loop3: detected capacity change from 0 to 264192 ================================================================== BUG: KCSAN: data-race in __xa_clear_mark / xas_find_marked write to 0xffff888106b17470 of 8 bytes by interrupt on cpu 1: instrument_write include/linux/instrumented.h:42 [inline] __instrument_read_write_bitop include/asm-generic/bitops/instrumented-non-atomic.h:79 [inline] __test_and_clear_bit include/asm-generic/bitops/instrumented-non-atomic.h:109 [inline] node_clear_mark lib/xarray.c:100 [inline] xas_clear_mark lib/xarray.c:911 [inline] __xa_clear_mark+0x1d9/0x2c0 lib/xarray.c:1917 test_clear_page_writeback+0x23e/0x560 mm/page-writeback.c:2736 end_page_writeback+0xd7/0x1b0 mm/filemap.c:1548 end_buffer_async_write+0x1b0/0x250 fs/buffer.c:375 end_bio_bh_io_sync+0x6f/0x90 fs/buffer.c:3026 bio_endio+0x21d/0x300 block/bio.c:1414 req_bio_endio block/blk-core.c:265 [inline] blk_update_request+0x435/0xa30 block/blk-core.c:1454 blk_mq_end_request+0x22/0x50 block/blk-mq.c:565 lo_complete_rq+0xca/0x170 drivers/block/loop.c:498 blk_complete_reqs block/blk-mq.c:577 [inline] blk_done_softirq+0x69/0x90 block/blk-mq.c:582 __do_softirq+0x12c/0x275 kernel/softirq.c:559 run_ksoftirqd+0x13/0x20 kernel/softirq.c:921 smpboot_thread_fn+0x2a1/0x3f0 kernel/smpboot.c:165 kthread+0x1d0/0x1f0 kernel/kthread.c:313 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294 read to 0xffff888106b17470 of 8 bytes by task 6254 on cpu 0: xas_find_chunk include/linux/xarray.h:1662 [inline] xas_find_marked+0x195/0x5f0 lib/xarray.c:1349 find_get_entry mm/filemap.c:1925 [inline] find_get_pages_range_tag+0xf2/0x390 mm/filemap.c:2216 pagevec_lookup_range_tag+0x37/0x50 mm/swap.c:1123 __filemap_fdatawait_range+0xab/0x1b0 mm/filemap.c:510 file_write_and_wait_range+0x1c3/0x210 mm/filemap.c:796 __generic_file_fsync+0x48/0x140 fs/libfs.c:1079 fat_file_fsync+0x48/0x100 fs/fat/file.c:190 vfs_fsync_range+0x107/0x120 fs/sync.c:200 generic_write_sync include/linux/fs.h:2982 [inline] generic_file_write_iter+0x103/0x130 mm/filemap.c:3825 call_write_iter include/linux/fs.h:2114 [inline] do_iter_readv_writev+0x2cb/0x360 fs/read_write.c:740 do_iter_write+0x112/0x4c0 fs/read_write.c:866 vfs_iter_write+0x4c/0x70 fs/read_write.c:907 iter_file_splice_write+0x40a/0x750 fs/splice.c:689 do_splice_from fs/splice.c:767 [inline] direct_splice_actor+0x80/0xa0 fs/splice.c:936 splice_direct_to_actor+0x345/0x650 fs/splice.c:891 do_splice_direct+0xf5/0x170 fs/splice.c:979 do_sendfile+0x773/0xda0 fs/read_write.c:1260 __do_sys_sendfile64 fs/read_write.c:1325 [inline] __se_sys_sendfile64 fs/read_write.c:1311 [inline] __x64_sys_sendfile64+0xf2/0x130 fs/read_write.c:1311 do_syscall_64+0x4a/0x90 arch/x86/entry/common.c:47 entry_SYSCALL_64_after_hwframe+0x44/0xae Reported by Kernel Concurrency Sanitizer on: CPU: 0 PID: 6254 Comm: syz-executor.3 Not tainted 5.13.0-rc2-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================