================================================================== BUG: KCSAN: data-race in dec_zone_page_state / release_pages write to 0xffffea000481bf40 of 8 bytes by task 12791 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+0x3cb/0xa60 mm/swap.c:849 __pagevec_release+0x4d/0x80 mm/swap.c:883 pagevec_release include/linux/pagevec.h:88 [inline] invalidate_mapping_pages+0x676/0x860 mm/truncate.c:620 generic_fadvise+0x322/0x490 mm/fadvise.c:170 vfs_fadvise+0x8a/0x90 mm/fadvise.c:187 ksys_fadvise64_64+0x5b/0xa0 mm/fadvise.c:201 __do_sys_fadvise64 mm/fadvise.c:216 [inline] __se_sys_fadvise64 mm/fadvise.c:214 [inline] __x64_sys_fadvise64+0x5a/0x70 mm/fadvise.c:214 do_syscall_64+0xc7/0x3b0 arch/x86/entry/common.c:295 entry_SYSCALL_64_after_hwframe+0x44/0xa9 read to 0xffffea000481bf40 of 8 bytes by task 29 on cpu 1: page_zone include/linux/mm.h:1411 [inline] dec_zone_page_state+0x1d/0xd0 mm/vmstat.c:533 test_clear_page_writeback+0x33f/0x7e0 mm/page-writeback.c:2757 end_page_writeback+0x98/0x180 mm/filemap.c:1317 ext4_finish_bio+0x39b/0x460 fs/ext4/page-io.c:146 ext4_release_io_end+0xc5/0x270 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+0x159/0x400 fs/ext4/page-io.c:274 process_one_work+0x424/0x930 kernel/workqueue.c:2268 worker_thread+0x9a/0x7e0 kernel/workqueue.c:2414 kthread+0x203/0x230 kernel/kthread.c:268 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:352 Reported by Kernel Concurrency Sanitizer on: CPU: 1 PID: 29 Comm: kworker/u4:2 Not tainted 5.7.0-rc1-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 ==================================================================