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BUG: KCSAN: data-race in compact_zone / compact_zone

write to 0xffff88823fffad90 of 8 bytes by task 6291 on cpu 0:
 update_cached_migrate mm/compaction.c:473 [inline]
 isolate_migratepages mm/compaction.c:2047 [inline]
 compact_zone+0x1100/0x2720 mm/compaction.c:2508
 compact_zone_order mm/compaction.c:2668 [inline]
 try_to_compact_pages+0x39b/0x930 mm/compaction.c:2729
 __alloc_pages_direct_compact+0x75/0x1f0 mm/page_alloc.c:3525
 __alloc_pages_slowpath+0x232/0xd90 mm/page_alloc.c:4119
 __alloc_pages+0x25d/0x340 mm/page_alloc.c:4581
 alloc_pages_mpol+0xb1/0x1d0 mm/mempolicy.c:2133
 alloc_pages+0xe0/0x100 mm/mempolicy.c:2204
 __get_free_pages+0xc/0x30 mm/page_alloc.c:4615
 io_mem_alloc io_uring/io_uring.c:2783 [inline]
 io_allocate_scq_urings+0x119/0x360 io_uring/io_uring.c:3813
 io_uring_create+0x537/0x920 io_uring/io_uring.c:4015
 io_uring_setup io_uring/io_uring.c:4127 [inline]
 __do_sys_io_uring_setup io_uring/io_uring.c:4154 [inline]
 __se_sys_io_uring_setup+0x1ce/0x1e0 io_uring/io_uring.c:4148
 __x64_sys_io_uring_setup+0x31/0x40 io_uring/io_uring.c:4148
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x44/0x110 arch/x86/entry/common.c:82
 entry_SYSCALL_64_after_hwframe+0x63/0x6b

read to 0xffff88823fffad90 of 8 bytes by task 6292 on cpu 1:
 update_cached_migrate mm/compaction.c:472 [inline]
 isolate_migratepages mm/compaction.c:2047 [inline]
 compact_zone+0x10db/0x2720 mm/compaction.c:2508
 compact_zone_order mm/compaction.c:2668 [inline]
 try_to_compact_pages+0x39b/0x930 mm/compaction.c:2729
 __alloc_pages_direct_compact+0x75/0x1f0 mm/page_alloc.c:3525
 __alloc_pages_slowpath+0x578/0xd90 mm/page_alloc.c:4202
 __alloc_pages+0x25d/0x340 mm/page_alloc.c:4581
 __alloc_pages_node include/linux/gfp.h:238 [inline]
 alloc_pages_node include/linux/gfp.h:261 [inline]
 __kmalloc_large_node+0x80/0x120 mm/slab_common.c:1148
 __do_kmalloc_node mm/slab_common.c:995 [inline]
 __kmalloc_node+0xcc/0x1a0 mm/slab_common.c:1014
 kmalloc_node include/linux/slab.h:620 [inline]
 kvmalloc_node+0x72/0x160 mm/util.c:617
 kvmalloc include/linux/slab.h:738 [inline]
 kvmalloc_array include/linux/slab.h:756 [inline]
 kvcalloc include/linux/slab.h:761 [inline]
 cake_init+0x20e/0x5b0 net/sched/sch_cake.c:2738
 qdisc_create+0x6b7/0xac0 net/sched/sch_api.c:1326
 tc_modify_qdisc+0x653/0x1040 net/sched/sch_api.c:1747
 rtnetlink_rcv_msg+0x807/0x8c0 net/core/rtnetlink.c:6558
 netlink_rcv_skb+0x126/0x220 net/netlink/af_netlink.c:2545
 rtnetlink_rcv+0x1c/0x20 net/core/rtnetlink.c:6576
 netlink_unicast_kernel net/netlink/af_netlink.c:1342 [inline]
 netlink_unicast+0x589/0x650 net/netlink/af_netlink.c:1368
 netlink_sendmsg+0x66e/0x770 net/netlink/af_netlink.c:1910
 sock_sendmsg_nosec net/socket.c:730 [inline]
 __sock_sendmsg net/socket.c:745 [inline]
 ____sys_sendmsg+0x37c/0x4d0 net/socket.c:2584
 ___sys_sendmsg net/socket.c:2638 [inline]
 __sys_sendmsg+0x1e9/0x270 net/socket.c:2667
 __do_sys_sendmsg net/socket.c:2676 [inline]
 __se_sys_sendmsg net/socket.c:2674 [inline]
 __x64_sys_sendmsg+0x46/0x50 net/socket.c:2674
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x44/0x110 arch/x86/entry/common.c:82
 entry_SYSCALL_64_after_hwframe+0x63/0x6b

value changed: 0x0000000000121200 -> 0x0000000000122600

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 6292 Comm: syz-executor.3 Not tainted 6.7.0-rc3-syzkaller-00033-g3b47bc037bd4 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/10/2023
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