================================================================== BUG: KCSAN: data-race in find_get_pages_range_tag / xas_clear_mark write to 0xffff888128d46fb0 of 8 bytes by interrupt on cpu 1: __test_and_clear_bit include/asm-generic/bitops/instrumented-non-atomic.h:91 [inline] node_clear_mark lib/xarray.c:99 [inline] xas_clear_mark+0xe6/0x180 lib/xarray.c:907 __xa_clear_mark+0xd3/0x100 lib/xarray.c:1717 test_clear_page_writeback+0x44c/0x790 mm/page-writeback.c:2731 end_page_writeback+0x9e/0x190 mm/filemap.c:1339 ext4_finish_bio+0x40d/0x520 fs/ext4/page-io.c:148 ext4_end_bio+0xd2/0x2f0 fs/ext4/page-io.c:370 bio_endio+0x2fa/0x400 block/bio.c:1821 req_bio_endio block/blk-core.c:245 [inline] blk_update_request+0x427/0x7b0 block/blk-core.c:1464 scsi_end_request+0x6b/0x360 drivers/scsi/scsi_lib.c:576 scsi_io_completion+0x11d/0xc80 drivers/scsi/scsi_lib.c:960 scsi_finish_command+0x283/0x380 drivers/scsi/scsi.c:228 scsi_softirq_done+0x259/0x280 drivers/scsi/scsi_lib.c:1476 blk_done_softirq+0x1eb/0x250 block/blk-softirq.c:37 __do_softirq+0x115/0x33f kernel/softirq.c:292 invoke_softirq kernel/softirq.c:373 [inline] irq_exit+0xbb/0xe0 kernel/softirq.c:413 exiting_irq arch/x86/include/asm/apic.h:536 [inline] do_IRQ+0x81/0x130 arch/x86/kernel/irq.c:263 ret_from_intr+0x0/0x21 arch_local_irq_restore arch/x86/include/asm/paravirt.h:752 [inline] kcsan_setup_watchpoint+0x1d4/0x460 kernel/kcsan/core.c:429 check_access kernel/kcsan/core.c:459 [inline] __tsan_read8+0xc6/0x100 kernel/kcsan/core.c:589 compound_head include/linux/page-flags.h:174 [inline] PageAnon include/linux/page-flags.h:463 [inline] page_remove_rmap+0x56/0x7a0 mm/rmap.c:1329 zap_pte_range mm/memory.c:1080 [inline] zap_pmd_range mm/memory.c:1184 [inline] zap_pud_range mm/memory.c:1213 [inline] zap_p4d_range mm/memory.c:1234 [inline] unmap_page_range+0xb31/0x1940 mm/memory.c:1255 unmap_single_vma+0x144/0x200 mm/memory.c:1300 unmap_vmas+0xda/0x1a0 mm/memory.c:1332 exit_mmap+0x13e/0x300 mm/mmap.c:3140 __mmput kernel/fork.c:1082 [inline] mmput+0xea/0x280 kernel/fork.c:1103 exit_mm kernel/exit.c:485 [inline] do_exit+0x4ac/0x18c0 kernel/exit.c:784 do_group_exit+0xb4/0x1c0 kernel/exit.c:895 __do_sys_exit_group kernel/exit.c:906 [inline] __se_sys_exit_group kernel/exit.c:904 [inline] __x64_sys_exit_group+0x2e/0x30 kernel/exit.c:904 do_syscall_64+0xcc/0x3a0 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x44/0xa9 read to 0xffff888128d46fb0 of 8 bytes by task 8284 on cpu 0: xas_find_chunk include/linux/xarray.h:1590 [inline] xas_next_marked include/linux/xarray.h:1620 [inline] find_get_pages_range_tag+0x1c2/0x670 mm/filemap.c:1925 pagevec_lookup_range_tag+0x45/0x70 mm/swap.c:1073 __filemap_fdatawait_range+0xdc/0x1d0 mm/filemap.c:518 filemap_fdatawait_range mm/filemap.c:553 [inline] filemap_write_and_wait_range mm/filemap.c:685 [inline] filemap_write_and_wait_range+0xd9/0x150 mm/filemap.c:675 iomap_dio_rw+0x3a2/0x9a0 fs/iomap/direct-io.c:471 ext4_dio_read_iter fs/ext4/file.c:77 [inline] ext4_file_read_iter fs/ext4/file.c:128 [inline] ext4_file_read_iter+0x2e4/0x380 fs/ext4/file.c:113 call_read_iter include/linux/fs.h:1896 [inline] generic_file_splice_read+0x35c/0x500 fs/splice.c:313 do_splice_to+0xf2/0x130 fs/splice.c:892 splice_direct_to_actor+0x1b6/0x540 fs/splice.c:971 do_splice_direct+0x161/0x1e0 fs/splice.c:1080 do_sendfile+0x384/0x7f0 fs/read_write.c:1464 __do_sys_sendfile64 fs/read_write.c:1519 [inline] __se_sys_sendfile64 fs/read_write.c:1511 [inline] __x64_sys_sendfile64+0xbe/0x140 fs/read_write.c:1511 do_syscall_64+0xcc/0x3a0 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x44/0xa9 Reported by Kernel Concurrency Sanitizer on: CPU: 0 PID: 8284 Comm: syz-executor.5 Not tainted 5.5.0-rc1-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================