BTRFS error (device loop3): superblock checksum mismatch
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BUG: KCSAN: data-race in lru_add_drain_all / lru_cache_add

write to 0xffff88813bc27550 of 1 bytes by task 22503 on cpu 0:
 pagevec_add include/linux/pagevec.h:74 [inline]
 lru_cache_add+0x7c/0x160 mm/swap.c:461
 lru_cache_add_inactive_or_unevictable+0x46/0x160 mm/swap.c:493
 do_anonymous_page+0x811/0xd20 mm/memory.c:3587
 handle_pte_fault mm/memory.c:4316 [inline]
 __handle_mm_fault mm/memory.c:4453 [inline]
 handle_mm_fault+0x102d/0x1840 mm/memory.c:4551
 faultin_page mm/gup.c:850 [inline]
 __get_user_pages+0xa47/0x1000 mm/gup.c:1069
 __get_user_pages_locked mm/gup.c:1255 [inline]
 __get_user_pages_remote+0x226/0x6e0 mm/gup.c:1722
 get_user_pages_remote+0x6f/0xa0 mm/gup.c:1795
 get_arg_page fs/exec.c:223 [inline]
 copy_string_kernel+0x174/0x370 fs/exec.c:634
 kernel_execve+0x397/0x640 fs/exec.c:1960
 call_usermodehelper_exec_async+0x1a1/0x250 kernel/umh.c:110
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294

read to 0xffff88813bc27550 of 1 bytes by task 22448 on cpu 1:
 pagevec_count include/linux/pagevec.h:61 [inline]
 lru_add_drain_all+0x108/0x3c0 mm/swap.c:813
 invalidate_bdev+0x50/0x70 fs/block_dev.c:96
 btrfs_close_bdev fs/btrfs/volumes.c:1116 [inline]
 btrfs_close_one_device fs/btrfs/volumes.c:1135 [inline]
 close_fs_devices+0x25e/0x4d0 fs/btrfs/volumes.c:1165
 btrfs_close_devices+0x44/0x210 fs/btrfs/volumes.c:1180
 open_ctree+0x529/0x230b fs/btrfs/disk-io.c:3599
 btrfs_fill_super fs/btrfs/super.c:1356 [inline]
 btrfs_mount_root+0x742/0x830 fs/btrfs/super.c:1723
 legacy_get_tree+0x70/0xc0 fs/fs_context.c:592
 vfs_get_tree+0x4a/0x1a0 fs/super.c:1497
 fc_mount fs/namespace.c:993 [inline]
 vfs_kern_mount+0xc6/0x130 fs/namespace.c:1023
 btrfs_mount+0x278/0x740 fs/btrfs/super.c:1783
 legacy_get_tree+0x70/0xc0 fs/fs_context.c:592
 vfs_get_tree+0x4a/0x1a0 fs/super.c:1497
 do_new_mount fs/namespace.c:2903 [inline]
 path_mount+0x11b9/0x1c00 fs/namespace.c:3233
 do_mount fs/namespace.c:3246 [inline]
 __do_sys_mount fs/namespace.c:3454 [inline]
 __se_sys_mount+0x23d/0x2e0 fs/namespace.c:3431
 __x64_sys_mount+0x63/0x70 fs/namespace.c:3431
 do_syscall_64+0x39/0x80 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xae

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 22448 Comm: syz-executor.2 Not tainted 5.12.0-rc6-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
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BTRFS error (device loop3): open_ctree failed