================================================================== BUG: KCSAN: data-race in find_get_pages_range_tag / xas_init_marks write to 0xffff888113cca6b0 of 8 bytes by task 29074 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 mm/filemap.c:138 [inline] __delete_from_page_cache+0x21b/0x380 mm/filemap.c:239 delete_from_page_cache+0x84/0x250 mm/filemap.c:274 truncate_inode_page mm/truncate.c:228 [inline] truncate_inode_pages_range+0xbb9/0xf70 mm/truncate.c:449 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 fs/open.c:64 [inline] do_sys_ftruncate+0x39f/0x3e0 fs/open.c:195 __do_sys_ftruncate fs/open.c:205 [inline] __se_sys_ftruncate fs/open.c:203 [inline] __x64_sys_ftruncate+0x2f/0x40 fs/open.c:203 do_syscall_64+0x39/0x80 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 read to 0xffff888113cca6b0 of 8 bytes by task 29071 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/0x5b0 mm/filemap.c:2074 pagevec_lookup_range_tag+0x37/0x50 mm/swap.c:1122 __filemap_fdatawait_range+0xab/0x1b0 mm/filemap.c:519 file_write_and_wait_range+0xea/0x120 mm/filemap.c:765 ext4_sync_file+0xfc/0x6e0 fs/ext4/fsync.c:151 vfs_fsync_range+0x107/0x120 fs/sync.c:200 generic_write_sync include/linux/fs.h:2747 [inline] ext4_buffered_write_iter+0x369/0x3b0 fs/ext4/file.c:276 ext4_file_write_iter+0x768/0x1060 include/linux/fs.h:784 call_write_iter include/linux/fs.h:1882 [inline] new_sync_write fs/read_write.c:503 [inline] vfs_write+0x665/0x6f0 fs/read_write.c:578 ksys_write+0xce/0x180 fs/read_write.c:631 __do_sys_write fs/read_write.c:643 [inline] __se_sys_write fs/read_write.c:640 [inline] __x64_sys_write+0x3e/0x50 fs/read_write.c:640 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: 1 PID: 29071 Comm: syz-executor.0 Not tainted 5.9.0-rc5-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================