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BUG: KCSAN: data-race in compact_zone / compact_zone

write to 0xffff88823fffad90 of 8 bytes by task 11673 on cpu 0:
 update_cached_migrate mm/compaction.c:432 [inline]
 isolate_migratepages mm/compaction.c:1919 [inline]
 compact_zone+0x1449/0x1ce0 mm/compaction.c:2370
 compact_zone_order mm/compaction.c:2513 [inline]
 try_to_compact_pages+0x317/0x840 mm/compaction.c:2579
 __alloc_pages_direct_compact+0x61/0x330 mm/page_alloc.c:4357
 __alloc_pages_slowpath+0x5e4/0xbf0 mm/page_alloc.c:5023
 __alloc_pages+0x25b/0x320 mm/page_alloc.c:5388
 alloc_pages+0x382/0x3d0
 __get_free_pages+0x8/0x30 mm/page_alloc.c:5412
 io_mem_alloc fs/io_uring.c:8762 [inline]
 io_allocate_scq_urings fs/io_uring.c:10173 [inline]
 io_uring_create+0xa42/0x1bb0 fs/io_uring.c:10291
 io_uring_setup fs/io_uring.c:10381 [inline]
 __do_sys_io_uring_setup fs/io_uring.c:10387 [inline]
 __se_sys_io_uring_setup fs/io_uring.c:10384 [inline]
 __x64_sys_io_uring_setup+0xf3/0x130 fs/io_uring.c:10384
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x44/0xa0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae

read to 0xffff88823fffad90 of 8 bytes by task 11684 on cpu 1:
 update_cached_migrate mm/compaction.c:431 [inline]
 isolate_migratepages mm/compaction.c:1919 [inline]
 compact_zone+0x1425/0x1ce0 mm/compaction.c:2370
 compact_zone_order mm/compaction.c:2513 [inline]
 try_to_compact_pages+0x317/0x840 mm/compaction.c:2579
 __alloc_pages_direct_compact+0x61/0x330 mm/page_alloc.c:4357
 __alloc_pages_slowpath+0x2aa/0xbf0 mm/page_alloc.c:4941
 __alloc_pages+0x25b/0x320 mm/page_alloc.c:5388
 alloc_pages+0x382/0x3d0
 __get_free_pages+0x8/0x30 mm/page_alloc.c:5412
 io_mem_alloc fs/io_uring.c:8762 [inline]
 io_allocate_scq_urings fs/io_uring.c:10155 [inline]
 io_uring_create+0x949/0x1bb0 fs/io_uring.c:10291
 io_uring_setup fs/io_uring.c:10381 [inline]
 __do_sys_io_uring_setup fs/io_uring.c:10387 [inline]
 __se_sys_io_uring_setup fs/io_uring.c:10384 [inline]
 __x64_sys_io_uring_setup+0xf3/0x130 fs/io_uring.c:10384
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x44/0xa0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae

value changed: 0x0000000000219600 -> 0x000000000022ac00

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 11684 Comm: syz-executor.0 Not tainted 5.15.0-rc5-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
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