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BUG: KCSAN: data-race in __es_shrink / __es_shrink

write to 0xffff8881444e2c78 of 8 bytes by task 8451 on cpu 0:
 __es_shrink+0x3a0/0x560 fs/ext4/extents_status.c:1536
 ext4_es_scan+0x87/0x210 fs/ext4/extents_status.c:1580
 do_shrink_slab+0x28b/0x550 mm/vmscan.c:511
 shrink_slab+0xea/0x1c0 mm/vmscan.c:672
 shrink_node_memcgs+0x27a/0x410 mm/vmscan.c:2665
 shrink_node+0x9fa/0x1210 mm/vmscan.c:2780
 shrink_zones+0x29f/0x470 mm/vmscan.c:2983
 do_try_to_free_pages+0x193/0x6f0 mm/vmscan.c:3038
 try_to_free_pages+0x399/0x870 mm/vmscan.c:3277
 __perform_reclaim mm/page_alloc.c:4377 [inline]
 __alloc_pages_direct_reclaim mm/page_alloc.c:4398 [inline]
 __alloc_pages_slowpath+0x52f/0x9c0 mm/page_alloc.c:4802
 __alloc_pages_nodemask+0x269/0x350 mm/page_alloc.c:5012
 alloc_pages_current+0x21d/0x310 mm/mempolicy.c:2267
 alloc_pages include/linux/gfp.h:547 [inline]
 __page_cache_alloc+0x4d/0xf0 mm/filemap.c:977
 pagecache_get_page+0x554/0x980 mm/filemap.c:1837
 filemap_fault+0x1ef/0xbf0 mm/filemap.c:2823
 ext4_filemap_fault+0x4b/0x60 fs/ext4/inode.c:6205
 __do_fault mm/memory.c:3625 [inline]
 do_read_fault+0x403/0x760 mm/memory.c:4019
 do_fault mm/memory.c:4147 [inline]
 handle_pte_fault mm/memory.c:4387 [inline]
 __handle_mm_fault mm/memory.c:4522 [inline]
 handle_mm_fault+0xff1/0x17b0 mm/memory.c:4620
 do_user_addr_fault+0x433/0x830 arch/x86/mm/fault.c:1393
 handle_page_fault arch/x86/mm/fault.c:1450 [inline]
 exc_page_fault+0x94/0x2a0 arch/x86/mm/fault.c:1506
 asm_exc_page_fault+0x1e/0x30 arch/x86/include/asm/idtentry.h:580

read to 0xffff8881444e2c78 of 8 bytes by task 5334 on cpu 1:
 __es_shrink+0x374/0x560 fs/ext4/extents_status.c:1536
 ext4_es_scan+0x87/0x210 fs/ext4/extents_status.c:1580
 do_shrink_slab+0x28b/0x550 mm/vmscan.c:511
 shrink_slab+0xea/0x1c0 mm/vmscan.c:672
 shrink_node_memcgs+0x27a/0x410 mm/vmscan.c:2665
 shrink_node+0x9fa/0x1210 mm/vmscan.c:2780
 shrink_zones+0x29f/0x470 mm/vmscan.c:2983
 do_try_to_free_pages+0x193/0x6f0 mm/vmscan.c:3038
 try_to_free_pages+0x399/0x870 mm/vmscan.c:3277
 __perform_reclaim mm/page_alloc.c:4377 [inline]
 __alloc_pages_direct_reclaim mm/page_alloc.c:4398 [inline]
 __alloc_pages_slowpath+0x52f/0x9c0 mm/page_alloc.c:4802
 __alloc_pages_nodemask+0x269/0x350 mm/page_alloc.c:5012
 alloc_pages_current+0x21d/0x310 mm/mempolicy.c:2267
 alloc_pages include/linux/gfp.h:547 [inline]
 __vmalloc_area_node mm/vmalloc.c:2510 [inline]
 __vmalloc_node_range+0x2b0/0x500 mm/vmalloc.c:2576
 vmalloc_user+0x55/0x60 mm/vmalloc.c:2688
 vb2_vmalloc_alloc+0x8f/0x120 drivers/media/common/videobuf2/videobuf2-vmalloc.c:48
 __vb2_buf_mem_alloc drivers/media/common/videobuf2/videobuf2-core.c:233 [inline]
 __vb2_queue_alloc+0x561/0xc00 drivers/media/common/videobuf2/videobuf2-core.c:438
 vb2_core_create_bufs+0x33a/0x5a0 drivers/media/common/videobuf2/videobuf2-core.c:920
 vb2_create_bufs+0x48b/0x5c0 drivers/media/common/videobuf2/videobuf2-v4l2.c:805
 v4l2_m2m_create_bufs drivers/media/v4l2-core/v4l2-mem2mem.c:810 [inline]
 v4l2_m2m_ioctl_create_bufs+0xb4/0xc0 drivers/media/v4l2-core/v4l2-mem2mem.c:1316
 v4l_create_bufs+0x15e/0x1b0 drivers/media/v4l2-core/v4l2-ioctl.c:2094
 __video_do_ioctl+0x660/0x840 drivers/media/v4l2-core/v4l2-ioctl.c:2993
 video_usercopy+0x94f/0x1320 drivers/media/v4l2-core/v4l2-ioctl.c:3345
 video_ioctl2+0x25/0x30 drivers/media/v4l2-core/v4l2-ioctl.c:3391
 v4l2_ioctl+0xc2/0xd0 drivers/media/v4l2-core/v4l2-dev.c:360
 vfs_ioctl fs/ioctl.c:48 [inline]
 __do_sys_ioctl fs/ioctl.c:753 [inline]
 __se_sys_ioctl+0xcb/0x140 fs/ioctl.c:739
 __x64_sys_ioctl+0x3f/0x50 fs/ioctl.c:739
 do_syscall_64+0x39/0x80 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 5334 Comm: syz-executor.2 Not tainted 5.11.0-rc4-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
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