================================================================== BUG: KCSAN: data-race in __filemap_fdatawrite_range / xas_clear_mark write to 0xffff88810774dcc4 of 4 bytes by task 17349 on cpu 0: xa_mark_clear lib/xarray.c:75 [inline] xas_clear_mark+0x16c/0x180 lib/xarray.c:921 __test_set_page_writeback+0x3db/0x4f0 mm/page-writeback.c:2802 ext4_bio_write_page+0xfe/0xe60 fs/ext4/page-io.c:450 mpage_submit_page fs/ext4/inode.c:2102 [inline] mpage_process_page_bufs+0x4db/0x5f0 fs/ext4/inode.c:2216 mpage_prepare_extent_to_map+0x4e6/0x640 fs/ext4/inode.c:2628 ext4_writepages+0x674/0x1e70 fs/ext4/inode.c:2756 do_writepages+0x7b/0x150 mm/page-writeback.c:2352 __filemap_fdatawrite_range+0x19d/0x1d0 mm/filemap.c:424 file_write_and_wait_range+0x9f/0x120 mm/filemap.c:763 ext4_sync_file+0x105/0x6e0 fs/ext4/fsync.c:151 vfs_fsync_range+0x107/0x120 fs/sync.c:200 generic_write_sync include/linux/fs.h:2843 [inline] ext4_buffered_write_iter+0x38f/0x3e0 fs/ext4/file.c:277 ext4_file_write_iter+0x48a/0x10b0 fs/ext4/file.c:502 call_write_iter include/linux/fs.h:1977 [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+0x7a6/0xe20 fs/read_write.c:1260 __do_sys_sendfile64 fs/read_write.c:1319 [inline] __se_sys_sendfile64 fs/read_write.c:1311 [inline] __x64_sys_sendfile64+0xa9/0x130 fs/read_write.c:1311 do_syscall_64+0x39/0x80 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xae read to 0xffff88810774dcc4 of 4 bytes by task 17342 on cpu 1: xa_marked include/linux/xarray.h:416 [inline] mapping_tagged include/linux/fs.h:490 [inline] __filemap_fdatawrite_range+0x11c/0x1d0 mm/filemap.c:420 filemap_write_and_wait_range+0x8b/0x2a0 mm/filemap.c:657 __iomap_dio_rw+0x40a/0xa30 fs/iomap/direct-io.c:525 iomap_dio_rw+0x30/0x70 fs/iomap/direct-io.c:641 ext4_dio_write_iter fs/ext4/file.c:551 [inline] ext4_file_write_iter+0xe5d/0x10b0 fs/ext4/file.c:661 call_write_iter include/linux/fs.h:1977 [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+0x7a6/0xe20 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+0x39/0x80 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xae Reported by Kernel Concurrency Sanitizer on: CPU: 1 PID: 17342 Comm: syz-executor.3 Not tainted 5.12.0-rc2-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================