================================================================== BUG: KCSAN: data-race in __lru_add_drain_all / deactivate_file_folio read-write to 0xffff888237d2ad08 of 1 bytes by task 3793 on cpu 1: folio_batch_add include/linux/pagevec.h:77 [inline] folio_batch_add_and_move mm/swap.c:246 [inline] deactivate_file_folio+0x66/0x160 mm/swap.c:716 mapping_try_invalidate+0x2be/0x3e0 mm/truncate.c:518 invalidate_mapping_pages+0x27/0x40 mm/truncate.c:549 invalidate_bdev+0x65/0x80 block/bdev.c:96 ext4_put_super+0x51b/0x7e0 fs/ext4/super.c:1361 generic_shutdown_super+0xde/0x210 fs/super.c:641 kill_block_super+0x2a/0x70 fs/super.c:1675 ext4_kill_sb+0x44/0x80 fs/ext4/super.c:7327 deactivate_locked_super+0x7d/0x1c0 fs/super.c:472 deactivate_super+0x9f/0xb0 fs/super.c:505 cleanup_mnt+0x272/0x2e0 fs/namespace.c:1267 __cleanup_mnt+0x19/0x20 fs/namespace.c:1274 task_work_run+0x13a/0x1a0 kernel/task_work.c:180 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline] exit_to_user_mode_loop kernel/entry/common.c:114 [inline] exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline] __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline] syscall_exit_to_user_mode+0xbe/0x130 kernel/entry/common.c:218 do_syscall_64+0xda/0x1d0 arch/x86/entry/common.c:89 entry_SYSCALL_64_after_hwframe+0x77/0x7f read to 0xffff888237d2ad08 of 1 bytes by task 3776 on cpu 0: folio_batch_count include/linux/pagevec.h:56 [inline] cpu_needs_drain mm/swap.c:812 [inline] __lru_add_drain_all+0x1a2/0x420 mm/swap.c:904 lru_add_drain_all+0x10/0x20 mm/swap.c:920 invalidate_bdev+0x54/0x80 block/bdev.c:95 ext4_put_super+0x51b/0x7e0 fs/ext4/super.c:1361 generic_shutdown_super+0xde/0x210 fs/super.c:641 kill_block_super+0x2a/0x70 fs/super.c:1675 ext4_kill_sb+0x44/0x80 fs/ext4/super.c:7327 deactivate_locked_super+0x7d/0x1c0 fs/super.c:472 deactivate_super+0x9f/0xb0 fs/super.c:505 cleanup_mnt+0x272/0x2e0 fs/namespace.c:1267 __cleanup_mnt+0x19/0x20 fs/namespace.c:1274 task_work_run+0x13a/0x1a0 kernel/task_work.c:180 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline] exit_to_user_mode_loop kernel/entry/common.c:114 [inline] exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline] __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline] syscall_exit_to_user_mode+0xbe/0x130 kernel/entry/common.c:218 do_syscall_64+0xda/0x1d0 arch/x86/entry/common.c:89 entry_SYSCALL_64_after_hwframe+0x77/0x7f value changed: 0x01 -> 0x02 Reported by Kernel Concurrency Sanitizer on: CPU: 0 PID: 3776 Comm: syz-executor.4 Not tainted 6.9.0-rc6-syzkaller-00113-g49a73b1652c5 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 ================================================================== EXT4-fs (loop4): unmounting filesystem 00000000-0000-0000-0000-000000000000.