ext4_test_bit(bit=12, block=18) = 1
is_bad_inode(inode)=0
NEXT_ORPHAN(inode)=2130706432
max_ino=32
i_nlink=1
==================================================================
BUG: KCSAN: data-race in __lru_add_drain_all / folio_add_lru

read-write to 0xffff888237c25ea8 of 1 bytes by task 5266 on cpu 0:
 folio_batch_add include/linux/pagevec.h:77 [inline]
 __folio_batch_add_and_move mm/swap.c:194 [inline]
 folio_add_lru+0xa5/0x1f0 mm/swap.c:511
 folio_add_lru_vma+0x49/0x70 mm/swap.c:530
 do_anonymous_page mm/memory.c:5101 [inline]
 do_pte_missing mm/memory.c:4232 [inline]
 handle_pte_fault mm/memory.c:6052 [inline]
 __handle_mm_fault mm/memory.c:6195 [inline]
 handle_mm_fault+0x281f/0x2c20 mm/memory.c:6364
 faultin_page mm/gup.c:1144 [inline]
 __get_user_pages+0x102e/0x1fa0 mm/gup.c:1446
 __get_user_pages_locked mm/gup.c:1712 [inline]
 __gup_longterm_locked+0x2fb/0xe60 mm/gup.c:2501
 gup_fast_fallback+0x1f5/0x1420 mm/gup.c:3240
 pin_user_pages_fast+0x5f/0x90 mm/gup.c:3346
 io_pin_pages+0xb5/0x170 io_uring/memmap.c:63
 io_region_pin_pages+0x58/0xf0 io_uring/memmap.c:142
 io_create_region+0x2d3/0x330 io_uring/memmap.c:222
 io_allocate_scq_urings+0x14d/0x3b0 io_uring/io_uring.c:3566
 io_uring_create+0x3b3/0x610 io_uring/io_uring.c:3799
 io_uring_setup io_uring/io_uring.c:3889 [inline]
 __do_sys_io_uring_setup io_uring/io_uring.c:3923 [inline]
 __se_sys_io_uring_setup+0x1f7/0x210 io_uring/io_uring.c:3914
 __x64_sys_io_uring_setup+0x31/0x40 io_uring/io_uring.c:3914
 x64_sys_call+0x2b21/0x2ff0 arch/x86/include/generated/asm/syscalls_64.h:426
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xd2/0x200 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

read to 0xffff888237c25ea8 of 1 bytes by task 5261 on cpu 1:
 folio_batch_count include/linux/pagevec.h:56 [inline]
 cpu_needs_drain mm/swap.c:780 [inline]
 __lru_add_drain_all+0x12b/0x3f0 mm/swap.c:874
 lru_add_drain_all+0x10/0x20 mm/swap.c:890
 invalidate_bdev+0x47/0x70 block/bdev.c:101
 ext4_put_super+0x624/0x7d0 fs/ext4/super.c:1339
 generic_shutdown_super+0xe3/0x210 fs/super.c:643
 kill_block_super+0x2a/0x70 fs/super.c:1766
 ext4_kill_sb+0x42/0x80 fs/ext4/super.c:7395
 deactivate_locked_super+0x72/0x1c0 fs/super.c:474
 deactivate_super+0x97/0xa0 fs/super.c:507
 cleanup_mnt+0x269/0x2e0 fs/namespace.c:1375
 __cleanup_mnt+0x19/0x20 fs/namespace.c:1382
 task_work_run+0x12e/0x1a0 kernel/task_work.c:227
 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
 exit_to_user_mode_loop+0xe4/0x100 kernel/entry/common.c:43
 exit_to_user_mode_prepare include/linux/irq-entry-common.h:225 [inline]
 syscall_exit_to_user_mode_work include/linux/entry-common.h:175 [inline]
 syscall_exit_to_user_mode include/linux/entry-common.h:210 [inline]
 do_syscall_64+0x1d6/0x200 arch/x86/entry/syscall_64.c:100
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

value changed: 0x07 -> 0x08

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 UID: 0 PID: 5261 Comm: syz.0.473 Not tainted syzkaller #0 PREEMPT(voluntary) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025
==================================================================