INFO: task syz.6.418:8530 blocked for more than 143 seconds.
      Not tainted syzkaller #0
      Blocked by coredump.
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.6.418       state:D stack:27048 pid:8530  tgid:8530  ppid:7554   task_flags:0x40004c flags:0x00004000
Call Trace:
 <TASK>
 __schedule+0x1798/0x4cc0
 schedule+0x165/0x360
 schedule_timeout+0x9a/0x270
 wait_for_completion+0x2bf/0x5d0
 exit_aio+0x2f1/0x3b0
 __mmput+0x68/0x420
 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: 0033:0x7f56c1f8ebe9
RSP: 002b:00007ffebb5d6ed8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f56c1f8ebe9
RDX: 00007f56c11f9000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007ffebb5d6f3c R08: 00000000000001d8 R09: 00000000000927c0
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000000003b
R13: 00000000000927c0 R14: 000000000002a73a R15: 00007ffebb5d6f90
 </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: 12905 Comm: syz.4.1365 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:xas_find_conflict+0x1a3/0xd90
Code: 89 e6 e8 80 bc 47 f6 49 83 fc 02 0f 94 c0 49 81 ff 01 10 00 00 0f 93 c1 84 c1 49 be 00 00 00 00 00 fc ff df 0f 84 25 0b 00 00 <4c> 8d 63 08 48 8d 43 12 48 89 44 24 20 4c 89 e0 48 c1 e8 03 48 89
RSP: 0018:ffffc9000345f6c8 EFLAGS: 00000002
RAX: ffffffff8b77f301 RBX: ffffc9000345f7c0 RCX: ffff888020ba3901
RDX: 0000000000000002 RSI: 0000000000000002 RDI: 0000000000000002
RBP: ffffc9000345f800 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffff5200068bec4 R12: 0000000000000002
R13: 00000003fffffffc R14: dffffc0000000000 R15: ffff88803f9702c2
FS:  00007fe251e916c0(0000) GS:ffff8880b861b000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fe247bff000 CR3: 000000002c6ba000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 shmem_add_to_page_cache+0x735/0xba0
 shmem_alloc_and_add_folio+0x846/0xf60
 shmem_get_folio_gfp+0x59d/0x1660
 shmem_write_begin+0xf7/0x2b0
 generic_perform_write+0x2c5/0x900
 shmem_file_write_iter+0xf8/0x120
 vfs_write+0x5c9/0xb30
 ksys_write+0x145/0x250
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fe250f8d69f
Code: 89 54 24 18 48 89 74 24 10 89 7c 24 08 e8 f9 92 02 00 48 8b 54 24 18 48 8b 74 24 10 41 89 c0 8b 7c 24 08 b8 01 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 31 44 89 c7 48 89 44 24 08 e8 4c 93 02 00 48
RSP: 002b:00007fe251e90df0 EFLAGS: 00000293 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 0000000001000000 RCX: 00007fe250f8d69f
RDX: 0000000001000000 RSI: 00007fe246c00000 RDI: 0000000000000008
RBP: 0000000000000000 R08: 0000000000000000 R09: 00000000000097ab
R10: 0000200000009642 R11: 0000000000000293 R12: 0000000000000008
R13: 00007fe251e90ef0 R14: 00007fe251e90eb0 R15: 00007fe246c00000
 </TASK>
