (0000000085e711ac): kobject_uevent_env
kobject: 'kvm' (0000000085e711ac): fill_kobj_path: path = '/devices/virtual/misc/kvm'
kobject: 'loop5' (00000000a501efc5): kobject_uevent_env
kobject: 'loop5' (00000000a501efc5): fill_kobj_path: path = '/devices/virtual/block/loop5'
kobject: 'loop0' (00000000d9cc93a0): kobject_uevent_env
kobject: 'loop0' (00000000d9cc93a0): fill_kobj_path: path = '/devices/virtual/block/loop0'
kobject: 'loop1' (0000000079c3ae74): kobject_uevent_env
kobject: 'loop1' (0000000079c3ae74): fill_kobj_path: path = '/devices/virtual/block/loop1'
kobject: 'loop4' (000000009e2b886d): kobject_uevent_env
kobject: 'loop0' (00000000d9cc93a0): kobject_uevent_env
kobject: 'loop4' (000000009e2b886d): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop0' (00000000d9cc93a0): fill_kobj_path: path = '/devices/virtual/block/loop0'
kobject: 'loop5' (00000000a501efc5): kobject_uevent_env
kobject: 'loop5' (00000000a501efc5): fill_kobj_path: path = '/devices/virtual/block/loop5'
kobject: 'loop0' (00000000d9cc93a0): kobject_uevent_env
kobject: 'loop0' (00000000d9cc93a0): fill_kobj_path: path = '/devices/virtual/block/loop0'
kobject: 'loop0' (00000000d9cc93a0): kobject_uevent_env
kobject: 'loop0' (00000000d9cc93a0): fill_kobj_path: path = '/devices/virtual/block/loop0'
kobject: 'loop0' (00000000d9cc93a0): kobject_uevent_env
kobject: 'loop0' (00000000d9cc93a0): fill_kobj_path: path = '/devices/virtual/block/loop0'
kobject: 'loop2' (00000000daaf6648): kobject_uevent_env
kobject: 'loop2' (00000000daaf6648): fill_kobj_path: path = '/devices/virtual/block/loop2'
kobject: 'loop3' (000000009dce83ac): kobject_uevent_env
kobject: 'kvm' (0000000085e711ac): kobject_uevent_env
kobject: 'loop3' (000000009dce83ac): fill_kobj_path: path = '/devices/virtual/block/loop3'
kobject: 'loop0' (00000000d9cc93a0): kobject_uevent_env
kobject: 'kvm' (0000000085e711ac): fill_kobj_path: path = '/devices/virtual/misc/kvm' kobject: 'loop0' (00000000d9cc93a0): fill_kobj_path: path = '/devices/virtual/block/loop0'
kobject: 'loop5' (00000000a501efc5): kobject_uevent_env
kobject: 'loop5' (00000000a501efc5): fill_kobj_path: path = '/devices/virtual/block/loop5'
kobject: 'kvm' (0000000085e711ac): kobject_uevent_env
kobject: 'kvm' (0000000085e711ac): fill_kobj_path: path = '/devices/virtual/misc/kvm'
kobject: 'kvm' (0000000085e711ac): kobject_uevent_env
kobject: 'kvm' (0000000085e711ac): fill_kobj_path: path = '/devices/virtual/misc/kvm'
kobject: 'loop5' (00000000a501efc5): kobject_uevent_env
kobject: 'loop5' (00000000a501efc5): fill_kobj_path: path = '/devices/virtual/block/loop5'
kobject: 'loop0' (00000000d9cc93a0): kobject_uevent_env
kobject: 'kvm' (0000000085e711ac): kobject_uevent_env
kobject: 'loop0' (00000000d9cc93a0): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'kvm' (0000000085e711ac): fill_kobj_path: path = '/devices/virtual/misc/kvm'
kobject: 'loop5' (00000000a501efc5): kobject_uevent_env
kobject: 'loop5' (00000000a501efc5): fill_kobj_path: path = '/devices/virtual/block/loop5'
kobject: 'loop0' (00000000d9cc93a0): kobject_uevent_env
kobject: 'loop0' (00000000d9cc93a0): fill_kobj_path: path = '/devices/virtual/block/loop0'
kobject: 'loop4' (000000009e2b886d): kobject_uevent_env
kobject: 'loop4' (000000009e2b886d): fill_kobj_path: path = '/devices/virtual/block/loop4'
kobject: 'kvm' (0000000085e711ac): kobject_uevent_env
kobject: 'kvm' (0000000085e711ac): fill_kobj_path: path = '/devices/virtual/misc/kvm' kvm [15856]: vcpu0, guest rIP: 0xfff0 kvm_set_msr_common: MSR_IA32_DEBUGCTLMSR 0x3, nop
kobject: 'loop0' (00000000d9cc93a0): kobject_uevent_env
kobject: 'kvm' (0000000085e711ac): kobject_uevent_env
kobject: 'kvm' (0000000085e711ac): kobject_uevent_env
kobject: 'loop0' (00000000d9cc93a0): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'kvm' (0000000085e711ac): fill_kobj_path: path = '/devices/virtual/misc/kvm'
kobject: 'loop0' (00000000d9cc93a0): kobject_uevent_env
kobject: 'loop0' (00000000d9cc93a0): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'kvm' (0000000085e711ac): fill_kobj_path: path = '/devices/virtual/misc/kvm'
kobject: 'kvm' (0000000085e711ac): kobject_uevent_env
kobject: 'kvm' (0000000085e711ac): fill_kobj_path: path = '/devices/virtual/misc/kvm'
kobject: 'loop5' (00000000a501efc5): kobject_uevent_env
kobject: 'loop5' (00000000a501efc5): fill_kobj_path: path = '/devices/virtual/block/loop5'
kobject: 'loop4' (000000009e2b886d): kobject_uevent_env
kobject: 'loop4' (000000009e2b886d): fill_kobj_path: path = '/devices/virtual/block/loop4'
kobject: 'loop1' (0000000079c3ae74): kobject_uevent_env
kobject: 'loop1' (0000000079c3ae74): fill_kobj_path: path = '/devices/virtual/block/loop1'
kobject: 'loop0' (00000000d9cc93a0): kobject_uevent_env
kobject: 'loop0' (00000000d9cc93a0): fill_kobj_path: path = '/devices/virtual/block/loop0'
kobject: 'loop2' (00000000daaf6648): kobject_uevent_env
kobject: 'loop2' (00000000daaf6648): fill_kobj_path: path = '/devices/virtual/block/loop2'
kobject: 'loop3' (000000009dce83ac): kobject_uevent_env
kobject: 'loop3' (000000009dce83ac): fill_kobj_path: path = '/devices/virtual/block/loop3'
kobject: 'loop0' (00000000d9cc93a0): kobject_uevent_env
kobject: 'loop0' (00000000d9cc93a0): fill_kobj_path: path = '/devices/virtual/block/loop0'
kobject: 'kvm' (0000000085e711ac): kobject_uevent_env
overlayfs: failed to resolve './file1': -2
kobject: 'kvm' (0000000085e711ac): fill_kobj_path: path = '/devices/virtual/misc/kvm'
kobject: 'loop0' (00000000d9cc93a0): kobject_uevent_env
kobject: 'kvm' (0000000085e711ac): kobject_uevent_env
kobject: 'loop0' (00000000d9cc93a0): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'kvm' (0000000085e711ac): fill_kobj_path: path = '/devices/virtual/misc/kvm'
kobject: 'loop5' (00000000a501efc5): kobject_uevent_env
kobject: 'loop5' (00000000a501efc5): fill_kobj_path: path = '/devices/virtual/block/loop5'
kobject: 'loop0' (00000000d9cc93a0): kobject_uevent_env
kobject: 'loop0' (00000000d9cc93a0): fill_kobj_path: path = '/devices/virtual/block/loop0'
kobject: 'loop4' (000000009e2b886d): kobject_uevent_env
kobject: 'loop4' (000000009e2b886d): fill_kobj_path: path = '/devices/virtual/block/loop4'
kobject: 'kvm' (0000000085e711ac): kobject_uevent_env
kobject: 'loop5' (00000000a501efc5): kobject_uevent_env
kobject: 'loop0' (00000000d9cc93a0): kobject_uevent_env
kobject: 'loop0' (00000000d9cc93a0): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'kvm' (0000000085e711ac): fill_kobj_path: path = '/devices/virtual/misc/kvm' kobject: 'loop5' (00000000a501efc5): fill_kobj_path: path = '/devices/virtual/block/loop5' kvm [15906]: vcpu0, guest rIP: 0xfff0 kvm_set_msr_common: MSR_IA32_DEBUGCTLMSR 0x3, nop
kobject: 'kvm' (0000000085e711ac): kobject_uevent_env
kobject: 'kvm' (0000000085e711ac): kobject_uevent_env
kobject: 'kvm' (0000000085e711ac): fill_kobj_path: path = '/devices/virtual/misc/kvm' kobject: 'kvm' (0000000085e711ac): fill_kobj_path: path = '/devices/virtual/misc/kvm'
kobject: 'kvm' (0000000085e711ac): kobject_uevent_env
kobject: 'kvm' (0000000085e711ac): fill_kobj_path: path = '/devices/virtual/misc/kvm'
kobject: 'loop0' (00000000d9cc93a0): kobject_uevent_env
kobject: 'loop0' (00000000d9cc93a0): fill_kobj_path: path = '/devices/virtual/block/loop0'
kobject: 'loop1' (0000000079c3ae74): kobject_uevent_env
kobject: 'loop1' (0000000079c3ae74): fill_kobj_path: path = '/devices/virtual/block/loop1'
kobject: 'loop4' (000000009e2b886d): kobject_uevent_env
kobject: 'loop4' (000000009e2b886d): fill_kobj_path: path = '/devices/virtual/block/loop4'
kobject: 'loop5' (00000000a501efc5): kobject_uevent_env
kobject: 'loop5' (00000000a501efc5): fill_kobj_path: path = '/devices/virtual/block/loop5'
kobject: 'loop0' (00000000d9cc93a0): kobject_uevent_env
kobject: 'loop0' (00000000d9cc93a0): fill_kobj_path: path = '/devices/virtual/block/loop0'
net_ratelimit: 18 callbacks suppressed
protocol 88fb is buggy, dev hsr_slave_0
protocol 88fb is buggy, dev hsr_slave_1
protocol 88fb is buggy, dev hsr_slave_0
protocol 88fb is buggy, dev hsr_slave_1
protocol 88fb is buggy, dev hsr_slave_0
protocol 88fb is buggy, dev hsr_slave_1
protocol 88fb is buggy, dev hsr_slave_0
protocol 88fb is buggy, dev hsr_slave_1
kobject: 'loop3' (000000009dce83ac): kobject_uevent_env
kobject: 'loop3' (000000009dce83ac): fill_kobj_path: path = '/devices/virtual/block/loop3'
kobject: 'kvm' (0000000085e711ac): kobject_uevent_env
kobject: 'loop2' (00000000daaf6648): kobject_uevent_env
kobject: 'kvm' (0000000085e711ac): fill_kobj_path: path = '/devices/virtual/misc/kvm'
overlayfs: failed to resolve './file1': -2
kobject: 'loop2' (00000000daaf6648): fill_kobj_path: path = '/devices/virtual/block/loop2'
kobject: 'loop0' (00000000d9cc93a0): kobject_uevent_env
kobject: 'kvm' (0000000085e711ac): kobject_uevent_env
kobject: 'loop0' (00000000d9cc93a0): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'kvm' (0000000085e711ac): fill_kobj_path: path = '/devices/virtual/misc/kvm'
kobject: 'loop0' (00000000d9cc93a0): kobject_uevent_env
kobject: 'loop0' (00000000d9cc93a0): fill_kobj_path: path = '/devices/virtual/block/loop0'
kobject: 'loop4' (000000009e2b886d): kobject_uevent_env
kobject: 'loop4' (000000009e2b886d): fill_kobj_path: path = '/devices/virtual/block/loop4'
kobject: 'kvm' (0000000085e711ac): kobject_uevent_env
kobject: 'kvm' (0000000085e711ac): fill_kobj_path: path = '/devices/virtual/misc/kvm'
kobject: 'loop0' (00000000d9cc93a0): kobject_uevent_env
kobject: 'loop0' (00000000d9cc93a0): fill_kobj_path: path = '/devices/virtual/block/loop0'
kobject: 'kvm' (0000000085e711ac): kobject_uevent_env
kobject: 'kvm' (0000000085e711ac): kobject_uevent_env
kobject: 'kvm' (0000000085e711ac): fill_kobj_path: path = '/devices/virtual/misc/kvm'
kobject: 'loop5' (00000000a501efc5): kobject_uevent_env
kobject: 'kvm' (0000000085e711ac): fill_kobj_path: path = '/devices/virtual/misc/kvm' kobject: 'loop5' (00000000a501efc5): fill_kobj_path: path = '/devices/virtual/block/loop5'
kobject: 'loop1' (0000000079c3ae74): kobject_uevent_env
kobject: 'loop1' (0000000079c3ae74): fill_kobj_path: path = '/devices/virtual/block/loop1'
kobject: 'loop0' (00000000d9cc93a0): kobject_uevent_env
kobject: 'kvm' (0000000085e711ac): kobject_uevent_env
kobject: 'loop0' (00000000d9cc93a0): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'kvm' (0000000085e711ac): fill_kobj_path: path = '/devices/virtual/misc/kvm'
kobject: 'loop4' (000000009e2b886d): kobject_uevent_env
kobject: 'loop4' (000000009e2b886d): fill_kobj_path: path = '/devices/virtual/block/loop4'
kobject: 'loop5' (00000000a501efc5): kobject_uevent_env
kobject: 'loop5' (00000000a501efc5): fill_kobj_path: path = '/devices/virtual/block/loop5'


---
This bug is generated by a bot. It may contain errors.
See https://goo.gl/tpsmEJ for more information about syzbot.
syzbot engineers can be reached at syzkaller@xxxxxxxxxxxxxxxx.

syzbot will keep track of this bug report. See:
https://goo.gl/tpsmEJ#bug-status-tracking for how to communicate with syzbot.