================================================================== BUG: KCSAN: data-race in dec_zone_page_state / release_pages write to 0xffffea00041dc900 of 8 bytes by task 8845 on cpu 0: instrument_write include/linux/instrumented.h:42 [inline] __clear_bit include/asm-generic/bitops/instrumented-non-atomic.h:42 [inline] __ClearPageLRU include/linux/page-flags.h:328 [inline] release_pages+0x3b3/0x8c0 mm/swap.c:897 __pagevec_release+0x96/0xc0 mm/swap.c:931 pagevec_release include/linux/pagevec.h:88 [inline] truncate_inode_pages_range+0xcf4/0xf10 mm/truncate.c:453 truncate_inode_pages mm/truncate.c:476 [inline] truncate_pagecache+0x4f/0x70 mm/truncate.c:817 ext4_setattr+0xb03/0xec0 fs/ext4/inode.c:5403 notify_change+0x7d4/0xa20 fs/attr.c:336 do_truncate+0xe0/0x120 fs/open.c:64 handle_truncate fs/namei.c:2901 [inline] do_open fs/namei.c:3247 [inline] path_openat+0x1a4c/0x20e0 fs/namei.c:3360 do_filp_open+0xbd/0x1d0 fs/namei.c:3387 do_sys_openat2+0x33c/0x4a0 fs/open.c:1179 do_sys_open fs/open.c:1195 [inline] ksys_open include/linux/syscalls.h:1388 [inline] __do_sys_creat fs/open.c:1263 [inline] __se_sys_creat fs/open.c:1261 [inline] __x64_sys_creat+0x62/0x80 fs/open.c:1261 do_syscall_64+0x51/0xb0 arch/x86/entry/common.c:384 entry_SYSCALL_64_after_hwframe+0x44/0xa9 read to 0xffffea00041dc900 of 8 bytes by task 21 on cpu 1: page_to_nid include/linux/mm.h:1276 [inline] page_zone include/linux/mm.h:1418 [inline] dec_zone_page_state+0x13/0xd0 mm/vmstat.c:533 test_clear_page_writeback+0x3fb/0x480 mm/page-writeback.c:2767 end_page_writeback+0xa7/0x110 mm/filemap.c:1314 ext4_finish_bio+0x429/0x490 fs/ext4/page-io.c:146 ext4_release_io_end+0x98/0x200 fs/ext4/page-io.c:161 ext4_end_io_end fs/ext4/page-io.c:195 [inline] ext4_do_flush_completed_IO fs/ext4/page-io.c:260 [inline] ext4_end_io_rsv_work+0x306/0x360 fs/ext4/page-io.c:274 process_one_work+0x3e1/0x9a0 kernel/workqueue.c:2269 worker_thread+0x665/0xbe0 kernel/workqueue.c:2415 kthread+0x20d/0x230 kernel/kthread.c:291 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:293 Reported by Kernel Concurrency Sanitizer on: CPU: 1 PID: 21 Comm: kworker/u4:1 Not tainted 5.8.0-rc4-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: ext4-rsv-conversion ext4_end_io_rsv_work ==================================================================