================================================================== BUG: KCSAN: data-race in compact_zone / compact_zone write to 0xffff88813fffc290 of 8 bytes by task 32612 on cpu 1: update_cached_migrate mm/compaction.c:435 [inline] isolate_migratepages mm/compaction.c:1887 [inline] compact_zone+0x1415/0x1d60 mm/compaction.c:2334 compact_zone_order mm/compaction.c:2477 [inline] try_to_compact_pages+0x317/0x820 mm/compaction.c:2535 __alloc_pages_direct_compact+0x89/0x350 mm/page_alloc.c:4149 __alloc_pages_slowpath+0x2b5/0x9c0 mm/page_alloc.c:4728 __alloc_pages_nodemask+0x269/0x350 mm/page_alloc.c:5014 alloc_pages_current+0x21d/0x310 mm/mempolicy.c:2267 alloc_pages include/linux/gfp.h:547 [inline] __get_free_pages+0x8/0x30 mm/page_alloc.c:5038 io_mem_alloc fs/io_uring.c:8322 [inline] io_allocate_scq_urings fs/io_uring.c:9533 [inline] io_uring_create+0xf05/0x2170 fs/io_uring.c:9724 io_uring_setup fs/io_uring.c:9813 [inline] __do_sys_io_uring_setup fs/io_uring.c:9819 [inline] __se_sys_io_uring_setup fs/io_uring.c:9816 [inline] __x64_sys_io_uring_setup+0xe1/0x120 fs/io_uring.c:9816 do_syscall_64+0x39/0x80 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 read to 0xffff88813fffc290 of 8 bytes by task 32611 on cpu 0: update_cached_migrate mm/compaction.c:434 [inline] isolate_migratepages mm/compaction.c:1887 [inline] compact_zone+0x13f0/0x1d60 mm/compaction.c:2334 compact_zone_order mm/compaction.c:2477 [inline] try_to_compact_pages+0x317/0x820 mm/compaction.c:2535 __alloc_pages_direct_compact+0x89/0x350 mm/page_alloc.c:4149 __alloc_pages_slowpath+0x2b5/0x9c0 mm/page_alloc.c:4728 __alloc_pages_nodemask+0x269/0x350 mm/page_alloc.c:5014 alloc_pages_current+0x21d/0x310 mm/mempolicy.c:2267 alloc_pages include/linux/gfp.h:547 [inline] __get_free_pages+0x8/0x30 mm/page_alloc.c:5038 io_mem_alloc fs/io_uring.c:8322 [inline] io_allocate_scq_urings fs/io_uring.c:9553 [inline] io_uring_create+0x1065/0x2170 fs/io_uring.c:9724 io_uring_setup fs/io_uring.c:9813 [inline] __do_sys_io_uring_setup fs/io_uring.c:9819 [inline] __se_sys_io_uring_setup fs/io_uring.c:9816 [inline] __x64_sys_io_uring_setup+0xe1/0x120 fs/io_uring.c:9816 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: 0 PID: 32611 Comm: syz-executor.5 Not tainted 5.11.0-rc6-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================