================================================================== BUG: KCSAN: data-race in xas_find_marked / xas_init_marks write to 0xffff8880bae47468 of 8 bytes by task 11496 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:337 [inline] delete_from_page_cache_batch+0x418/0x850 mm/filemap.c:358 truncate_inode_pages_range+0x482/0xf70 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+0x7d7/0xa80 fs/attr.c:336 do_truncate+0xe0/0x120 fs/open.c:64 handle_truncate fs/namei.c:2909 [inline] do_open fs/namei.c:3255 [inline] path_openat+0x1a31/0x20a0 fs/namei.c:3368 do_filp_open+0xbd/0x1d0 fs/namei.c:3395 do_sys_openat2+0x33b/0x500 fs/open.c:1168 do_sys_open fs/open.c:1184 [inline] __do_sys_creat fs/open.c:1258 [inline] __se_sys_creat fs/open.c:1252 [inline] __x64_sys_creat+0x62/0x80 fs/open.c:1252 do_syscall_64+0x39/0x80 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 read to 0xffff8880bae47468 of 8 bytes by task 11454 on cpu 1: xas_find_chunk include/linux/xarray.h:1625 [inline] xas_find_marked+0x22f/0x6b0 lib/xarray.c:1198 xas_next_marked include/linux/xarray.h:1661 [inline] find_get_pages_range_tag+0x3b6/0x5b0 mm/filemap.c:2074 pagevec_lookup_range_tag+0x37/0x50 mm/swap.c:1122 mpage_prepare_extent_to_map+0x19c/0x650 fs/ext4/inode.c:2558 ext4_writepages+0x97d/0x1ed0 fs/ext4/inode.c:2779 do_writepages+0x7b/0x150 mm/page-writeback.c:2352 __filemap_fdatawrite_range+0x19b/0x1d0 mm/filemap.c:422 __filemap_fdatawrite mm/filemap.c:430 [inline] filemap_flush+0x1f/0x30 mm/filemap.c:457 ext4_alloc_da_blocks+0x4c/0x130 fs/ext4/inode.c:3145 ext4_release_file+0x5b/0x1c0 fs/ext4/file.c:142 __fput+0x246/0x4d0 fs/file_table.c:281 ____fput+0x11/0x20 fs/file_table.c:314 task_work_run+0x8e/0x110 kernel/task_work.c:141 get_signal+0x11cf/0x1650 kernel/signal.c:2561 arch_do_signal+0x25/0x270 arch/x86/kernel/signal.c:811 exit_to_user_mode_loop kernel/entry/common.c:161 [inline] exit_to_user_mode_prepare+0x124/0x210 kernel/entry/common.c:192 syscall_exit_to_user_mode+0x16/0x30 kernel/entry/common.c:267 do_syscall_64+0x45/0x80 arch/x86/entry/common.c:56 entry_SYSCALL_64_after_hwframe+0x44/0xa9 Reported by Kernel Concurrency Sanitizer on: CPU: 1 PID: 11454 Comm: syz-executor.5 Not tainted 5.9.0-rc7-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================