================================================================== BUG: KCSAN: data-race in __lru_cache_add / lru_add_drain_all write to 0xffff88812c029c40 of 1 bytes by task 14251 on cpu 0: pagevec_add include/linux/pagevec.h:81 [inline] __lru_cache_add+0xb8/0x1c0 mm/swap.c:410 lru_cache_add_anon+0x98/0x120 mm/swap.c:423 shmem_getpage_gfp+0x4d4/0x16c0 mm/shmem.c:1880 shmem_fault+0x117/0x4b0 mm/shmem.c:2062 __do_fault+0xa8/0x1e0 mm/memory.c:3450 do_read_fault mm/memory.c:3846 [inline] do_fault mm/memory.c:3975 [inline] handle_pte_fault mm/memory.c:4215 [inline] __handle_mm_fault+0x295c/0x2da0 mm/memory.c:4345 handle_mm_fault+0x21c/0x540 mm/memory.c:4382 faultin_page mm/gup.c:879 [inline] __get_user_pages+0x533/0x11c0 mm/gup.c:1098 populate_vma_page_range+0xdc/0x100 mm/gup.c:1430 __mm_populate+0x168/0x2b0 mm/gup.c:1478 mm_populate include/linux/mm.h:2562 [inline] __do_sys_remap_file_pages mm/mmap.c:2979 [inline] __se_sys_remap_file_pages mm/mmap.c:2889 [inline] __x64_sys_remap_file_pages+0x56f/0x580 mm/mmap.c:2889 do_syscall_64+0xc7/0x3b0 arch/x86/entry/common.c:295 entry_SYSCALL_64_after_hwframe+0x44/0xa9 read to 0xffff88812c029c40 of 1 bytes by task 14242 on cpu 1: lru_add_drain_all+0x169/0x3a0 mm/swap.c:746 migrate_prep+0x13/0x20 mm/migrate.c:73 do_mbind+0x2e8/0x9f0 mm/mempolicy.c:1339 kernel_mbind+0x10e/0x130 mm/mempolicy.c:1495 __do_sys_mbind mm/mempolicy.c:1502 [inline] __se_sys_mbind mm/mempolicy.c:1498 [inline] __x64_sys_mbind+0x7e/0xa0 mm/mempolicy.c:1498 do_syscall_64+0xc7/0x3b0 arch/x86/entry/common.c:295 entry_SYSCALL_64_after_hwframe+0x44/0xa9 Reported by Kernel Concurrency Sanitizer on: CPU: 1 PID: 14242 Comm: syz-executor.0 Not tainted 5.7.0-rc1-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================