==================================================================
BUG: KCSAN: data-race in compact_zone / compact_zone

write to 0xffff88813fffc290 of 8 bytes by task 13168 on cpu 0:
 update_cached_migrate mm/compaction.c:434 [inline]
 isolate_migratepages mm/compaction.c:1887 [inline]
 compact_zone+0x14b5/0x1e60 mm/compaction.c:2342
 compact_zone_order mm/compaction.c:2485 [inline]
 try_to_compact_pages+0x317/0x820 mm/compaction.c:2543
 __alloc_pages_direct_compact+0x89/0x350 mm/page_alloc.c:4155
 __alloc_pages_slowpath+0x5cb/0x9e0 mm/page_alloc.c:4816
 __alloc_pages_nodemask+0x26a/0x350 mm/page_alloc.c:5020
 alloc_pages_current+0x21d/0x310 mm/mempolicy.c:2277
 alloc_pages include/linux/gfp.h:561 [inline]
 __get_free_pages+0x8/0x30 mm/page_alloc.c:5044
 io_mem_alloc fs/io_uring.c:8045 [inline]
 io_allocate_scq_urings fs/io_uring.c:9392 [inline]
 io_uring_create+0x8b6/0x1850 fs/io_uring.c:9530
 io_uring_setup fs/io_uring.c:9614 [inline]
 __do_sys_io_uring_setup fs/io_uring.c:9620 [inline]
 __se_sys_io_uring_setup fs/io_uring.c:9617 [inline]
 __x64_sys_io_uring_setup+0xe1/0x120 fs/io_uring.c:9617
 do_syscall_64+0x39/0x80 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xae

read to 0xffff88813fffc290 of 8 bytes by task 13173 on cpu 1:
 update_cached_migrate mm/compaction.c:433 [inline]
 isolate_migratepages mm/compaction.c:1887 [inline]
 compact_zone+0x1491/0x1e60 mm/compaction.c:2342
 compact_zone_order mm/compaction.c:2485 [inline]
 try_to_compact_pages+0x317/0x820 mm/compaction.c:2543
 __alloc_pages_direct_compact+0x89/0x350 mm/page_alloc.c:4155
 __alloc_pages_slowpath+0x2b5/0x9e0 mm/page_alloc.c:4734
 __alloc_pages_nodemask+0x26a/0x350 mm/page_alloc.c:5020
 alloc_pages_current+0x21d/0x310 mm/mempolicy.c:2277
 alloc_pages include/linux/gfp.h:561 [inline]
 __get_free_pages+0x8/0x30 mm/page_alloc.c:5044
 io_mem_alloc fs/io_uring.c:8045 [inline]
 io_allocate_scq_urings fs/io_uring.c:9392 [inline]
 io_uring_create+0x8b6/0x1850 fs/io_uring.c:9530
 io_uring_setup fs/io_uring.c:9614 [inline]
 __do_sys_io_uring_setup fs/io_uring.c:9620 [inline]
 __se_sys_io_uring_setup fs/io_uring.c:9617 [inline]
 __x64_sys_io_uring_setup+0xe1/0x120 fs/io_uring.c:9617
 do_syscall_64+0x39/0x80 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xae

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 13173 Comm: syz-executor.5 Not tainted 5.12.0-rc6-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
==================================================================