================================================================== BUG: KCSAN: data-race in find_get_pages_range_tag / xas_init_marks write to 0xffff888133884b38 of 8 bytes by task 11967 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] xas_init_marks+0x1b0/0x340 lib/xarray.c:944 xas_store+0x201/0xcf0 lib/xarray.c:806 page_cache_delete_batch mm/filemap.c:337 [inline] delete_from_page_cache_batch+0x3f4/0x820 mm/filemap.c:358 truncate_inode_pages_range+0x482/0x10e0 mm/truncate.c:366 truncate_inode_pages mm/truncate.c:476 [inline] truncate_pagecache+0x4f/0x70 mm/truncate.c:845 ext4_setattr+0xae3/0xf60 fs/ext4/inode.c:5500 notify_change+0x86d/0xa60 fs/attr.c:336 do_truncate+0xe0/0x120 fs/open.c:64 handle_truncate fs/namei.c:2912 [inline] do_open fs/namei.c:3258 [inline] path_openat+0x1a30/0x20a0 fs/namei.c:3371 do_filp_open+0xbd/0x1d0 fs/namei.c:3398 do_sys_openat2+0xa3/0x250 fs/open.c:1172 do_sys_open fs/open.c:1188 [inline] __do_sys_creat fs/open.c:1262 [inline] __se_sys_creat fs/open.c:1256 [inline] __x64_sys_creat+0x62/0x80 fs/open.c:1256 do_syscall_64+0x39/0x80 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 read to 0xffff888133884b38 of 8 bytes by task 11966 on cpu 0: xas_find_chunk include/linux/xarray.h:1660 [inline] xas_next_marked include/linux/xarray.h:1691 [inline] find_get_pages_range_tag+0x35c/0x600 mm/filemap.c:2103 pagevec_lookup_range_tag+0x37/0x50 mm/swap.c:1122 mpage_prepare_extent_to_map+0x195/0x640 fs/ext4/inode.c:2578 ext4_writepages+0x674/0x1e70 fs/ext4/inode.c:2755 do_writepages+0x7b/0x150 mm/page-writeback.c:2352 __filemap_fdatawrite_range+0x19d/0x1d0 mm/filemap.c:422 file_write_and_wait_range+0x9f/0x120 mm/filemap.c:761 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:2737 [inline] ext4_buffered_write_iter+0x38f/0x3e0 fs/ext4/file.c:278 ext4_file_write_iter+0x47a/0x1060 fs/ext4/file.c:503 call_write_iter include/linux/fs.h:1901 [inline] new_sync_write fs/read_write.c:518 [inline] vfs_write+0x6f0/0x7e0 fs/read_write.c:605 ksys_write+0xce/0x180 fs/read_write.c:658 __do_sys_write fs/read_write.c:670 [inline] __se_sys_write fs/read_write.c:667 [inline] __x64_sys_write+0x3e/0x50 fs/read_write.c:667 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: 11966 Comm: syz-executor.4 Not tainted 5.11.0-rc5-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================