================================================================== BUG: KCSAN: data-race in dec_zone_page_state / release_pages write to 0xffffea000485fc80 of 8 bytes by task 22119 on cpu 1: 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:337 [inline] release_pages+0x41c/0x8b0 mm/swap.c:940 __pagevec_release+0xa7/0xd0 mm/swap.c:972 pagevec_release include/linux/pagevec.h:88 [inline] __invalidate_mapping_pages+0x6c6/0x720 mm/truncate.c:610 invalidate_mapping_pagevec+0x29/0x40 mm/truncate.c:647 generic_fadvise+0x432/0x480 mm/fadvise.c:157 vfs_fadvise mm/fadvise.c:186 [inline] ksys_fadvise64_64 mm/fadvise.c:200 [inline] __do_sys_fadvise64 mm/fadvise.c:215 [inline] __se_sys_fadvise64 mm/fadvise.c:213 [inline] __x64_sys_fadvise64+0xc5/0x100 mm/fadvise.c:213 do_syscall_64+0x39/0x80 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 read to 0xffffea000485fc80 of 8 bytes by task 292 on cpu 0: page_to_nid include/linux/mm.h:1302 [inline] page_zone include/linux/mm.h:1444 [inline] dec_zone_page_state+0x13/0x100 mm/vmstat.c:542 test_clear_page_writeback+0x3ba/0x450 mm/page-writeback.c:2765 end_page_writeback+0xa7/0x110 mm/filemap.c:1487 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+0x3e1/0x950 kernel/workqueue.c:2272 worker_thread+0x635/0xb90 kernel/workqueue.c:2418 kthread+0x1fa/0x220 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296 Reported by Kernel Concurrency Sanitizer on: CPU: 0 PID: 292 Comm: kworker/u4:3 Not tainted 5.10.0-rc3-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 ==================================================================