INFO: task syz.3.47:6372 blocked for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.3.47        state:D stack:29064 pid:6372  tgid:6363  ppid:6032   task_flags:0x400040 flags:0x00004004
Call Trace:
 <TASK>
 __schedule+0x1798/0x4cc0
 schedule+0x165/0x360
 schedule_preempt_disabled+0x13/0x30
 rwsem_down_write_slowpath+0x872/0xfe0
 down_write_nested+0x1b5/0x200
 filename_create+0x1f8/0x3c0
 do_mknodat+0x184/0x4d0
 __x64_sys_mknod+0x8c/0xa0
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fb0f8d8ebe9
RSP: 002b:00007fb0f9bd5038 EFLAGS: 00000246 ORIG_RAX: 0000000000000085
RAX: ffffffffffffffda RBX: 00007fb0f8fb6090 RCX: 00007fb0f8d8ebe9
RDX: 0000000000000707 RSI: 0000000000000000 RDI: 0000200000000000
RBP: 00007fb0f8e11e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fb0f8fb6128 R14: 00007fb0f8fb6090 R15: 00007fffb6cbbba8
 </TASK>
INFO: task syz.3.47:6374 blocked for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.3.47        state:D stack:29064 pid:6374  tgid:6363  ppid:6032   task_flags:0x400040 flags:0x00004004
Call Trace:
 <TASK>
 __schedule+0x1798/0x4cc0
 schedule+0x165/0x360
 schedule_preempt_disabled+0x13/0x30
 rwsem_down_read_slowpath+0x5fd/0x8f0
 down_read+0x98/0x2e0
 lookup_slow+0x46/0x70
 walk_component+0x2d2/0x400
 path_lookupat+0x163/0x430
 filename_lookup+0x212/0x570
 do_linkat+0x120/0x560
 __x64_sys_link+0x82/0x90
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fb0f8d8ebe9
RSP: 002b:00007fb0f9bb4038 EFLAGS: 00000246 ORIG_RAX: 0000000000000056
RAX: ffffffffffffffda RBX: 00007fb0f8fb6180 RCX: 00007fb0f8d8ebe9
RDX: 0000000000000000 RSI: 00002000000007c0 RDI: 0000200000001240
RBP: 00007fb0f8e11e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fb0f8fb6218 R14: 00007fb0f8fb6180 R15: 00007fffb6cbbba8
 </TASK>
INFO: task syz.3.47:6375 blocked for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.3.47        state:D stack:28856 pid:6375  tgid:6363  ppid:6032   task_flags:0x400040 flags:0x00004004
Call Trace:
 <TASK>
 __schedule+0x1798/0x4cc0
 schedule+0x165/0x360
 schedule_preempt_disabled+0x13/0x30
 rwsem_down_write_slowpath+0x872/0xfe0
 down_write+0x1ab/0x1f0
 path_openat+0x8da/0x3830
 do_filp_open+0x1fa/0x410
 do_sys_openat2+0x121/0x1c0
 __x64_sys_openat+0x138/0x170
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fb0f8d8ebe9
RSP: 002b:00007fb0f9b93038 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007fb0f8fb6270 RCX: 00007fb0f8d8ebe9
RDX: 000000000000275a RSI: 0000200000000040 RDI: ffffffffffffff9c
RBP: 00007fb0f8e11e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fb0f8fb6308 R14: 00007fb0f8fb6270 R15: 00007fffb6cbbba8
 </TASK>
INFO: lockdep is turned off.
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 34 Comm: khungtaskd Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
Call Trace:
 <TASK>
 dump_stack_lvl+0x189/0x250
 nmi_cpu_backtrace+0x39e/0x3d0
 nmi_trigger_cpumask_backtrace+0x17a/0x300
 watchdog+0xf93/0xfe0
 kthread+0x711/0x8a0
 ret_from_fork+0x3fc/0x770
 ret_from_fork_asm+0x1a/0x30
 </TASK>
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 12094 Comm: syz.6.766 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
RIP: 0010:its_return_thunk+0x0/0x10
Code: cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc <c3> cc 90 90 90 90 90 90 90 90 90 90 90 90 90 90 e9 6b 13 b7 f5 cc
RSP: 0000:ffffc9000320fb58 EFLAGS: 00000283
RAX: 0000000000000001 RBX: 0000000000012a45 RCX: 0000000000080000
RDX: ffffc90023ab4000 RSI: 000000000004cdfa RDI: 000000000004cdfb
RBP: ffffc9000320fdd0 R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: ffffed10235987d1 R12: 8000000012a45225
R13: 0000000000000000 R14: ffff88811acc35c0 R15: 0000000000000001
FS:  00007f08702566c0(0000) GS:ffff8880b861b000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f0865929000 CR3: 0000000114808000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 page_table_check_set+0x25/0x730
 set_ptes+0x231/0x240
 __handle_mm_fault+0x3a51/0x5440
 handle_mm_fault+0x40a/0x8e0
 do_user_addr_fault+0xa81/0x1390
 exc_page_fault+0x76/0xf0
 asm_exc_page_fault+0x26/0x30
RIP: 0033:0x7f086f250c46
Code: f0 72 6e 48 63 cd 48 01 c1 49 39 4f 08 72 4c 8d 4d ff 85 ed 74 33 66 0f 1f 44 00 00 48 39 f0 72 1b 4d 8b 07 49 89 c1 49 29 f1 <47> 0f b6 0c 08 45 84 c9 74 08 45 88 0c 00 49 8b 47 10 48 83 c0 01
RSP: 002b:00007f08702554a0 EFLAGS: 00010206
RAX: 0000000000929001 RBX: 00007f0870255540 RCX: 000000000000005a
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 00007f08702555e0
RBP: 0000000000000102 R08: 00007f0865000000 R09: 0000000000929000
R10: 0000000000000000 R11: 00007f0870255550 R12: 0000000000000001
R13: 00007f086f42da20 R14: 0000000000000000 R15: 00007f08702555e0
 </TASK>
