syzbot


INFO: task hung in __vmalloc_area_node

Status: auto-closed as invalid on 2021/08/11 09:30
Reported-by: syzbot+7479120bb2e19e3a15c4@syzkaller.appspotmail.com
First crash: 442d, last: 442d

Sample crash report:
 page_fault+0x45/0x50 arch/x86/entry/entry_64.S:1123
RIP: 0f00:0x25808cec059
RSP: 2e800:000000c000039f28 EFLAGS: 00000003
INFO: task kworker/0:6:8460 blocked for more than 140 seconds.
Mem-Info:
active_anon:18889 inactive_anon:9852 isolated_anon:0
 active_file:21 inactive_file:1 isolated_file:0
 unevictable:0 dirty:0 writeback:0 unstable:0
 slab_reclaimable:14318 slab_unreclaimable:113975
 mapped:52225 shmem:13077 pagetables:695 bounce:0
 free:13947 free_pcp:109 free_cma:0
syz-executor.1: 
Node 0 active_anon:74544kB inactive_anon:36716kB active_file:68kB inactive_file:0kB unevictable:0kB isolated(anon):0kB isolated(file):0kB mapped:174084kB dirty:0kB writeback:0kB shmem:49600kB shmem_thp: 0kB shmem_pmdmapped: 0kB anon_thp: 14336kB writeback_tmp:0kB unstable:0kB all_unreclaimable? yes
      Not tainted 4.14.230-syzkaller #0
vmalloc: allocation failure, allocated 2910875648 of 3076165632 bytes, mode:0x14080c0(GFP_KERNEL|__GFP_ZERO), nodemask=(null)
Node 1 active_anon:1012kB inactive_anon:2692kB active_file:16kB inactive_file:16kB unevictable:0kB isolated(anon):0kB isolated(file):0kB mapped:34816kB dirty:0kB writeback:0kB shmem:2708kB shmem_thp: 0kB shmem_pmdmapped: 0kB anon_thp: 0kB writeback_tmp:0kB unstable:0kB all_unreclaimable? yes
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.1 cpuset=/ mems_allowed=0-1
CPU: 1 PID: 31679 Comm: syz-executor.1 Not tainted 4.14.230-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
kworker/0:6     D
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0x1b2/0x281 lib/dump_stack.c:58
28432  8460      2 0x80000000
Workqueue: usb_hub_wq hub_event
 warn_alloc.cold+0x96/0x1cc mm/page_alloc.c:3255
 __vmalloc_area_node+0x48a/0x680 mm/vmalloc.c:1726
Call Trace:
 context_switch kernel/sched/core.c:2808 [inline]
 __schedule+0x88b/0x1de0 kernel/sched/core.c:3384
 __vmalloc_node_range+0xbe/0x150 mm/vmalloc.c:1767
 __vmalloc_node mm/vmalloc.c:1818 [inline]
 vmalloc_user+0x47/0xa0 mm/vmalloc.c:1888
 vb2_vmalloc_alloc+0xa6/0x2d0 drivers/media/v4l2-core/videobuf2-vmalloc.c:48
 __vb2_buf_mem_alloc drivers/media/v4l2-core/videobuf2-core.c:208 [inline]
 __vb2_queue_alloc+0x47a/0xd90 drivers/media/v4l2-core/videobuf2-core.c:361
 schedule+0x8d/0x1b0 kernel/sched/core.c:3428
 vb2_core_create_bufs+0x279/0x5a0 drivers/media/v4l2-core/videobuf2-core.c:818
 usb_kill_urb.part.0+0x125/0x190 drivers/usb/core/urb.c:691
 vb2_create_bufs+0x2e1/0x5b0 drivers/media/v4l2-core/videobuf2-v4l2.c:555
 vb2_ioctl_create_bufs+0x1f7/0x330 drivers/media/v4l2-core/videobuf2-v4l2.c:746
 v4l_create_bufs drivers/media/v4l2-core/v4l2-ioctl.c:1906 [inline]
 v4l_create_bufs+0xa4/0x150 drivers/media/v4l2-core/v4l2-ioctl.c:1893
 __video_do_ioctl+0x65b/0x6a0 drivers/media/v4l2-core/v4l2-ioctl.c:2738
 usb_kill_urb+0x7c/0x90 drivers/usb/core/urb.c:686
 usb_start_wait_urb+0x209/0x440 drivers/usb/core/message.c:62
 video_usercopy+0xfd/0xe70 drivers/media/v4l2-core/v4l2-ioctl.c:2908
 v4l2_ioctl+0x1bb/0x2f0 drivers/media/v4l2-core/v4l2-dev.c:360
 vfs_ioctl fs/ioctl.c:46 [inline]
 file_ioctl fs/ioctl.c:500 [inline]
 do_vfs_ioctl+0x75a/0xff0 fs/ioctl.c:684
 SYSC_ioctl fs/ioctl.c:701 [inline]
 SyS_ioctl+0x7f/0xb0 fs/ioctl.c:692
 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x46/0xbb
RIP: 0033:0x466459
RSP: 002b:00007f54a2a0c188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 000000000056bf60 RCX: 0000000000466459
RDX: 0000000020000100 RSI: 00000000c100565c RDI: 0000000000000005
RBP: 00000000004bf9fb R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf60
R13: 00007fff3477194f R14: 00007f54a2a0c300 R15: 0000000000022000
Node 0 
 usb_internal_control_msg drivers/usb/core/message.c:100 [inline]
 usb_control_msg+0x302/0x450 drivers/usb/core/message.c:151
DMA free:10968kB min:204kB low:252kB high:300kB active_anon:0kB inactive_anon:0kB active_file:0kB inactive_file:0kB unevictable:0kB writepending:0kB present:15992kB managed:15908kB mlocked:0kB kernel_stack:0kB pagetables:0kB bounce:0kB free_pcp:0kB local_pcp:0kB free_cma:0kB
lowmem_reserve[]:
 0
 hub_port_init+0xfdc/0x2970 drivers/usb/core/hub.c:4555
 2717
net_ratelimit: 9 callbacks suppressed
ICMPv6: ndisc: ndisc_alloc_skb failed to allocate an skb
ICMPv6: ndisc: ndisc_alloc_skb failed to allocate an skb
 2718
 hub_port_connect drivers/usb/core/hub.c:4905 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5088 [inline]
 port_event drivers/usb/core/hub.c:5194 [inline]
 hub_event+0x18fd/0x3d70 drivers/usb/core/hub.c:5274
 2718
ICMPv6: ndisc: ndisc_alloc_skb failed to allocate an skb
ICMPv6: ndisc: ndisc_alloc_skb failed to allocate an skb
 2718
Node 0 DMA32 free:17992kB min:36200kB low:45248kB high:54296kB active_anon:74544kB inactive_anon:36716kB active_file:36kB inactive_file:20kB unevictable:0kB writepending:0kB present:3129332kB managed:2788132kB mlocked:0kB kernel_stack:7136kB pagetables:2412kB bounce:0kB free_pcp:280kB local_pcp:180kB free_cma:0kB
lowmem_reserve[]: 0 0 0 0 0
 process_one_work+0x793/0x14a0 kernel/workqueue.c:2116
ICMPv6: ndisc: ndisc_alloc_skb failed to allocate an skb
ICMPv6: ndisc: ndisc_alloc_skb failed to allocate an skb
ICMPv6: ndisc: ndisc_alloc_skb failed to allocate an skb
Node 0 
 worker_thread+0x5cc/0xff0 kernel/workqueue.c:2250
 kthread+0x30d/0x420 kernel/kthread.c:232
ICMPv6: ndisc: ndisc_alloc_skb failed to allocate an skb
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:404

Showing all locks held in the system:
Normal free:0kB min:4kB low:4kB high:4kB active_anon:0kB inactive_anon:0kB active_file:0kB inactive_file:0kB unevictable:0kB writepending:0kB present:1048576kB managed:516kB mlocked:0kB kernel_stack:0kB pagetables:0kB bounce:0kB free_pcp:0kB local_pcp:0kB free_cma:0kB
2 locks held by systemd/1:
 #0:  (&mm->mmap_sem){++++}, at: [<ffffffff81240379>] __do_page_fault+0x2b9/0xad0 arch/x86/mm/fault.c:1371
 #1:  (&ei->i_mmap_sem){++++}, at: [<ffffffff81bbec0c>] ext4_filemap_fault+0x7c/0xb0 fs/ext4/inode.c:6246
3 locks held by netns/21:
ICMPv6: ndisc: ndisc_alloc_skb failed to allocate an skb
 #0:  ("%s""netns"){+.+.}, at: [<ffffffff813639b0>] process_one_work+0x6b0/0x14a0 kernel/workqueue.c:2087
ICMPv6: ndisc: ndisc_alloc_skb failed to allocate an skb
 #1:  (net_cleanup_work){+.+.}, at: [<ffffffff813639e6>] process_one_work+0x6e6/0x14a0 kernel/workqueue.c:2091
 #2:  (net_mutex){+.+.}, at: [<ffffffff85c0db70>] cleanup_net+0x110/0x840 net/core/net_namespace.c:450
1 lock held by khungtaskd/1533:
 #0:  (tasklist_lock){.+.+}, at: [<ffffffff87007097>] debug_show_all_locks+0x7c/0x21a kernel/locking/lockdep.c:4548
1 lock held by oom_reaper/1534:
 #0:  (oom_lock){+.+.}, at: [<ffffffff81698122>] oom_reap_task_mm mm/oom_kill.c:526 [inline]
 #0:  (oom_lock){+.+.}, at: [<ffffffff81698122>] oom_reap_task mm/oom_kill.c:585 [inline]
 #0:  (oom_lock){+.+.}, at: [<ffffffff81698122>] oom_reaper+0x1a2/0x1000 mm/oom_kill.c:622
2 locks held by syz-fuzzer/7962:
 #0:  (&mm->mmap_sem){++++}, at: [<ffffffff81240379>] __do_page_fault+0x2b9/0xad0 arch/x86/mm/fault.c:1371
lowmem_reserve[]:
 #1:  (&ei->i_mmap_sem){++++}, at: [<ffffffff81bbec0c>] ext4_filemap_fault+0x7c/0xb0 fs/ext4/inode.c:6246
5 locks held by kworker/0:6/8460:
 #0:  ("usb_hub_wq"){+.+.}, at: [<ffffffff813639b0>] process_one_work+0x6b0/0x14a0 kernel/workqueue.c:2087
 #1:  ((&hub->events)){+.+.}, at: [<ffffffff813639e6>] process_one_work+0x6e6/0x14a0 kernel/workqueue.c:2091
 #2:  (&dev->mutex){....}, at: [<ffffffff8444ec38>] device_lock include/linux/device.h:1081 [inline]
 #2:  (&dev->mutex){....}, at: [<ffffffff8444ec38>] hub_event+0x108/0x3d70 drivers/usb/core/hub.c:5220
 #3:  (&port_dev->status_lock){+.+.}, at: [<ffffffff84450418>] usb_lock_port drivers/usb/core/hub.c:2934 [inline]
 #3:  (&port_dev->status_lock){+.+.}, at: [<ffffffff84450418>] hub_port_connect drivers/usb/core/hub.c:4904 [inline]
 #3:  (&port_dev->status_lock){+.+.}, at: [<ffffffff84450418>] hub_port_connect_change drivers/usb/core/hub.c:5088 [inline]
 #3:  (&port_dev->status_lock){+.+.}, at: [<ffffffff84450418>] port_event drivers/usb/core/hub.c:5194 [inline]
 #3:  (&port_dev->status_lock){+.+.}, at: [<ffffffff84450418>] hub_event+0x18e8/0x3d70 drivers/usb/core/hub.c:5274
 #4:  (hcd->address0_mutex){+.+.}, at: [<ffffffff8444473b>] hub_port_init+0x15b/0x2970 drivers/usb/core/hub.c:4429
2 locks held by kworker/u4:1/6965:
 #0:  ("events_unbound"){+.+.}, at: [<ffffffff813639b0>] process_one_work+0x6b0/0x14a0 kernel/workqueue.c:2087
 #1:  ((&sub_info->work)){+.+.}, at: [<ffffffff813639e6>] process_one_work+0x6e6/0x14a0 kernel/workqueue.c:2091
2 locks held by kworker/u4:4/8346:
 #0:  ("events_unbound"){+.+.}, at: [<ffffffff813639b0>] process_one_work+0x6b0/0x14a0 kernel/workqueue.c:2087
 #1:  ((&sub_info->work)){+.+.}, at: [<ffffffff813639e6>] process_one_work+0x6e6/0x14a0 kernel/workqueue.c:2091
2 locks held by kworker/0:4/16038:
 #0:  ("events"){+.+.}, at: [<ffffffff813639b0>] process_one_work+0x6b0/0x14a0 kernel/workqueue.c:2087
 #1:  ((&cgrp->release_agent_work)){+.+.}, at: [<ffffffff813639e6>] process_one_work+0x6e6/0x14a0 kernel/workqueue.c:2091
2 locks held by kworker/u4:0/31609:
 #0:  ("events_unbound"){+.+.}, at: [<ffffffff813639b0>] process_one_work+0x6b0/0x14a0 kernel/workqueue.c:2087
 #1:  ((&sub_info->work)){+.+.}, at: [<ffffffff813639e6>] process_one_work+0x6e6/0x14a0 kernel/workqueue.c:2091
2 locks held by syz-executor.0/31691:
 #0: 
 0
 (&mm->mmap_sem){++++}, at: [<ffffffff81240379>] __do_page_fault+0x2b9/0xad0 arch/x86/mm/fault.c:1371
 #1:  (&ei->i_mmap_sem){++++}, at: [<ffffffff81bbec0c>] ext4_filemap_fault+0x7c/0xb0 fs/ext4/inode.c:6246
1 lock held by syz-executor.0/32347:
 0
 #0: 
 0
 (&vcap->lock){+.+.}, at: [<ffffffff84c10268>] _vb2_fop_release+0x38/0x280 drivers/media/v4l2-core/videobuf2-v4l2.c:838

=============================================

 0
Mem-Info:
active_anon:18889 inactive_anon:9852 isolated_anon:0
 active_file:11 inactive_file:11 isolated_file:0
 unevictable:0 dirty:0 writeback:0 unstable:0
 slab_reclaimable:14318 slab_unreclaimable:113978
 mapped:52225 shmem:13077 pagetables:695 bounce:0
 free:13947 free_pcp:106 free_cma:0
 0
Node 0 active_anon:74544kB inactive_anon:36716kB active_file:28kB inactive_file:28kB unevictable:0kB isolated(anon):0kB isolated(file):0kB mapped:174084kB dirty:0kB writeback:0kB shmem:49600kB shmem_thp: 0kB shmem_pmdmapped: 0kB anon_thp: 14336kB writeback_tmp:0kB unstable:0kB all_unreclaimable? yes
Node 1 Normal free:26828kB min:53696kB low:67120kB high:80544kB active_anon:1012kB inactive_anon:2692kB active_file:16kB inactive_file:16kB unevictable:0kB writepending:0kB present:4194304kB managed:4128256kB mlocked:0kB kernel_stack:288kB pagetables:368kB bounce:0kB free_pcp:152kB local_pcp:32kB free_cma:0kB
Node 1 active_anon:1012kB inactive_anon:2692kB active_file:16kB inactive_file:16kB unevictable:0kB isolated(anon):0kB isolated(file):0kB mapped:34816kB dirty:0kB writeback:0kB shmem:2708kB shmem_thp: 0kB shmem_pmdmapped: 0kB anon_thp: 0kB writeback_tmp:0kB unstable:0kB all_unreclaimable? yes
Bluetooth: hci1 command 0x040f tx timeout
lowmem_reserve[]:
Node 0 DMA free:10968kB min:204kB low:252kB high:300kB active_anon:0kB inactive_anon:0kB active_file:0kB inactive_file:0kB unevictable:0kB writepending:0kB present:15992kB managed:15908kB mlocked:0kB kernel_stack:0kB pagetables:0kB bounce:0kB free_pcp:0kB local_pcp:0kB free_cma:0kB
 0
lowmem_reserve[]: 0 2717 2718 2718 2718
Node 0 DMA32 free:18408kB min:36200kB low:45248kB high:54296kB active_anon:74544kB inactive_anon:36716kB active_file:28kB inactive_file:28kB unevictable:0kB writepending:0kB present:3129332kB managed:2788132kB mlocked:0kB kernel_stack:7136kB pagetables:2412kB bounce:0kB free_pcp:272kB local_pcp:100kB free_cma:0kB
 0
lowmem_reserve[]: 0 0 0 0 0
Node 0 Normal free:0kB min:4kB low:4kB high:4kB active_anon:0kB inactive_anon:0kB active_file:0kB inactive_file:0kB unevictable:0kB writepending:0kB present:1048576kB managed:516kB mlocked:0kB kernel_stack:0kB pagetables:0kB bounce:0kB free_pcp:0kB local_pcp:0kB free_cma:0kB
 0
lowmem_reserve[]: 0 0 0 0 0
Node 1 Normal free:26828kB min:53696kB low:67120kB high:80544kB active_anon:1012kB inactive_anon:2692kB active_file:16kB inactive_file:12kB unevictable:0kB writepending:0kB present:4194304kB managed:4128256kB mlocked:0kB kernel_stack:288kB pagetables:368kB bounce:0kB free_pcp:152kB local_pcp:120kB free_cma:0kB
 0
lowmem_reserve[]: 0 0 0 0 0
Node 0 DMA: 0*4kB 1*8kB (U) 1*16kB (U) 0*32kB 1*64kB (U) 1*128kB (U) 0*256kB 1*512kB (U) 0*1024kB 1*2048kB (M) 2*4096kB (M) = 10968kB
 0
Node 0 DMA32: 1228*4kB (UME) 1017*8kB (UME) 279*16kB (UME) 30*32kB (UME) 0*64kB 0*128kB 0*256kB 0*512kB 0*1024kB 0*2048kB 0*4096kB = 18472kB
Node 0 
Node 0 Normal: 0*4kB 0*8kB 0*16kB 0*32kB 0*64kB 0*128kB 0*256kB 0*512kB 0*1024kB 0*2048kB 0*4096kB = 0kB
DMA: 
Node 1 Normal: 115*4kB (UM) 86*8kB (UM) 63*16kB (ME) 55*32kB (UME) 44*64kB (ME) 21*128kB (UM) 12*256kB (M) 6*512kB (M) 3*1024kB (UME) 0*2048kB 2*4096kB (UM) = 26828kB
0*4kB 
Node 0 hugepages_total=0 hugepages_free=0 hugepages_surp=0 hugepages_size=1048576kB
NMI backtrace for cpu 0
CPU: 0 PID: 1533 Comm: khungtaskd Not tainted 4.14.230-syzkaller #0
1*8kB 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0x1b2/0x281 lib/dump_stack.c:58
 nmi_cpu_backtrace.cold+0x57/0x93 lib/nmi_backtrace.c:101
 nmi_trigger_cpumask_backtrace+0x13a/0x180 lib/nmi_backtrace.c:62
 trigger_all_cpu_backtrace include/linux/nmi.h:140 [inline]
 check_hung_uninterruptible_tasks kernel/hung_task.c:195 [inline]
 watchdog+0x5b9/0xb40 kernel/hung_task.c:274
(U) 
 kthread+0x30d/0x420 kernel/kthread.c:232
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:404
Sending NMI from CPU 0 to CPUs 1:
1*16kB 
NMI backtrace for cpu 1
CPU: 1 PID: 7964 Comm: syz-fuzzer Not tainted 4.14.230-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff88809c75a140 task.stack: ffff8880969a0000
RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:779 [inline]
RIP: 0010:lock_release+0x41e/0x870 kernel/locking/lockdep.c:4020
RSP: 0000:ffff8880ba507c90 EFLAGS: 00000086
RAX: 1ffffffff11e1259 RBX: 1ffff110174a0f95 RCX: 1ffff110138eb54d
RDX: dffffc0000000000 RSI: 0000000000000005 RDI: 0000000000000086
RBP: ffff88809c75a140 R08: ffffffff8b9b3430 R09: 0000000000000004
R10: 0000000000000000 R11: ffff88809c75a140 R12: 4f45c28245dbbff6
R13: 0000000000000003 R14: ffff88809c75a140 R15: 0000000000000005
FS:  000000c00002e890(0000) GS:ffff8880ba500000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000488e10 CR3: 00000000a1b03000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:158 [inline]
 _raw_spin_unlock_irqrestore+0x1b/0xe0 kernel/locking/spinlock.c:192
 debug_object_deactivate lib/debugobjects.c:530 [inline]
 debug_object_deactivate+0x1da/0x2e0 lib/debugobjects.c:491
 debug_timer_deactivate kernel/time/timer.c:698 [inline]
 debug_deactivate kernel/time/timer.c:750 [inline]
 detach_timer kernel/time/timer.c:790 [inline]
 expire_timers+0xf3/0x4d0 kernel/time/timer.c:1308
 __run_timers kernel/time/timer.c:1637 [inline]
 run_timer_softirq+0x1d5/0x5a0 kernel/time/timer.c:1650
 __do_softirq+0x24d/0x9ff kernel/softirq.c:288
 invoke_softirq kernel/softirq.c:368 [inline]
 irq_exit+0x193/0x240 kernel/softirq.c:409
 exiting_irq arch/x86/include/asm/apic.h:638 [inline]
 smp_apic_timer_interrupt+0x141/0x5e0 arch/x86/kernel/apic/apic.c:1106
 apic_timer_interrupt+0x93/0xa0 arch/x86/entry/entry_64.S:793
 </IRQ>
RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:779 [inline]
RIP: 0010:console_trylock_spinning kernel/printk/printk.c:1685 [inline]
RIP: 0010:vprintk_emit+0x549/0x620 kernel/printk/printk.c:1922
RSP: 0000:ffff8880969a7510 EFLAGS: 00000297 ORIG_RAX: ffffffffffffff10
RAX: ffff88809c75a140 RBX: 1ffffffff11e1259 RCX: 1ffff110138eb547
RDX: 0000000000000000 RSI: ffff88809c75aa18 RDI: 0000000000000297
RBP: ffff8880969a7548 R08: ffffffff8b9a4f88 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000007
R13: ffff8880b31e2580 R14: 0000000000000297 R15: 0000000000000000
 vprintk_func+0x58/0x160 kernel/printk/printk_safe.c:409
 printk+0x9e/0xbc kernel/printk/printk.c:1996
 show_free_areas.cold+0xbd5/0x1275 mm/page_alloc.c:4847
 show_mem+0x34/0x177 lib/show_mem.c:18
 dump_header+0x1e2/0x82f mm/oom_kill.c:428
 oom_kill_process.cold+0x10/0xa40 mm/oom_kill.c:863
 out_of_memory mm/oom_kill.c:1075 [inline]
 out_of_memory+0xe3e/0x1190 mm/oom_kill.c:1025
 __alloc_pages_may_oom mm/page_alloc.c:3351 [inline]
 __alloc_pages_slowpath mm/page_alloc.c:4040 [inline]
 __alloc_pages_nodemask+0x23e1/0x2720 mm/page_alloc.c:4205
 alloc_pages_current+0x155/0x260 mm/mempolicy.c:2113
 alloc_pages include/linux/gfp.h:520 [inline]
 __page_cache_alloc mm/filemap.c:871 [inline]
 page_cache_read mm/filemap.c:2296 [inline]
 filemap_fault+0x11a1/0x1ad0 mm/filemap.c:2480
 ext4_filemap_fault+0x84/0xb0 fs/ext4/inode.c:6247
 __do_fault+0xfa/0x380 mm/memory.c:3316
 do_read_fault mm/memory.c:3726 [inline]
 do_fault mm/memory.c:3852 [inline]
 handle_pte_fault mm/memory.c:4082 [inline]
 __handle_mm_fault+0x2497/0x4620 mm/memory.c:4206
 handle_mm_fault+0x455/0x9c0 mm/memory.c:4243
 __do_page_fault+0x549/0xad0 arch/x86/mm/fault.c:1442
 page_fault+0x45/0x50 arch/x86/entry/entry_64.S:1123
RIP: 0f00:0x25808cec059
RSP: 2e800:000000c000039f28 EFLAGS: 00000003
Code: 85 84 08 00 00 00 00 00 00 48 c1 e8 03 80 3c 10 00 0f 85 88 03 00 00 48 83 3d 86 d8 ae 07 00 0f 84 ba 01 00 00 48 8b 3c 24 57 9d <0f> 1f 44 00 00 48 b8 00 00 00 00 00 fc ff df 48 c7 04 03 00 00 
Node 0 hugepages_total=0 hugepages_free=0 hugepages_surp=0 hugepages_size=2048kB
(U) 
Node 1 hugepages_total=0 hugepages_free=0 hugepages_surp=0 hugepages_size=1048576kB
0*32kB 

Crashes (1):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Title
ci2-linux-4-14 2021/04/13 09:29 linux-4.14.y 958e517f4e16 6a81331a .config log report info INFO: task hung in __vmalloc_area_node