random: crng init done
NMI watchdog: BUG: soft lockup - CPU#1 stuck for 123s! [syz-executor694:3996]
Modules linked in:
irq event stamp: 933704
hardirqs last  enabled at (933703): [<ffffffff839f9669>] restore_regs_and_iret+0x0/0x1d
hardirqs last disabled at (933704): [<ffffffff839fa62b>] apic_timer_interrupt+0x9b/0xb0 arch/x86/entry/entry_64.S:648
softirqs last  enabled at (921172): [<ffffffff839ffb1c>] __do_softirq+0x46c/0x937 kernel/softirq.c:310
softirqs last disabled at (921163): [<ffffffff8114b237>] invoke_softirq kernel/softirq.c:364 [inline]
softirqs last disabled at (921163): [<ffffffff8114b237>] irq_exit+0x147/0x190 kernel/softirq.c:405
CPU: 1 PID: 3996 Comm: syz-executor694 Not tainted 4.9.111-g03c70fe #10
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff8801d8ac3000 task.stack: ffff8801b70a0000
RIP: 0010:[<ffffffff8160fc09>]  [<ffffffff8160fc09>] do_make_slave fs/pnode.c:84 [inline]
RIP: 0010:[<ffffffff8160fc09>]  [<ffffffff8160fc09>] change_mnt_propagation+0xa9/0xbd0 fs/pnode.c:130
RSP: 0018:ffff8801b70a7af0  EFLAGS: 00000246
RAX: ffff8801d8ac3000 RBX: ffff8801cda6e400 RCX: ffff8801cda6e468
RDX: 1ffff1003723a2c4 RSI: ffffffff8160fbe8 RDI: ffff8801b91d1620
RBP: ffff8801b70a7b50 R08: ffff8801cda6e468 R09: 0000000000000001
R10: 0000000000000000 R11: 1ffff1003b15872c R12: dffffc0000000000
R13: ffff8801b91d1600 R14: ffff8801d9c47340 R15: ffffed0039b4dc84
FS:  0000000000000000(0000) GS:ffff8801db300000(0063) knlGS:00000000f7667b40
CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: 00000000f76cadb0 CR3: 00000001ca4fa000 CR4: 00000000001606f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Stack:
 ffff8801b70a7b20 ffffffff815db8af 0000000000000000 ffff8801cda6e4f0
 ffff8801cda6e420 ffff8801cda6e4e0 00040000b70a7b50 ffff8801cda6e490
 dffffc0000000000 ffff8801cda6e400 ffff8801d9c469a0 ffff8801b70a7bf0
Call Trace:
 [<ffffffff815dbfd6>] umount_tree+0x326/0x820 fs/namespace.c:1516
 [<ffffffff815e41e0>] attach_recursive_mnt+0x750/0x8f0 fs/namespace.c:2058
 [<ffffffff815e44ef>] graft_tree+0x16f/0x1f0 fs/namespace.c:2122
 [<ffffffff815e6eaf>] do_loopback fs/namespace.c:2243 [inline]
 [<ffffffff815e6eaf>] do_mount+0x1f5f/0x2740 fs/namespace.c:2829
 [<ffffffff8168c3ec>] C_SYSC_mount fs/compat.c:810 [inline]
 [<ffffffff8168c3ec>] compat_SyS_mount+0x4fc/0xff0 fs/compat.c:775
 [<ffffffff81006da7>] do_syscall_32_irqs_on arch/x86/entry/common.c:325 [inline]
 [<ffffffff81006da7>] do_fast_syscall_32+0x2f7/0x870 arch/x86/entry/common.c:387
 [<ffffffff839fa3d0>] entry_SYSENTER_compat+0x90/0xa2 arch/x86/entry/entry_64_compat.S:137
Code: 4d 01 e7 eb 36 e8 28 ee d4 ff 49 8d 7d 20 48 89 fa 48 c1 ea 03 42 80 3c 22 00 0f 85 d7 08 00 00 41 80 3f 00 4d 8b b6 70 ff ff ff <0f> 85 b8 08 00 00 4c 3b 73 20 0f 84 1e 02 00 00 e8 f2 ed d4 ff 
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 1 Comm: init Not tainted 4.9.111-g03c70fe #10
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff8801d99b0000 task.stack: ffff8801d99b8000
RIP: 0010:[<ffffffff815a066b>] 
c [<ffffffff815a066b>] rep_nop arch/x86/include/asm/processor.h:582 [inline]
RIP: 0010:[<ffffffff815a066b>] 
c [<ffffffff815a066b>] cpu_relax arch/x86/include/asm/processor.h:587 [inline]
RIP: 0010:[<ffffffff815a066b>] 
c [<ffffffff815a066b>] __read_seqcount_begin include/linux/seqlock.h:114 [inline]
RIP: 0010:[<ffffffff815a066b>] 
c [<ffffffff815a066b>] raw_read_seqcount_begin include/linux/seqlock.h:147 [inline]
RIP: 0010:[<ffffffff815a066b>] 
c [<ffffffff815a066b>] read_seqcount_begin include/linux/seqlock.h:164 [inline]
RIP: 0010:[<ffffffff815a066b>] 
c [<ffffffff815a066b>] read_seqbegin include/linux/seqlock.h:433 [inline]
RIP: 0010:[<ffffffff815a066b>] 
c [<ffffffff815a066b>] path_init+0x104b/0x1580 fs/namei.c:2189
RSP: 0018:ffff8801d99bfab0  EFLAGS: 00000293
RAX: ffff8801d99b0000 RBX: ffff8801d99bfbe0 RCX: 1ffffffff08c1bc8
RDX: 0000000000000000 RSI: ffffffff815a0669 RDI: 0000000000000246
RBP: ffff8801d99bfb48 R08: ffff8801d99b08e8 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: fffffbfff08c1bc8
R13: ffff8801d5ea331c R14: 0000000000000041 R15: ffffffff8460de40
FS:  00007f19913a77a0(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000f7667db0 CR3: 00000001cd40c000 CR4: 00000000001606f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Stack:
 ffffffff815a3aba
c 0000000000000046
c 0000000000000000
c ffffffff81f1cccc
c
 ffff8801d99b08c0
c ffff8801d99b08c8
c 0000000000000046
c ffffffff843c3108
c
 ffffffff81f1cedd
c 0000000300000002
c 0000000000000046
c 0000000000000092
c
Call Trace:
 [<ffffffff815a3aba>] path_lookupat.isra.41+0x2a/0x410 fs/namei.c:2277
 [<ffffffff815a96c7>] filename_lookup.part.55+0x177/0x370 fs/namei.c:2317
 [<ffffffff815a9a83>] filename_lookup fs/namei.c:2310 [inline]
 [<ffffffff815a9a83>] user_path_at_empty+0x53/0x70 fs/namei.c:2578
 [<ffffffff81580a66>] user_path_at include/linux/namei.h:55 [inline]
 [<ffffffff81580a66>] vfs_fstatat+0xc6/0x170 fs/stat.c:106
 [<ffffffff81581c16>] vfs_stat fs/stat.c:123 [inline]
 [<ffffffff81581c16>] SYSC_newstat+0x86/0xf0 fs/stat.c:270
 [<ffffffff8158201d>] SyS_newstat+0x1d/0x30 fs/stat.c:266
 [<ffffffff81006316>] do_syscall_64+0x1a6/0x490 arch/x86/entry/common.c:282
 [<ffffffff839f8cd3>] entry_SYSCALL_64_after_swapgs+0x5d/0xdb
Code: 
cf6 
cc2 
c01 
c75 
cda 
c41 
c89 
cd5 
ce9 
c21 
cfa 
cff 
cff 
c48 
cba 
c00 
c00 
c00 
c00 
c00 
cfc 
cff 
cdf 
c49 
c89 
cc4 
c49 
c89 
cc7 
c49 
cc1 
cec 
c03 
c49 
c01 
cd4 
ce8 
ca7 
ce3 
cdb 
cff 
cf3 
c90 
c<41> 
c0f 
cb6 
c14 
c24 
c84 
cd2 
c74 
c09 
c80 
cfa 
c03 
c0f 
c8e 
c4c 
c04 
c00 
c00 
c41 
c8b 
c07 
c