INFO: task syz.2.1524:12908 blocked for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.2.1524      state:D stack:22344 pid:12908 tgid:12908 ppid:5841   task_flags:0x400040 flags:0x00004000
Call Trace:
 <TASK>
 __schedule+0x1798/0x4cc0
 schedule+0x165/0x360
 schedule_preempt_disabled+0x13/0x30
 rwsem_down_write_slowpath+0x872/0xfe0
 down_write+0x1ab/0x1f0
 ocfs2_page_mkwrite+0x2ff/0xc40
 do_page_mkwrite+0x14d/0x310
 do_wp_page+0x268d/0x5800
 __handle_mm_fault+0x1033/0x5440
 handle_mm_fault+0x40a/0x8e0
 do_user_addr_fault+0x764/0x1390
 exc_page_fault+0x76/0xf0
 asm_exc_page_fault+0x26/0x30
RIP: 0033:0x7fd594055171
RSP: 002b:00007fff8ddd6f00 EFLAGS: 00010246
RAX: 0000200000000000 RBX: 0000000000000004 RCX: 0000000000000000
RDX: 000000000000d2f0 RSI: 0000000000000000 RDI: 00005555657293c8
RBP: 00007fff8ddd7008 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000002 R12: 00007fd5943b5fac
R13: 00007fff8ddd7030 R14: fffffffffffffffe R15: 00007fff8ddd7050
 </TASK>
INFO: task syz.2.1524:12909 blocked for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.2.1524      state:D stack:22024 pid:12909 tgid:12908 ppid:5841   task_flags:0x400140 flags:0x00004000
Call Trace:
 <TASK>
 __schedule+0x1798/0x4cc0
 schedule+0x165/0x360
 schedule_preempt_disabled+0x13/0x30
 rwsem_down_write_slowpath+0x872/0xfe0
 down_write+0x1ab/0x1f0
 ocfs2_page_mkwrite+0x2ff/0xc40
 do_page_mkwrite+0x14d/0x310
 do_wp_page+0x268d/0x5800
 __handle_mm_fault+0x1033/0x5440
 handle_mm_fault+0x40a/0x8e0
 do_user_addr_fault+0x764/0x1390
 exc_page_fault+0x76/0xf0
 asm_exc_page_fault+0x26/0x30
RIP: 0010:rep_movs_alternative+0x33/0x90
Code: 73 25 85 c9 74 0f 8a 06 88 07 48 ff c7 48 ff c6 48 ff c9 75 f1 e9 8d 09 04 00 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 48 8b 06 <48> 89 07 48 83 c6 08 48 83 c7 08 83 e9 08 74 db 83 f9 08 73 e8 eb
RSP: 0018:ffffc900211e7948 EFLAGS: 00010206
RAX: 0000000000000000 RBX: 0000000000000038 RCX: 0000000000000038
RDX: 0000000000000000 RSI: ffffc900211e79e0 RDI: 00002000000003a0
RBP: ffffc900211e7a90 R08: ffffc900211e7a17 R09: 1ffff9200423cf42
R10: dffffc0000000000 R11: fffff5200423cf43 R12: 00002000000003d8
R13: 00007ffffffff000 R14: ffffc900211e79e0 R15: 00002000000003a0
 _copy_to_user+0x8a/0xb0
 fiemap_fill_next_extent+0x1c0/0x390
 ocfs2_fiemap+0x888/0xc90
 do_vfs_ioctl+0x1173/0x1430
 __se_sys_ioctl+0x82/0x170
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fd59418ebe9
RSP: 002b:00007fd594f58038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fd5943b5fa0 RCX: 00007fd59418ebe9
RDX: 0000200000000380 RSI: 00000000c020660b RDI: 0000000000000005
RBP: 00007fd594211e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fd5943b6038 R14: 00007fd5943b5fa0 R15: 00007fff8ddd6dd8
 </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: 17635 Comm: syz.8.2556 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:preempt_count_add+0xc7/0x1a0
Code: 00 65 4c 8b 34 25 08 50 a0 92 49 81 c6 e0 14 00 00 4c 89 f0 48 c1 e8 03 42 80 3c 38 00 74 08 4c 89 f7 e8 fc 18 93 00 49 89 1e <5b> 41 5e 41 5f c3 cc cc cc cc cc 89 fb 90 e8 e6 9e 34 03 85 c0 74
RSP: 0018:ffffc900035df538 EFLAGS: 00000202
RAX: 0000000000000002 RBX: 0000000000000460 RCX: ffffffff99aba303
RDX: 0000000000000000 RSI: 000000000011881c RDI: 0000000000000001
RBP: ffffc900035df890 R08: ffffea0004620707 R09: 1ffffd40008c40e0
R10: dffffc0000000000 R11: fffff940008c40e1 R12: dffffc0000000000
R13: 1ffffd40008c40e3 R14: 000000000011881c R15: dffffc0000000000
FS:  0000555575505500(0000) GS:ffff8880b861b000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fb3c2bff000 CR3: 000000010f392000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 pfn_valid+0xb3/0x490
 page_table_check_clear+0x21/0x700
 unmap_page_range+0x3445/0x4370
 unmap_vmas+0x399/0x580
 exit_mmap+0x248/0xb50
 __mmput+0x118/0x420
 exit_mm+0x1da/0x2c0
 do_exit+0x648/0x2300
 do_group_exit+0x21c/0x2d0
 __x64_sys_exit_group+0x3f/0x40
 x64_sys_call+0x21f7/0x2200
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f68fb78ebe9
Code: Unable to access opcode bytes at 0x7f68fb78ebbf.
RSP: 002b:00007ffee88f2228 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f68fb78ebe9
RDX: 0000000000000064 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007ffee88f228c R08: 0000001ce88f231f R09: 00000000000927c0
R10: 00000000000001fc R11: 0000000000000246 R12: 000000000000010f
R13: 00000000000927c0 R14: 000000000006dfe1 R15: 00007ffee88f22e0
 </TASK>
