================================================================== BUG: KCSAN: data-race in xas_find_marked / xas_init_marks read-write to 0xffff8881171ae6c8 of 8 bytes by task 19604 on cpu 0: instrument_read_write include/linux/instrumented.h:55 [inline] __instrument_read_write_bitop include/asm-generic/bitops/instrumented-non-atomic.h:84 [inline] ___test_and_clear_bit include/asm-generic/bitops/instrumented-non-atomic.h:114 [inline] node_clear_mark lib/xarray.c:102 [inline] xas_clear_mark lib/xarray.c:915 [inline] xas_init_marks+0x17e/0x320 lib/xarray.c:948 xas_store+0x213/0xc90 lib/xarray.c:810 page_cache_delete_batch mm/filemap.c:322 [inline] delete_from_page_cache_batch+0x31c/0x700 mm/filemap.c:344 truncate_inode_pages_range+0x1c5/0x6b0 mm/truncate.c:343 truncate_inode_pages mm/truncate.c:423 [inline] truncate_pagecache+0x53/0x70 mm/truncate.c:727 ext4_setattr+0xa07/0xeb0 fs/ext4/inode.c:5490 notify_change+0x85c/0x8e0 fs/attr.c:503 do_truncate+0x116/0x160 fs/open.c:65 handle_truncate fs/namei.c:3395 [inline] do_open fs/namei.c:3778 [inline] path_openat+0x1c03/0x1fa0 fs/namei.c:3933 do_filp_open+0xf7/0x200 fs/namei.c:3960 do_sys_openat2+0xab/0x120 fs/open.c:1415 do_sys_open fs/open.c:1430 [inline] __do_sys_openat fs/open.c:1446 [inline] __se_sys_openat fs/open.c:1441 [inline] __x64_sys_openat+0xf3/0x120 fs/open.c:1441 x64_sys_call+0x1025/0x2d60 arch/x86/include/generated/asm/syscalls_64.h:258 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xc9/0x1c0 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f read to 0xffff8881171ae6c8 of 8 bytes by task 19593 on cpu 1: xas_find_chunk include/linux/xarray.h:1733 [inline] xas_find_marked+0x216/0x660 lib/xarray.c:1370 find_get_entry+0x54/0x390 mm/filemap.c:1994 filemap_get_folios_tag+0x136/0x210 mm/filemap.c:2261 mpage_prepare_extent_to_map+0x329/0xb80 fs/ext4/inode.c:2437 ext4_do_writepages+0xa20/0x2130 fs/ext4/inode.c:2722 ext4_writepages+0x159/0x2e0 fs/ext4/inode.c:2813 do_writepages+0x1d8/0x480 mm/page-writeback.c:2683 filemap_fdatawrite_wbc+0xdb/0x100 mm/filemap.c:398 __filemap_fdatawrite_range mm/filemap.c:431 [inline] file_write_and_wait_range+0xc4/0x250 mm/filemap.c:788 generic_buffers_fsync_noflush+0x46/0x120 fs/buffer.c:600 ext4_fsync_nojournal fs/ext4/fsync.c:88 [inline] ext4_sync_file+0x1ff/0x6c0 fs/ext4/fsync.c:151 vfs_fsync_range+0x116/0x130 fs/sync.c:188 generic_write_sync include/linux/fs.h:2871 [inline] ext4_buffered_write_iter+0x326/0x370 fs/ext4/file.c:305 ext4_file_write_iter+0x293/0xe10 new_sync_write fs/read_write.c:590 [inline] vfs_write+0x77f/0x920 fs/read_write.c:683 ksys_pwrite64 fs/read_write.c:798 [inline] __do_sys_pwrite64 fs/read_write.c:808 [inline] __se_sys_pwrite64 fs/read_write.c:805 [inline] __x64_sys_pwrite64+0xf7/0x150 fs/read_write.c:805 x64_sys_call+0x9d5/0x2d60 arch/x86/include/generated/asm/syscalls_64.h:19 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xc9/0x1c0 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f value changed: 0xfff8000000000000 -> 0xc000000000000000 Reported by Kernel Concurrency Sanitizer on: CPU: 1 UID: 0 PID: 19593 Comm: syz.1.3427 Not tainted 6.12.0-rc6-syzkaller-00169-g906bd684e4b1 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 ================================================================== syz.1.3427 (19593) used greatest stack depth: 9640 bytes left