INFO: task khugepaged:34 blocked for more than 145 seconds.
Not tainted 6.4.0-rc6-syzkaller-00037-gb6dad5178cea #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:khugepaged state:D stack:28168 pid:34 ppid:2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5343 [inline]
__schedule+0xc9a/0x5880 kernel/sched/core.c:6669
schedule+0xde/0x1a0 kernel/sched/core.c:6745
schedule_timeout+0x276/0x2b0 kernel/time/timer.c:2143
do_wait_for_common kernel/sched/completion.c:85 [inline]
__wait_for_common+0x1ce/0x5c0 kernel/sched/completion.c:106
__flush_work+0x595/0xb60 kernel/workqueue.c:3189
__lru_add_drain_all+0x1bf/0x6a0 mm/swap.c:897
khugepaged_do_scan mm/khugepaged.c:2599 [inline]
khugepaged+0x105/0x1740 mm/khugepaged.c:2668
kthread+0x344/0x440 kernel/kthread.c:379
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
Showing all locks held in the system:
2 locks held by kworker/u4:1/12:
#0: ffff888012479138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: ffff888012479138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
#0: ffff888012479138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1324 [inline]
#0: ffff888012479138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:643 [inline]
#0: ffff888012479138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:670 [inline]
#0: ffff888012479138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x883/0x15e0 kernel/workqueue.c:2376
#1: ffff8880b9828848 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x2de/0x950 kernel/sched/psi.c:996
1 lock held by rcu_tasks_kthre/13:
#0: ffffffff8c7984b0 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x31/0xd80 kernel/rcu/tasks.h:518
1 lock held by rcu_tasks_trace/14:
#0: ffffffff8c7981b0 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x31/0xd80 kernel/rcu/tasks.h:518
1 lock held by khungtaskd/28:
#0: ffffffff8c7990c0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x340 kernel/locking/lockdep.c:6559
1 lock held by khugepaged/34:
#0: ffffffff8c89a608 (lock#3){+.+.}-{3:3}, at: __lru_add_drain_all+0x62/0x6a0 mm/swap.c:852
2 locks held by kworker/u4:3/46:
#0: ffff8880b983c5d8 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2f/0x120 kernel/sched/core.c:558
#1: ffffc90000b77db0 ((work_completion)(&sdata->work)){+.+.}-{0:0}, at: psi_task_switch+0x2de/0x950 kernel/sched/psi.c:996
2 locks held by getty/4767:
#0: ffff88802d152098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x26/0x80 drivers/tty/tty_ldisc.c:243
#1: ffffc900015902f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xef4/0x13e0 drivers/tty/n_tty.c:2176
3 locks held by kworker/1:3/5072:
1 lock held by syz-executor.2/27625:
2 locks held by syz-executor.5/27630:
1 lock held by syz-executor.4/27632:
1 lock held by syz-executor.3/27635:
1 lock held by syz-executor.0/27637:
2 locks held by syz-executor.1/27639:
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 28 Comm: khungtaskd Not tainted 6.4.0-rc6-syzkaller-00037-gb6dad5178cea #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/27/2023
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0xd9/0x150 lib/dump_stack.c:106
nmi_cpu_backtrace+0x29c/0x350 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x2a4/0x300 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:222 [inline]
watchdog+0xe16/0x1090 kernel/hung_task.c:379
kthread+0x344/0x440 kernel/kthread.c:379
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 27639 Comm: syz-executor.1 Not tainted 6.4.0-rc6-syzkaller-00037-gb6dad5178cea #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/27/2023
RIP: 0010:unwind_next_frame+0x3bf/0x1e30 arch/x86/kernel/unwind_orc.c:467
Code: c7 c2 84 aa fb 8e 4c 89 f9 48 c7 c6 84 aa fb 8e 48 81 ea 28 de 85 8e 48 c7 c7 28 de 85 8e 48 c1 fa 02 e8 d4 f5 ff ff 48 89 c1 <48> 85 c9 0f 84 a0 02 00 00 4c 8d 79 05 48 b8 00 00 00 00 00 fc ff
RSP: 0018:ffffc9000354eef8 EFLAGS: 00000286
RAX: ffffffff8f0eb140 RBX: 0000000000000001 RCX: ffffffff8f0eb140
RDX: 0000000000000000 RSI: ffffffff8f0eb11c RDI: ffffffff8e928d38
RBP: ffffc9000354efb0 R08: ffffffff8f0eb11c R09: ffffc9000354f190
R10: ffffc9000354ef68 R11: 0000000000094001 R12: ffffc9000354efb8
R13: ffffc9000354ef68 R14: ffffc9000354ef9d R15: ffffffff81e01e8e
FS: 00007f5d2db20700(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f5d2daff718 CR3: 0000000043695000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
arch_stack_walk+0x81/0xf0 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0x90/0xc0 kernel/stacktrace.c:122
save_stack+0x151/0x1e0 mm/page_owner.c:128
__set_page_owner+0x1f/0x60 mm/page_owner.c:192
set_page_owner include/linux/page_owner.h:31 [inline]
post_alloc_hook+0x2db/0x350 mm/page_alloc.c:1731
prep_new_page mm/page_alloc.c:1738 [inline]
get_page_from_freelist+0xf41/0x2c00 mm/page_alloc.c:3502
__alloc_pages+0x1cb/0x4a0 mm/page_alloc.c:4768
alloc_pages+0x1aa/0x270 mm/mempolicy.c:2279
__get_free_pages+0xc/0x40 mm/page_alloc.c:4818
kasan_populate_vmalloc_pte mm/kasan/shadow.c:323 [inline]
kasan_populate_vmalloc_pte+0x2e/0x180 mm/kasan/shadow.c:314
apply_to_pte_range mm/memory.c:2584 [inline]
apply_to_pmd_range mm/memory.c:2628 [inline]
apply_to_pud_range mm/memory.c:2664 [inline]
apply_to_p4d_range mm/memory.c:2700 [inline]
__apply_to_page_range+0x68c/0x1030 mm/memory.c:2734
alloc_vmap_area+0x500/0x1e00 mm/vmalloc.c:1642
__get_vm_area_node+0x145/0x3f0 mm/vmalloc.c:2551
__vmalloc_node_range+0x252/0x14a0 mm/vmalloc.c:3217
vmalloc_user+0x6b/0x80 mm/vmalloc.c:3411
vb2_vmalloc_alloc+0x121/0x3f0 drivers/media/common/videobuf2/videobuf2-vmalloc.c:48
__vb2_buf_mem_alloc drivers/media/common/videobuf2/videobuf2-core.c:233 [inline]
__vb2_queue_alloc+0x60c/0x1270 drivers/media/common/videobuf2/videobuf2-core.c:444
vb2_core_create_bufs+0x5bd/0xb10 drivers/media/common/videobuf2/videobuf2-core.c:962
vb2_create_bufs+0x454/0x800 drivers/media/common/videobuf2/videobuf2-v4l2.c:794
v4l_create_bufs drivers/media/v4l2-core/v4l2-ioctl.c:2141 [inline]
v4l_create_bufs+0xb6/0x160 drivers/media/v4l2-core/v4l2-ioctl.c:2128
__video_do_ioctl+0xba6/0xf20 drivers/media/v4l2-core/v4l2-ioctl.c:3044
video_usercopy+0x4bf/0x14c0 drivers/media/v4l2-core/v4l2-ioctl.c:3385
v4l2_ioctl+0x1b7/0x250 drivers/media/v4l2-core/v4l2-dev.c:364
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:870 [inline]
__se_sys_ioctl fs/ioctl.c:856 [inline]
__x64_sys_ioctl+0x197/0x210 fs/ioctl.c:856
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f5d2ce8c149
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f5d2db20168 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f5d2cfabf80 RCX: 00007f5d2ce8c149
RDX: 0000000020000100 RSI: 00000000c100565c RDI: 0000000000000003
RBP: 00007f5d2cee7cad R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f5d2d0cfb1f R14: 00007f5d2db20300 R15: 0000000000022000