INFO: task syz-executor.0:12615 blocked for more than 430 seconds.
      Not tainted 6.4.0-rc5-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.0  state:D stack:0     pid:12615 ppid:2954   flags:0x00000004
Backtrace: 
[<817fa500>] (__schedule) from [<817fb15c>] (schedule+0x5c/0xac kernel/sched/core.c:6745)
 r10:dfa9ddd4 r9:00000002 r8:dfa9dd84 r7:8492bac0 r6:dfa9ddcc r5:dfa9ddd0
 r4:8492bac0
[<817fb100>] (schedule) from [<81802830>] (schedule_timeout+0xd0/0x108 kernel/time/timer.c:2143)
 r5:dfa9ddd0 r4:7fffffff
[<81802760>] (schedule_timeout) from [<817fc55c>] (do_wait_for_common kernel/sched/completion.c:85 [inline])
[<81802760>] (schedule_timeout) from [<817fc55c>] (__wait_for_common kernel/sched/completion.c:106 [inline])
[<81802760>] (schedule_timeout) from [<817fc55c>] (wait_for_common kernel/sched/completion.c:117 [inline])
[<81802760>] (schedule_timeout) from [<817fc55c>] (wait_for_completion+0x70/0x14c kernel/sched/completion.c:138)
 r6:dfa9ddcc r5:dfa9ddd0 r4:7fffffff
[<817fc4ec>] (wait_for_completion) from [<811b39ac>] (vhost_dev_flush drivers/vhost/vhost.c:243 [inline])
[<817fc4ec>] (wait_for_completion) from [<811b39ac>] (vhost_dev_flush+0x90/0xdc drivers/vhost/vhost.c:234)
 r10:400004d8 r9:00000001 r8:84974a00 r7:84970004 r6:00000000 r5:84970000
 r4:84970000
[<811b391c>] (vhost_dev_flush) from [<811aa128>] (vhost_vsock_flush drivers/vhost/vsock.c:682 [inline])
[<811b391c>] (vhost_dev_flush) from [<811aa128>] (vhost_vsock_dev_release+0xc4/0x180 drivers/vhost/vsock.c:734)
 r4:84974000
[<811aa064>] (vhost_vsock_dev_release) from [<804cfeb0>] (__fput+0x84/0x264 fs/file_table.c:321)
 r9:00000001 r8:83541610 r7:840af850 r6:83d3b990 r5:000e001f r4:8588ba80
[<804cfe2c>] (__fput) from [<804d010c>] (____fput+0x10/0x14 fs/file_table.c:349)
 r9:00000001 r8:8492c2fc r7:828515e0 r6:8492bac0 r5:8492c2cc r4:00000000
[<804d00fc>] (____fput) from [<802678bc>] (task_work_run+0x8c/0xb4 kernel/task_work.c:179)
[<80267830>] (task_work_run) from [<80248cc4>] (exit_task_work include/linux/task_work.h:38 [inline])
[<80267830>] (task_work_run) from [<80248cc4>] (do_exit+0x314/0xa9c kernel/exit.c:874)
 r9:00000001 r8:dfa9de9c r7:836d96c0 r6:8492c2f8 r5:836d9680 r4:8492bac0
[<802489b0>] (do_exit) from [<80249634>] (do_group_exit+0x40/0x8c kernel/exit.c:1024)
 r7:fffffe30
[<802495f4>] (do_group_exit) from [<80258184>] (get_signal+0x9b4/0xa28 kernel/signal.c:2876)
 r7:fffffe30 r4:8492bac0
[<802577d0>] (get_signal) from [<8020be40>] (do_signal arch/arm/kernel/signal.c:577 [inline])
[<802577d0>] (get_signal) from [<8020be40>] (do_work_pending+0x260/0x538 arch/arm/kernel/signal.c:617)
 r10:5ac3c35a r9:0004dfac r8:fffffe00 r7:fffffe30 r6:dfa9df44 r5:dfa9dfb0
 r4:8492bac0
[<8020bbe0>] (do_work_pending) from [<80200088>] (slow_work_pending+0xc/0x20)
Exception stack(0xdfa9dfb0 to 0xdfa9dff8)
dfa0:                                     0014c288 00000080 00000000 00000000
dfc0: 00000000 00000000 00000000 000000f0 7ea883c2 76b2e6d0 7ea88534 76b2e20c
dfe0: 76b2e0b8 76b2e0a8 0001ef18 0004dfac 60000010 0014c288
 r10:000000f0 r9:8492bac0 r8:80200288 r7:000000f0 r6:00000000 r5:00000000
 r4:00000000
NMI backtrace for cpu 0
CPU: 0 PID: 27 Comm: khungtaskd Not tainted 6.4.0-rc5-syzkaller #0
Hardware name: ARM-Versatile Express
Backtrace: 
[<817da1f8>] (dump_backtrace) from [<817da2ec>] (show_stack+0x18/0x1c arch/arm/kernel/traps.c:256)
 r7:00000000 r6:00000013 r5:60000093 r4:81f9d804
[<817da2d4>] (show_stack) from [<817f6dc0>] (__dump_stack lib/dump_stack.c:88 [inline])
[<817da2d4>] (show_stack) from [<817f6dc0>] (dump_stack_lvl+0x48/0x54 lib/dump_stack.c:106)
[<817f6d78>] (dump_stack_lvl) from [<817f6de4>] (dump_stack+0x18/0x1c lib/dump_stack.c:113)
 r5:00000000 r4:00000001
[<817f6dcc>] (dump_stack) from [<817c7b48>] (nmi_cpu_backtrace+0x160/0x17c lib/nmi_backtrace.c:113)
[<817c79e8>] (nmi_cpu_backtrace) from [<817c7c98>] (nmi_trigger_cpumask_backtrace+0x134/0x1dc lib/nmi_backtrace.c:62)
 r7:8260c498 r6:00000000 r5:8261a840 r4:00000000
[<817c7b64>] (nmi_trigger_cpumask_backtrace) from [<80210814>] (arch_trigger_cpumask_backtrace+0x18/0x1c arch/arm/kernel/smp.c:855)
 r9:00016bc1 r8:82604d40 r7:00007f59 r6:82896230 r5:8260c614 r4:833b2c64
[<802107fc>] (arch_trigger_cpumask_backtrace) from [<8033df44>] (trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline])
[<802107fc>] (arch_trigger_cpumask_backtrace) from [<8033df44>] (check_hung_uninterruptible_tasks kernel/hung_task.c:222 [inline])
[<802107fc>] (arch_trigger_cpumask_backtrace) from [<8033df44>] (watchdog+0x498/0x5a0 kernel/hung_task.c:379)
[<8033daac>] (watchdog) from [<8026b1a4>] (kthread+0x100/0x130 kernel/kthread.c:379)
 r10:00000000 r9:df819e5c r8:83224340 r7:00000000 r6:8033daac r5:83270bc0
 r4:832aff00
[<8026b0a4>] (kthread) from [<80200100>] (ret_from_fork+0x14/0x34 arch/arm/kernel/entry-common.S:133)
Exception stack(0xdf8cdfb0 to 0xdf8cdff8)
dfa0:                                     00000000 00000000 00000000 00000000
dfc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
dfe0: 00000000 00000000 00000000 00000000 00000013 00000000
 r9:00000000 r8:00000000 r7:00000000 r6:00000000 r5:8026b0a4 r4:832aff00
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 2956 Comm: syz-executor.1 Not tainted 6.4.0-rc5-syzkaller #0
Hardware name: ARM-Versatile Express
PC is at save_return_addr+0x0/0x30 arch/arm/kernel/return_address.c:20
LR is at walk_stackframe+0x24/0x44 arch/arm/kernel/stacktrace.c:135
pc : [<8020d31c>]    lr : [<8020c2b8>]    psr: 60000013
sp : df995c00  ip : df995c84  fp : df995c1c
r10: 83d653c8  r9 : 83d6559c  r8 : 00000000
r7 : df995cf0  r6 : 8020d31c  r5 : df995c24  r4 : df995c2c
r3 : df995c2c  r2 : 81803c05  r1 : 81803c04  r0 : df995c24
Flags: nZCv  IRQs on  FIQs on  Mode SVC_32  ISA ARM  Segment none
Control: 30c5387d  Table: 84d11200  DAC: 00000000
Backtrace: 
[<8020c294>] (walk_stackframe) from [<8020d3ac>] (return_address+0x60/0x174 arch/arm/kernel/return_address.c:52)
 r7:df995cf0 r6:81803c04 r5:00000001 r4:00000000
[<8020d34c>] (return_address) from [<80277e50>] (get_lock_parent_ip include/linux/ftrace.h:975 [inline])
[<8020d34c>] (return_address) from [<80277e50>] (preempt_latency_start kernel/sched/core.c:5793 [inline])
[<8020d34c>] (return_address) from [<80277e50>] (preempt_count_add+0x98/0x15c kernel/sched/core.c:5818)
 r4:84629780
[<80277db8>] (preempt_count_add) from [<81803c04>] (__raw_read_lock include/linux/rwlock_api_smp.h:149 [inline])
[<80277db8>] (preempt_count_add) from [<81803c04>] (_raw_read_lock+0x18/0x3c kernel/locking/spinlock.c:228)
 r6:83d653c8 r5:00000000 r4:83d6559c
[<81803bec>] (_raw_read_lock) from [<805c904c>] (ext4_es_lookup_extent+0x54/0x2f4 fs/ext4/extents_status.c:928)
 r5:00000000 r4:df995d50
[<805c8ff8>] (ext4_es_lookup_extent) from [<805dace4>] (ext4_map_blocks+0x174/0x634 fs/ext4/inode.c:506)
 r9:00000000 r8:00000000 r7:00000000 r6:00000000 r5:83d653c8 r4:df995d50
[<805dab70>] (ext4_map_blocks) from [<805dbdb4>] (ext4_getblk+0x70/0x2ec fs/ext4/inode.c:835)
 r10:83d653c8 r9:00000000 r8:00000000 r7:00000000 r6:00000000 r5:83d653c8
 r4:00000000
[<805dbd44>] (ext4_getblk) from [<805dc13c>] (ext4_bread_batch+0x58/0x1c4 fs/ext4/inode.c:912)
 r9:00000000 r8:00000001 r7:df995e04 r6:00000000 r5:df995e04 r4:00000000
[<805dc0e4>] (ext4_bread_batch) from [<805fc24c>] (__ext4_find_entry+0x154/0x618 fs/ext4/namei.c:1666)
 r10:00000000 r9:00000001 r8:00000001 r7:83d653c8 r6:00000000 r5:00000004
 r4:00000000
[<805fc0f8>] (__ext4_find_entry) from [<805fcefc>] (ext4_lookup_entry fs/ext4/namei.c:1767 [inline])
[<805fc0f8>] (__ext4_find_entry) from [<805fcefc>] (ext4_lookup fs/ext4/namei.c:1835 [inline])
[<805fc0f8>] (__ext4_find_entry) from [<805fcefc>] (ext4_lookup+0x19c/0x280 fs/ext4/namei.c:1826)
 r10:00000027 r9:00000000 r8:83d653c8 r7:df995f18 r6:83d653c8 r5:8528e2a8
 r4:00000000
[<805fcd60>] (ext4_lookup) from [<804db970>] (lookup_one_qstr_excl+0x68/0x90 fs/namei.c:1605)
 r9:00000000 r8:83d653c8 r7:df995f18 r6:00000600 r5:851e57f8 r4:8528e2a8
[<804db908>] (lookup_one_qstr_excl) from [<804df774>] (filename_create+0xc0/0x170 fs/namei.c:3885)
 r9:00000000 r8:df995f18 r7:00000600 r6:df995f5c r5:00000600 r4:00000000
[<804df6b4>] (filename_create) from [<804e2358>] (do_mkdirat+0x44/0x13c fs/namei.c:4130)
 r9:00000002 r8:ffffff9c r7:83632000 r6:000001ff r5:7eb62640 r4:000001ff
[<804e2314>] (do_mkdirat) from [<804e24b8>] (__do_sys_mkdir fs/namei.c:4158 [inline])
[<804e2314>] (do_mkdirat) from [<804e24b8>] (sys_mkdir+0x2c/0x30 fs/namei.c:4156)
 r9:84629780 r8:80200288 r7:00000027 r6:00000000 r5:7eb62640 r4:000001ff
[<804e248c>] (sys_mkdir) from [<80200060>] (ret_fast_syscall+0x0/0x1c arch/arm/mm/proc-v7.S:66)
Exception stack(0xdf995fa8 to 0xdf995ff0)
5fa0:                   7eb62654 7eb62640 7eb62654 000001ff 00000000 00000000
5fc0: 7eb62654 7eb62640 00000000 00000027 001403b0 00140000 000001f4 ffffffff
5fe0: 81010101 7eb625c4 00021618 0004c85c
 r5:7eb62640 r4:7eb62654