ext4: Bad value for 'debug_want_extra_isize'
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BUG: KCSAN: data-race in __lru_add_drain_all / folio_add_lru_vma

read-write to 0xffff888237d2abc8 of 1 bytes by task 30413 on cpu 1:
 folio_batch_add include/linux/pagevec.h:77 [inline]
 folio_batch_add_and_move mm/swap.c:246 [inline]
 folio_add_lru mm/swap.c:532 [inline]
 folio_add_lru_vma+0x74/0x170 mm/swap.c:552
 wp_page_copy mm/memory.c:3329 [inline]
 do_wp_page+0x1556/0x1e70 mm/memory.c:3658
 handle_pte_fault mm/memory.c:5314 [inline]
 __handle_mm_fault mm/memory.c:5439 [inline]
 handle_mm_fault+0xb7f/0x27e0 mm/memory.c:5604
 do_user_addr_fault arch/x86/mm/fault.c:1413 [inline]
 handle_page_fault arch/x86/mm/fault.c:1505 [inline]
 exc_page_fault+0x2f5/0x6d0 arch/x86/mm/fault.c:1563
 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623
 __put_user_nocheck_4+0x7/0x20 arch/x86/lib/putuser.S:95
 ____sys_recvmsg+0x1a3/0x280 net/socket.c:2816
 ___sys_recvmsg net/socket.c:2845 [inline]
 do_recvmmsg+0x2eb/0x720 net/socket.c:2939
 __sys_recvmmsg net/socket.c:3018 [inline]
 __do_sys_recvmmsg net/socket.c:3041 [inline]
 __se_sys_recvmmsg net/socket.c:3034 [inline]
 __x64_sys_recvmmsg+0xe2/0x170 net/socket.c:3034
 do_syscall_64+0xd3/0x1d0
 entry_SYSCALL_64_after_hwframe+0x6d/0x75

read to 0xffff888237d2abc8 of 1 bytes by task 30418 on cpu 0:
 folio_batch_count include/linux/pagevec.h:56 [inline]
 cpu_needs_drain mm/swap.c:810 [inline]
 __lru_add_drain_all+0x137/0x420 mm/swap.c:904
 lru_add_drain_all+0x10/0x20 mm/swap.c:920
 invalidate_bdev block/bdev.c:95 [inline]
 bdev_mark_dead+0xef/0x120 block/bdev.c:1122
 disk_force_media_change+0xb6/0xf0 block/disk-events.c:298
 __loop_clr_fd+0x270/0x3f0 drivers/block/loop.c:1170
 loop_clr_fd drivers/block/loop.c:1253 [inline]
 lo_ioctl+0xea6/0x1330 drivers/block/loop.c:1555
 blkdev_ioctl+0x37f/0x470 block/ioctl.c:640
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:904 [inline]
 __se_sys_ioctl+0xd3/0x150 fs/ioctl.c:890
 __x64_sys_ioctl+0x43/0x50 fs/ioctl.c:890
 do_syscall_64+0xd3/0x1d0
 entry_SYSCALL_64_after_hwframe+0x6d/0x75

value changed: 0x01 -> 0x02

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 30418 Comm: syz-executor.4 Not tainted 6.8.0-syzkaller-13182-g484193fecd2b #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/29/2024
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