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BUG: KCSAN: data-race in list_lru_add / list_lru_count_one

read to 0xffff88812b1ea018 of 8 bytes by task 9408 on cpu 0:
 list_lru_count_one+0xbd/0x130 mm/list_lru.c:193
 list_lru_shrink_count include/linux/list_lru.h:123 [inline]
 count_shadow_nodes+0x51/0x4a0 mm/workingset.c:437
 do_shrink_slab+0xb7/0x5a0 mm/vmscan.c:444
 shrink_slab mm/vmscan.c:687 [inline]
 shrink_slab+0x147/0x540 mm/vmscan.c:660
 shrink_node_memcgs mm/vmscan.c:2687 [inline]
 shrink_node+0x34a/0xfe0 mm/vmscan.c:2791
 shrink_zones mm/vmscan.c:2996 [inline]
 do_try_to_free_pages+0x245/0xb60 mm/vmscan.c:3049
 try_to_free_pages+0x1f5/0x4a0 mm/vmscan.c:3288
 __perform_reclaim mm/page_alloc.c:4124 [inline]
 __alloc_pages_direct_reclaim mm/page_alloc.c:4145 [inline]
 __alloc_pages_slowpath+0x45c/0xee0 mm/page_alloc.c:4562
 __alloc_pages_nodemask+0x2c8/0x310 mm/page_alloc.c:4776
 alloc_pages_current+0xd1/0x170 mm/mempolicy.c:2207
 alloc_pages include/linux/gfp.h:532 [inline]
 __vmalloc_area_node mm/vmalloc.c:2483 [inline]
 __vmalloc_node_range+0x2d7/0x4c0 mm/vmalloc.c:2547
 vmalloc_user+0x65/0x80 mm/vmalloc.c:2682
 vb2_vmalloc_alloc+0xb1/0x1a0 drivers/media/common/videobuf2/videobuf2-vmalloc.c:48
 __vb2_buf_mem_alloc drivers/media/common/videobuf2/videobuf2-core.c:215 [inline]
 __vb2_queue_alloc+0x36b/0x850 drivers/media/common/videobuf2/videobuf2-core.c:370
 vb2_core_create_bufs+0x205/0x5b0 drivers/media/common/videobuf2/videobuf2-core.c:849
 vb2_create_bufs+0x1fb/0x310 drivers/media/common/videobuf2/videobuf2-v4l2.c:750
 vb2_ioctl_create_bufs+0x18d/0x200 drivers/media/common/videobuf2/videobuf2-v4l2.c:955
 v4l_create_bufs drivers/media/v4l2-core/v4l2-ioctl.c:2022 [inline]
 v4l_create_bufs+0xa9/0x110 drivers/media/v4l2-core/v4l2-ioctl.c:2009
 __video_do_ioctl+0x3e1/0x720 drivers/media/v4l2-core/v4l2-ioctl.c:2925
 video_usercopy+0x418/0xa40 drivers/media/v4l2-core/v4l2-ioctl.c:3107
 video_ioctl2+0x36/0x49 drivers/media/v4l2-core/v4l2-ioctl.c:3151
 v4l2_ioctl+0xe1/0x110 drivers/media/v4l2-core/v4l2-dev.c:360
 vfs_ioctl fs/ioctl.c:47 [inline]
 file_ioctl fs/ioctl.c:545 [inline]
 do_vfs_ioctl+0x84f/0xcf0 fs/ioctl.c:732
 ksys_ioctl+0xbd/0xe0 fs/ioctl.c:749
 __do_sys_ioctl fs/ioctl.c:756 [inline]
 __se_sys_ioctl fs/ioctl.c:754 [inline]
 __x64_sys_ioctl+0x4c/0x60 fs/ioctl.c:754
 do_syscall_64+0xcc/0x3a0 arch/x86/entry/common.c:294
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

write to 0xffff88812b1ea018 of 8 bytes by task 7864 on cpu 1:
 list_lru_add+0x20e/0x450 mm/list_lru.c:137
 workingset_update_node mm/workingset.c:419 [inline]
 workingset_update_node+0x115/0x130 mm/workingset.c:405
 xas_update lib/xarray.c:349 [inline]
 update_node lib/xarray.c:750 [inline]
 xas_store+0x20f/0xd00 lib/xarray.c:837
 page_cache_delete mm/filemap.c:137 [inline]
 __delete_from_page_cache+0x174/0x4a0 mm/filemap.c:238
 __remove_mapping+0x2db/0x530 mm/vmscan.c:939
 shrink_page_list+0xf57/0x2710 mm/vmscan.c:1439
 shrink_inactive_list+0x3d1/0x920 mm/vmscan.c:1959
 shrink_list mm/vmscan.c:2178 [inline]
 shrink_lruvec+0x4c8/0xd20 mm/vmscan.c:2496
 shrink_node_memcgs mm/vmscan.c:2685 [inline]
 shrink_node+0x2fe/0xfe0 mm/vmscan.c:2791
 shrink_zones mm/vmscan.c:2996 [inline]
 do_try_to_free_pages+0x245/0xb60 mm/vmscan.c:3049
 try_to_free_pages+0x1f5/0x4a0 mm/vmscan.c:3288
 __perform_reclaim mm/page_alloc.c:4124 [inline]
 __alloc_pages_direct_reclaim mm/page_alloc.c:4145 [inline]
 __alloc_pages_slowpath+0x45c/0xee0 mm/page_alloc.c:4562
 __alloc_pages_nodemask+0x2c8/0x310 mm/page_alloc.c:4776
 alloc_pages_current+0xd1/0x170 mm/mempolicy.c:2207
 alloc_pages include/linux/gfp.h:532 [inline]
 __page_cache_alloc mm/filemap.c:981 [inline]
 __page_cache_alloc+0x183/0x1a0 mm/filemap.c:966
 __do_page_cache_readahead+0x13e/0x390 mm/readahead.c:196
 ra_submit mm/internal.h:62 [inline]
 do_sync_mmap_readahead mm/filemap.c:2422 [inline]
 filemap_fault+0xe8b/0x10a0 mm/filemap.c:2508
 ext4_filemap_fault+0x59/0x72 fs/ext4/inode.c:5977
 __do_fault+0xae/0x1f0 mm/memory.c:3188
 do_read_fault mm/memory.c:3585 [inline]
 do_fault mm/memory.c:3714 [inline]
 handle_pte_fault mm/memory.c:3945 [inline]
 __handle_mm_fault+0x270d/0x2e00 mm/memory.c:4075
 handle_mm_fault+0x21b/0x530 mm/memory.c:4112
 do_user_addr_fault arch/x86/mm/fault.c:1441 [inline]
 __do_page_fault+0x456/0x8d0 arch/x86/mm/fault.c:1506
 do_page_fault+0x38/0x194 arch/x86/mm/fault.c:1530
 page_fault+0x34/0x40 arch/x86/entry/entry_64.S:1203

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 7864 Comm: rsyslogd Not tainted 5.5.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
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