================================================================== BUG: KCSAN: data-race in delete_from_page_cache_batch / folio_mapping write to 0xffffea00054e8018 of 8 bytes by task 3095 on cpu 0: page_cache_delete_batch mm/filemap.c:310 [inline] delete_from_page_cache_batch+0x320/0x760 mm/filemap.c:336 truncate_inode_pages_range+0x1bd/0x6a0 mm/truncate.c:368 truncate_inode_pages mm/truncate.c:448 [inline] truncate_inode_pages_final+0x55/0x60 mm/truncate.c:483 ext4_evict_inode+0xb3/0xdc0 fs/ext4/inode.c:182 evict+0x1aa/0x410 fs/inode.c:664 iput_final fs/inode.c:1775 [inline] iput+0x42c/0x5b0 fs/inode.c:1801 ext4_mb_release+0x540/0x740 fs/ext4/mballoc.c:3778 ext4_put_super+0x1bc/0x7d0 fs/ext4/super.c:1325 generic_shutdown_super+0xdb/0x210 fs/super.c:693 kill_block_super+0x2a/0x60 fs/super.c:1646 ext4_kill_sb+0x44/0x80 fs/ext4/super.c:7305 deactivate_locked_super+0x73/0x1c0 fs/super.c:481 deactivate_super+0x9b/0xb0 fs/super.c:514 cleanup_mnt+0x272/0x2e0 fs/namespace.c:1254 __cleanup_mnt+0x19/0x20 fs/namespace.c:1261 task_work_run+0x135/0x1a0 kernel/task_work.c:180 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] exit_to_user_mode_loop+0xd6/0xe0 kernel/entry/common.c:171 exit_to_user_mode_prepare+0x6c/0xb0 kernel/entry/common.c:204 __syscall_exit_to_user_mode_work kernel/entry/common.c:285 [inline] syscall_exit_to_user_mode+0x26/0x140 kernel/entry/common.c:296 do_syscall_64+0x4d/0xc0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x63/0xcd read to 0xffffea00054e8018 of 8 bytes by task 2280 on cpu 1: folio_mapping+0x92/0x110 mm/util.c:772 folio_evictable mm/internal.h:162 [inline] lru_add_fn+0x8d/0x440 mm/swap.c:181 folio_batch_move_lru+0x21e/0x2f0 mm/swap.c:217 lru_add_drain_cpu+0x77/0x270 mm/swap.c:652 lru_add_and_bh_lrus_drain mm/swap.c:766 [inline] lru_add_drain_per_cpu+0x34/0x90 mm/swap.c:787 process_one_work kernel/workqueue.c:2630 [inline] process_scheduled_works+0x5b8/0xa30 kernel/workqueue.c:2703 worker_thread+0x525/0x730 kernel/workqueue.c:2784 kthread+0x1d7/0x210 kernel/kthread.c:388 ret_from_fork+0x48/0x60 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304 value changed: 0xffff88810674d4e0 -> 0x0000000000000000 Reported by Kernel Concurrency Sanitizer on: CPU: 1 PID: 2280 Comm: kworker/1:0 Not tainted 6.6.0-rc2-syzkaller-00414-g8a511e7efc5a #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/04/2023 Workqueue: mm_percpu_wq lru_add_drain_per_cpu ==================================================================