INFO: task syz-executor.1:15781 blocked for more than 143 seconds.
Not tainted 6.8.0-syzkaller-08951-gfe46a7dd189e #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.1 state:D stack:24632 pid:15781 tgid:15781 ppid:8181 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5409 [inline]
__schedule+0x17d3/0x4a20 kernel/sched/core.c:6736
__schedule_loop kernel/sched/core.c:6813 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6828
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6885
__mutex_lock_common kernel/locking/mutex.c:684 [inline]
__mutex_lock+0x6a4/0xd70 kernel/locking/mutex.c:752
vhost_vsock_stop drivers/vhost/vsock.c:635 [inline]
vhost_vsock_dev_release+0x1e8/0x410 drivers/vhost/vsock.c:745
__fput+0x42b/0x8a0 fs/file_table.c:422
__do_sys_close fs/open.c:1556 [inline]
__se_sys_close fs/open.c:1541 [inline]
__x64_sys_close+0x7f/0x110 fs/open.c:1541
do_syscall_64+0xfd/0x240
entry_SYSCALL_64_after_hwframe+0x6d/0x75
RIP: 0033:0x7f04d7a7cc9a
RSP: 002b:00007ffc7dddd5d0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 00007f04d7a7cc9a
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000003
RBP: 0000000000000032 R08: 0000001b30920000 R09: 00000000000003af
R10: 0000000081360ad3 R11: 0000000000000293 R12: 00007f04d7600900
R13: ffffffffffffffff R14: 00007f04d7600000 R15: 000000000006a28d
Showing all locks held in the system:
2 locks held by kworker/u8:0/10:
1 lock held by khungtaskd/29:
#0: ffffffff8e132020 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:298 [inline]
#0: ffffffff8e132020 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:750 [inline]
#0: ffffffff8e132020 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6614
2 locks held by getty/4825:
#0: ffff888029e9a0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc900031332f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6b5/0x1e10 drivers/tty/n_tty.c:2201
2 locks held by syz-executor.1/15781:
#0: ffff888037e40070 (&dev->mutex#4){+.+.}-{3:3}, at: vhost_vsock_stop drivers/vhost/vsock.c:624 [inline]
#0: ffff888037e40070 (&dev->mutex#4){+.+.}-{3:3}, at: vhost_vsock_dev_release+0x199/0x410 drivers/vhost/vsock.c:745
#1: ffff888037e44c70 (&vq->mutex){+.+.}-{3:3}, at: vhost_vsock_stop drivers/vhost/vsock.c:635 [inline]
#1: ffff888037e44c70 (&vq->mutex){+.+.}-{3:3}, at: vhost_vsock_dev_release+0x1e8/0x410 drivers/vhost/vsock.c:745
2 locks held by vhost-15785/15792:
2 locks held by syz-executor.5/15887:
#0: ffff8880b36b0070 (&dev->mutex#4){+.+.}-{3:3}, at: vhost_vsock_stop drivers/vhost/vsock.c:624 [inline]
#0: ffff8880b36b0070 (&dev->mutex#4){+.+.}-{3:3}, at: vhost_vsock_dev_release+0x199/0x410 drivers/vhost/vsock.c:745
#1: ffff8880b36b4c70 (&vq->mutex){+.+.}-{3:3}, at: vhost_vsock_stop drivers/vhost/vsock.c:635 [inline]
#1: ffff8880b36b4c70 (&vq->mutex){+.+.}-{3:3}, at: vhost_vsock_dev_release+0x1e8/0x410 drivers/vhost/vsock.c:745
2 locks held by vhost-15890/15891:
3 locks held by kworker/u8:10/16503:
#0: ffff8880b943e358 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2a/0x140 kernel/sched/core.c:559
#1: ffff8880b9428988 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x441/0x770 kernel/sched/psi.c:988
#2: ffff8880b943e358 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2a/0x140 kernel/sched/core.c:559
1 lock held by syz-executor.4/17333:
#0: ffff88801d0870c0 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:838 [inline]
#0: ffff88801d0870c0 (mapping.invalidate_lock#2){++++}-{3:3}, at: blkdev_fallocate+0x233/0x550 block/fops.c:797
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 29 Comm: khungtaskd Not tainted 6.8.0-syzkaller-08951-gfe46a7dd189e #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/29/2024
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x241/0x360 lib/dump_stack.c:114
nmi_cpu_backtrace+0x49c/0x4d0 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x198/0x320 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:160 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:222 [inline]
watchdog+0xfb0/0xff0 kernel/hung_task.c:379
kthread+0x2f2/0x390 kernel/kthread.c:388
ret_from_fork+0x4d/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:243
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 15792 Comm: vhost-15785 Not tainted 6.8.0-syzkaller-08951-gfe46a7dd189e #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/29/2024
RIP: 0010:trace_lock_acquire include/trace/events/lock.h:24 [inline]
RIP: 0010:lock_acquire+0xdc/0x530 kernel/locking/lockdep.c:5725
Code: 08 0f 83 eb 02 00 00 89 c3 48 89 d8 48 c1 e8 06 48 8d 3c c5 68 3a 87 8f be 08 00 00 00 e8 ac ac 86 00 48 0f a3 1d 2c a0 15 0e <73> 0d e8 bd cf 09 00 84 c0 0f 84 c2 02 00 00 48 c7 c0 9c 6d 87 8f
RSP: 0018:ffffc900095ed840 EFLAGS: 00000257
RAX: 0000000000000001 RBX: 0000000000000001 RCX: ffffffff81719a34
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff8f873a68
RBP: ffffc900095ed998 R08: ffffffff8f873a6f R09: 1ffffffff1f0e74d
R10: dffffc0000000000 R11: fffffbfff1f0e74e R12: 1ffff920012bdb10
R13: dffffc0000000000 R14: 0000000000000000 R15: ffffea0005931648
FS: 00007f04d87526c0(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000c030e30000 CR3: 0000000011a08000 CR4: 0000000000350ef0
Call Trace:
rcu_lock_acquire include/linux/rcupdate.h:298 [inline]
rcu_read_lock include/linux/rcupdate.h:750 [inline]
page_ext_get+0x3d/0x2a0 mm/page_ext.c:508
__page_table_check_zero+0x13d/0x4a0 mm/page_table_check.c:140
page_table_check_free include/linux/page_table_check.h:41 [inline]
free_pages_prepare mm/page_alloc.c:1141 [inline]
free_unref_page_prepare+0x97c/0xa90 mm/page_alloc.c:2346
free_unref_page_list+0x5a3/0x850 mm/page_alloc.c:2532
shrink_folio_list+0x8197/0x8c10 mm/vmscan.c:1488
evict_folios+0xb90/0x2710 mm/vmscan.c:4521
try_to_shrink_lruvec+0xb40/0xea0 mm/vmscan.c:4726
lru_gen_shrink_lruvec mm/vmscan.c:4869 [inline]
shrink_lruvec+0x550/0x2ea0 mm/vmscan.c:5647
shrink_node_memcgs mm/vmscan.c:5867 [inline]
shrink_node+0x9d6/0x3e70 mm/vmscan.c:5902
shrink_zones mm/vmscan.c:6144 [inline]
do_try_to_free_pages+0x771/0x1c30 mm/vmscan.c:6206
try_to_free_mem_cgroup_pages+0x417/0xa20 mm/vmscan.c:6521
try_charge_memcg+0x6da/0x18a0 mm/memcontrol.c:2782
try_charge mm/memcontrol.c:2930 [inline]
charge_memcg+0xa2/0x160 mm/memcontrol.c:7276
__mem_cgroup_charge+0x27/0x80 mm/memcontrol.c:7291
mem_cgroup_charge include/linux/memcontrol.h:690 [inline]
__filemap_add_folio+0x3e6/0x1a60 mm/filemap.c:864
filemap_add_folio+0x11e/0x570 mm/filemap.c:947
page_cache_ra_unbounded+0x211/0x7c0 mm/readahead.c:250
do_sync_mmap_readahead+0x444/0x850
filemap_fault+0x7c6/0x1680 mm/filemap.c:3245
__do_fault+0x137/0x460 mm/memory.c:4396
do_read_fault mm/memory.c:4758 [inline]
do_fault mm/memory.c:4888 [inline]
do_pte_missing mm/memory.c:3745 [inline]
handle_pte_fault mm/memory.c:5164 [inline]
__handle_mm_fault+0x49e6/0x72d0 mm/memory.c:5305
handle_mm_fault+0x3c2/0x8a0 mm/memory.c:5470
do_user_addr_fault arch/x86/mm/fault.c:1413 [inline]
handle_page_fault arch/x86/mm/fault.c:1505 [inline]
exc_page_fault+0x2a8/0x890 arch/x86/mm/fault.c:1563
asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623
RIP: 0010:__get_user_nocheck_2+0xa/0x20 arch/x86/lib/getuser.S:113
Code: 01 ca e9 59 de 0e 00 66 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 0f 01 cb 0f ae e8 <0f> b7 10 31 c0 0f 01 ca e9 29 de 0e 00 66 0f 1f 84 00 00 00 00 00
RSP: 0018:ffffc900095efbc8 EFLAGS: 00050206
RAX: 0000000020000482 RBX: ffff888037e44ca8 RCX: 0000000000040000
RDX: ffffc90013b49000 RSI: 00000000000000df RDI: 00000000000000e0
RBP: ffffc900095efbd0 R08: ffffffff88cb7413 R09: 1ffffffff259cabe
R10: dffffc0000000000 R11: fffffbfff259cabf R12: ffff888037e44dae
R13: dffffc0000000000 R14: ffff888037e44bf8 R15: dffffc0000000000
vhost_get_avail_idx drivers/vhost/vhost.c:1296 [inline]
vhost_enable_notify+0x3b6/0x810 drivers/vhost/vhost.c:2835
vhost_vsock_handle_tx_kick+0x2cf/0xe20 drivers/vhost/vsock.c:513
vhost_worker+0x147/0x1c0 drivers/vhost/vhost.c:411
vhost_task_fn+0x287/0x320 kernel/vhost_task.c:55
ret_from_fork+0x4d/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:243