================================================================== BUG: KCSAN: data-race in dec_zone_page_state / release_pages write to 0xffffea00042ae3c0 of 8 bytes by task 15165 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:331 [inline] release_pages+0x402/0x8f0 mm/swap.c:942 __pagevec_release+0x96/0xc0 mm/swap.c:976 pagevec_release include/linux/pagevec.h:88 [inline] invalidate_mapping_pages+0x6c6/0x720 mm/truncate.c:620 __generic_file_write_iter+0x2e1/0x330 mm/filemap.c:3624 generic_file_write_iter+0x2f3/0x3e0 mm/filemap.c:3666 call_write_iter include/linux/fs.h:1874 [inline] do_iter_readv_writev+0x32e/0x3d0 fs/read_write.c:721 do_iter_write+0x112/0x4b0 fs/read_write.c:847 vfs_iter_write+0x4c/0x70 fs/read_write.c:888 iter_file_splice_write+0x41a/0x770 fs/splice.c:769 do_splice_from fs/splice.c:865 [inline] direct_splice_actor+0x95/0x160 fs/splice.c:1035 splice_direct_to_actor+0x365/0x660 fs/splice.c:990 do_splice_direct+0xf2/0x170 fs/splice.c:1078 do_sendfile+0x56a/0xba0 fs/read_write.c:1238 __do_sys_sendfile64 fs/read_write.c:1299 [inline] __se_sys_sendfile64 fs/read_write.c:1285 [inline] __x64_sys_sendfile64+0xf2/0x130 fs/read_write.c:1285 do_syscall_64+0x39/0x80 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 read to 0xffffea00042ae3c0 of 8 bytes by interrupt on cpu 1: page_to_nid include/linux/mm.h:1302 [inline] page_zone include/linux/mm.h:1444 [inline] dec_zone_page_state+0x13/0x110 mm/vmstat.c:542 test_clear_page_writeback+0x3fb/0x480 mm/page-writeback.c:2765 end_page_writeback+0xa7/0x110 mm/filemap.c:1467 page_endio+0x1be/0x200 mm/filemap.c:1498 mpage_end_io+0x186/0x1d0 fs/mpage.c:54 bio_endio+0x28a/0x350 block/bio.c:1449 req_bio_endio block/blk-core.c:259 [inline] blk_update_request+0x535/0xbb0 block/blk-core.c:1577 blk_mq_end_request+0x22/0x50 block/blk-mq.c:562 lo_complete_rq+0xca/0x180 drivers/block/loop.c:500 blk_done_softirq+0x1a5/0x200 block/blk-mq.c:586 __do_softirq+0x198/0x331 kernel/softirq.c:298 run_ksoftirqd+0x2f/0x60 kernel/softirq.c:653 smpboot_thread_fn+0x347/0x530 kernel/smpboot.c:165 kthread+0x20d/0x230 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294 Reported by Kernel Concurrency Sanitizer on: CPU: 1 PID: 16 Comm: ksoftirqd/1 Not tainted 5.9.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================