binder: 7126:7129 ioctl c0046209 4a4c returned -22
device lo entered promiscuous mode
sd 0:0:1:0: ioctl_internal_command: ILLEGAL REQUEST asc=0x20 ascq=0x0
program syz-executor6 is using a deprecated SCSI ioctl, please convert it to SG_IO
sd 0:0:1:0: ioctl_internal_command: ILLEGAL REQUEST asc=0x20 ascq=0x0
INFO: task syz-executor0:7156 blocked for more than 120 seconds.
      Not tainted 4.4.139-g7ba5557 #65
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor0   D ffff8800a430fbb8 29408  7156   3862 0x00000004
 ffff8800a430fbb8 0000000000000000 ffff8800b6fed0e0 ffffed0016dfda1b
 ffff8800b6fec800 ffff8801db31fdb8 ffff8801db31fde0 ffff8801db31f4d8
 ffff8801db31f4c0 ffff8801d9a41800 ffff8800b6fec800 0000000000000000
Call Trace:
 [<ffffffff838b381a>] schedule+0x7a/0x1b0 kernel/sched/core.c:3359
 [<ffffffff838b3fb3>] schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3392
 [<ffffffff838ba0f7>] __mutex_lock_common kernel/locking/mutex.c:582 [inline]
 [<ffffffff838ba0f7>] mutex_lock_nested+0x307/0x850 kernel/locking/mutex.c:621
 [<ffffffff8158477e>] lock_mount+0x8e/0x2c0 fs/namespace.c:2054
 [<ffffffff8158856d>] do_loopback fs/namespace.c:2187 [inline]
 [<ffffffff8158856d>] do_mount+0x96d/0x2860 fs/namespace.c:2827
 [<ffffffff8158ae70>] SYSC_mount fs/namespace.c:3027 [inline]
 [<ffffffff8158ae70>] SyS_mount+0x130/0x1d0 fs/namespace.c:3005
 [<ffffffff838c1865>] entry_SYSCALL_64_fastpath+0x22/0x9e
1 lock held by syz-executor0/7156:
 #0:  (&sb->s_type->i_mutex_key#18){+.+.+.}, at: [<ffffffff8158477e>] lock_mount+0x8e/0x2c0 fs/namespace.c:2054
Sending NMI to all CPUs:
NMI backtrace for cpu 0
CPU: 0 PID: 492 Comm: khungtaskd Not tainted 4.4.139-g7ba5557 #65
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff8801d8d8e000 task.stack: ffff8801d8d60000
RIP: 0010:[<ffffffff810bfb46>]  [<ffffffff810bfb46>] native_apic_mem_write arch/x86/include/asm/apic.h:94 [inline]
RIP: 0010:[<ffffffff810bfb46>]  [<ffffffff810bfb46>] __default_send_IPI_dest_field arch/x86/include/asm/ipi.h:119 [inline]
RIP: 0010:[<ffffffff810bfb46>]  [<ffffffff810bfb46>] _flat_send_IPI_mask arch/x86/kernel/apic/apic_flat_64.c:61 [inline]
RIP: 0010:[<ffffffff810bfb46>]  [<ffffffff810bfb46>] flat_send_IPI_mask+0xf6/0x1a0 arch/x86/kernel/apic/apic_flat_64.c:69
RSP: 0018:ffff8801d8d67cc8  EFLAGS: 00000046
RAX: 0000000003000000 RBX: 0000000000000c00 RCX: 0000000000000000
RDX: 0000000000000c00 RSI: 0000000000000000 RDI: ffffffffff5fb300
RBP: ffff8801d8d67cf0 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000001 R12: 0000000000000246
R13: 0000000000000003 R14: 0000000000000002 R15: ffffffff8446f6a0
FS:  0000000000000000(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fa62236e140 CR3: 00000000b29fd000 CR4: 00000000001606f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Stack:
 ffffffff8446f6a0 ffffffff84a18ca0 0000000000000007 fffffbfff0942c44
 0000000000000040 ffff8801d8d67d10 ffffffff810b5b01 ffffffff83c0b2a0
 0000000000000003 ffff8801d8d67d68 ffffffff81e18603 ffffffff8140dd6f
Call Trace:
 [<ffffffff810b5b01>] nmi_raise_cpu_backtrace+0x61/0x80 arch/x86/kernel/apic/hw_nmi.c:33
 [<ffffffff81e18603>] nmi_trigger_all_cpu_backtrace.cold.4+0x70/0xad lib/nmi_backtrace.c:85
 [<ffffffff810b5ba4>] arch_trigger_all_cpu_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:38
 [<ffffffff8141a459>] trigger_all_cpu_backtrace include/linux/nmi.h:44 [inline]
 [<ffffffff8141a459>] check_hung_task kernel/hung_task.c:125 [inline]
 [<ffffffff8141a459>] check_hung_uninterruptible_tasks kernel/hung_task.c:182 [inline]
 [<ffffffff8141a459>] watchdog.cold.1+0xd3/0xee kernel/hung_task.c:238
 [<ffffffff81190958>] kthread+0x268/0x300 kernel/kthread.c:211
 [<ffffffff838c1c95>] ret_from_fork+0x55/0x80 arch/x86/entry/entry_64.S:510
Code: b3 5f ff f6 c4 10 75 e2 44 89 e8 c1 e0 18 89 04 25 10 b3 5f ff 44 89 f2 09 da 80 cf 04 41 83 fe 02 0f 44 d3 89 14 25 00 b3 5f ff <41> f7 c4 00 02 00 00 75 1a 4c 89 e7 57 9d 0f 1f 44 00 00 e8 e2 
NMI backtrace for cpu 1
CPU: 1 PID: 7154 Comm: syz-executor0 Not tainted 4.4.139-g7ba5557 #65
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff8800b6feb000 task.stack: ffff8800a3a68000
RIP: 0010:[<ffffffff815b2998>]  [<ffffffff815b2998>] do_make_slave fs/pnode.c:84 [inline]
RIP: 0010:[<ffffffff815b2998>]  [<ffffffff815b2998>] change_mnt_propagation+0xa8/0xb70 fs/pnode.c:130
RSP: 0018:ffff8800a3a6fb08  EFLAGS: 00000246
RAX: ffffed0039157284 RBX: ffff8801c8ab9400 RCX: ffffc90001a8b000
RDX: 1ffff1003ad2df44 RSI: ffffffff815b2976 RDI: ffff8801d696fa20
RBP: ffff8800a3a6fb60 R08: ffff8801c8ab9468 R09: 0000000000000001
R10: 0000000000000000 R11: ffff8800b6feb000 R12: ffff8801d696fa00
R13: 0000000000040000 R14: dffffc0000000000 R15: ffff8801d9fd51e0
FS:  00007fab0099a700(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fab008f4db8 CR3: 00000000aec12000 CR4: 00000000001606f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Stack:
 ffffffff8157e63d ffff8801c8ab9400 0000000000000000 ffff8801c8ab9420
 ffff8801c8ab94e0 ffffed0039157284 ffff8801c8ab9490 dffffc0000000000
 ffff8801c8ab9400 ffff8801d9fd51e0 ffff8800a3a6fc00 ffff8800a3a6fc28
Call Trace:
 [<ffffffff8157ed56>] umount_tree+0x326/0x810 fs/namespace.c:1501
 [<ffffffff8158714c>] attach_recursive_mnt+0x74c/0x8e0 fs/namespace.c:2035
 [<ffffffff8158744f>] graft_tree+0x16f/0x1f0 fs/namespace.c:2099
 [<ffffffff81589ce8>] do_loopback fs/namespace.c:2220 [inline]
 [<ffffffff81589ce8>] do_mount+0x20e8/0x2860 fs/namespace.c:2827
 [<ffffffff8158ae70>] SYSC_mount fs/namespace.c:3027 [inline]
 [<ffffffff8158ae70>] SyS_mount+0x130/0x1d0 fs/namespace.c:3005
 [<ffffffff838c1865>] entry_SYSCALL_64_fastpath+0x22/0x9e
Code: 45 d0 eb 3a e8 3a eb d9 ff 49 8d 7c 24 20 48 89 fa 48 c1 ea 03 42 80 3c 32 00 0f 85 96 08 00 00 48 8b 45 d0 4d 8b bf 70 ff ff ff <80> 38 00 0f 85 74 08 00 00 4c 3b 7b 20 0f 84 13 02 00 00 e8 00