================================================================== BUG: KCSAN: data-race in find_get_pages_range_tag / xas_init_marks write to 0xffff888076609228 of 8 bytes by task 22120 on cpu 0: instrument_write include/linux/instrumented.h:42 [inline] __test_and_clear_bit include/asm-generic/bitops/instrumented-non-atomic.h:85 [inline] node_clear_mark lib/xarray.c:100 [inline] xas_clear_mark lib/xarray.c:908 [inline] xas_init_marks+0x17e/0x310 lib/xarray.c:941 xas_store+0x213/0xd00 lib/xarray.c:803 page_cache_delete_batch mm/filemap.c:336 [inline] delete_from_page_cache_batch+0x41e/0x830 mm/filemap.c:357 truncate_inode_pages_range+0x492/0xf10 mm/truncate.c:366 truncate_inode_pages mm/truncate.c:476 [inline] truncate_pagecache+0x4f/0x70 mm/truncate.c:817 ext4_setattr+0xb05/0xec0 fs/ext4/inode.c:5403 notify_change+0x7d7/0xa20 fs/attr.c:336 do_truncate+0xe0/0x120 fs/open.c:64 handle_truncate fs/namei.c:2901 [inline] do_open fs/namei.c:3247 [inline] path_openat+0x1a4c/0x20e0 fs/namei.c:3360 do_filp_open+0xbd/0x1d0 fs/namei.c:3387 do_sys_openat2+0x33c/0x4a0 fs/open.c:1179 do_sys_open fs/open.c:1195 [inline] ksys_open include/linux/syscalls.h:1388 [inline] __do_sys_creat fs/open.c:1263 [inline] __se_sys_creat fs/open.c:1261 [inline] __x64_sys_creat+0x62/0x80 fs/open.c:1261 do_syscall_64+0x51/0xb0 arch/x86/entry/common.c:384 entry_SYSCALL_64_after_hwframe+0x44/0xa9 read to 0xffff888076609228 of 8 bytes by task 22086 on cpu 1: xas_find_chunk include/linux/xarray.h:1625 [inline] xas_next_marked include/linux/xarray.h:1656 [inline] find_get_pages_range_tag+0x30c/0x580 mm/filemap.c:1967 pagevec_lookup_range_tag+0x37/0x50 mm/swap.c:1120 mpage_prepare_extent_to_map+0x19c/0x650 fs/ext4/inode.c:2559 ext4_writepages+0x682/0x1ef0 fs/ext4/inode.c:2736 do_writepages+0x7b/0x150 mm/page-writeback.c:2354 __filemap_fdatawrite_range+0x19b/0x1d0 mm/filemap.c:421 __filemap_fdatawrite mm/filemap.c:429 [inline] filemap_flush+0x1f/0x30 mm/filemap.c:456 ext4_alloc_da_blocks+0x4c/0x130 fs/ext4/inode.c:3146 ext4_release_file+0x5b/0x1c0 fs/ext4/file.c:142 __fput+0x1df/0x460 fs/file_table.c:281 ____fput+0x11/0x20 fs/file_table.c:314 task_work_run+0x8e/0x110 kernel/task_work.c:135 get_signal+0x3f6/0x1650 kernel/signal.c:2547 do_signal+0x25/0x270 arch/x86/kernel/signal.c:810 exit_to_usermode_loop arch/x86/entry/common.c:235 [inline] __prepare_exit_to_usermode+0x127/0x230 arch/x86/entry/common.c:269 __syscall_return_slowpath+0x47/0x60 arch/x86/entry/common.c:352 do_syscall_64+0x5d/0xb0 arch/x86/entry/common.c:393 entry_SYSCALL_64_after_hwframe+0x44/0xa9 Reported by Kernel Concurrency Sanitizer on: CPU: 1 PID: 22086 Comm: syz-executor.0 Not tainted 5.8.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================