================================================================== BUG: KCSAN: data-race in __filemap_fdatawrite_range / xas_clear_mark write to 0xffff8880b77f56ac of 4 bytes by task 18028 on cpu 1: xa_mark_clear lib/xarray.c:75 [inline] xas_clear_mark+0x15a/0x170 lib/xarray.c:918 __test_set_page_writeback+0x3ae/0x480 mm/page-writeback.c:2808 ext4_bio_write_page+0xed/0xda0 fs/ext4/page-io.c:453 mpage_submit_page fs/ext4/inode.c:2082 [inline] mpage_map_and_submit_buffers fs/ext4/inode.c:2330 [inline] mpage_map_and_submit_extent fs/ext4/inode.c:2469 [inline] ext4_writepages+0xeb9/0x1ef0 fs/ext4/inode.c:2782 do_writepages+0x7b/0x150 mm/page-writeback.c:2352 __filemap_fdatawrite_range+0x19b/0x1d0 mm/filemap.c:422 filemap_write_and_wait_range+0x8b/0x2a0 mm/filemap.c:655 iomap_dio_rw+0x371/0x980 fs/iomap/direct-io.c:478 ext4_dio_read_iter fs/ext4/file.c:77 [inline] ext4_file_read_iter+0x3be/0x420 fs/ext4/file.c:129 call_read_iter include/linux/fs.h:1876 [inline] generic_file_splice_read+0x22b/0x310 fs/splice.c:312 do_splice_to fs/splice.c:870 [inline] splice_direct_to_actor+0x2a8/0x660 fs/splice.c:950 do_splice_direct+0xf2/0x170 fs/splice.c:1059 do_sendfile+0x56a/0xba0 fs/read_write.c:1540 __do_sys_sendfile64 fs/read_write.c:1601 [inline] __se_sys_sendfile64 fs/read_write.c:1587 [inline] __x64_sys_sendfile64+0xf2/0x130 fs/read_write.c:1587 do_syscall_64+0x39/0x80 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 read to 0xffff8880b77f56ac of 4 bytes by task 18036 on cpu 0: xa_marked include/linux/xarray.h:416 [inline] mapping_tagged include/linux/fs.h:493 [inline] __filemap_fdatawrite_range+0x113/0x1d0 mm/filemap.c:418 filemap_write_and_wait_range+0x8b/0x2a0 mm/filemap.c:655 iomap_dio_rw+0x371/0x980 fs/iomap/direct-io.c:478 ext4_dio_read_iter fs/ext4/file.c:77 [inline] ext4_file_read_iter+0x3be/0x420 fs/ext4/file.c:129 call_read_iter include/linux/fs.h:1876 [inline] generic_file_splice_read+0x22b/0x310 fs/splice.c:312 do_splice_to fs/splice.c:870 [inline] splice_direct_to_actor+0x2a8/0x660 fs/splice.c:950 do_splice_direct+0xf2/0x170 fs/splice.c:1059 do_sendfile+0x56a/0xba0 fs/read_write.c:1540 __do_sys_sendfile64 fs/read_write.c:1601 [inline] __se_sys_sendfile64 fs/read_write.c:1587 [inline] __x64_sys_sendfile64+0xf2/0x130 fs/read_write.c:1587 do_syscall_64+0x39/0x80 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 Reported by Kernel Concurrency Sanitizer on: CPU: 0 PID: 18036 Comm: syz-executor.2 Not tainted 5.9.0-rc1-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================