================================================================== BUG: KCSAN: data-race in compact_zone / compact_zone write to 0xffff88823fffad90 of 8 bytes by task 18801 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+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:8655 [inline] io_allocate_scq_urings fs/io_uring.c:10052 [inline] io_uring_create+0x944/0x1980 fs/io_uring.c:10188 io_uring_setup fs/io_uring.c:10278 [inline] __do_sys_io_uring_setup fs/io_uring.c:10284 [inline] __se_sys_io_uring_setup fs/io_uring.c:10281 [inline] __x64_sys_io_uring_setup+0xf3/0x130 fs/io_uring.c:10281 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 18799 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:8655 [inline] io_allocate_scq_urings fs/io_uring.c:10052 [inline] io_uring_create+0x944/0x1980 fs/io_uring.c:10188 io_uring_setup fs/io_uring.c:10278 [inline] __do_sys_io_uring_setup fs/io_uring.c:10284 [inline] __se_sys_io_uring_setup fs/io_uring.c:10281 [inline] __x64_sys_io_uring_setup+0xf3/0x130 fs/io_uring.c:10281 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: 0x00000000001a5200 -> 0x00000000001d0000 Reported by Kernel Concurrency Sanitizer on: CPU: 1 PID: 18799 Comm: syz-executor.3 Not tainted 5.15.0-rc1-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================