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BUG: KCSAN: data-race in __lru_add_drain_all / folio_batch_move_lru

write to 0xffff888237d279c0 of 1 bytes by task 31285 on cpu 1:
 folio_batch_init include/linux/pagevec.h:102 [inline]
 folio_batch_move_lru+0x268/0x2a0 mm/swap.c:254
 lru_add_drain_cpu+0x73/0x250 mm/swap.c:626
 lru_add_drain+0x21/0x60 mm/swap.c:730
 __pagevec_release+0x3a/0x70 mm/swap.c:1029
 pagevec_release include/linux/pagevec.h:71 [inline]
 folio_batch_release include/linux/pagevec.h:135 [inline]
 truncate_inode_pages_range+0x442/0xae0 mm/truncate.c:373
 truncate_inode_pages+0x20/0x30 mm/truncate.c:452
 kill_bdev block/bdev.c:75 [inline]
 set_blocksize+0x24e/0x270 block/bdev.c:151
 sb_set_blocksize+0x2c/0xa0 block/bdev.c:160
 __ext4_fill_super fs/ext4/super.c:4753 [inline]
 ext4_fill_super+0x228b/0x5010 fs/ext4/super.c:5517
 get_tree_bdev+0x2b4/0x3b0 fs/super.c:1294
 ext4_get_tree+0x18/0x20 fs/ext4/super.c:5547
 vfs_get_tree+0x49/0x190 fs/super.c:1501
 do_new_mount+0x200/0x650 fs/namespace.c:3040
 path_mount+0x4ad/0xbb0 fs/namespace.c:3370
 do_mount fs/namespace.c:3383 [inline]
 __do_sys_mount fs/namespace.c:3591 [inline]
 __se_sys_mount+0x281/0x2d0 fs/namespace.c:3568
 __x64_sys_mount+0x63/0x70 fs/namespace.c:3568
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

read to 0xffff888237d279c0 of 1 bytes by task 31274 on cpu 0:
 folio_batch_count include/linux/pagevec.h:108 [inline]
 cpu_needs_drain mm/swap.c:773 [inline]
 __lru_add_drain_all+0x21b/0x450 mm/swap.c:867
 lru_add_drain_all+0xc/0x10 mm/swap.c:883
 invalidate_bdev+0x56/0x80 block/bdev.c:85
 invalidate_disk+0x25/0xb0 block/genhd.c:672
 __loop_clr_fd+0x176/0x3c0 drivers/block/loop.c:1159
 loop_clr_fd drivers/block/loop.c:1252 [inline]
 lo_ioctl+0xd8c/0x1290 drivers/block/loop.c:1558
 blkdev_ioctl+0x20e/0x440 block/ioctl.c:614
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:870 [inline]
 __se_sys_ioctl+0xcb/0x140 fs/ioctl.c:856
 __x64_sys_ioctl+0x3f/0x50 fs/ioctl.c:856
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

value changed: 0x01 -> 0x00

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 31274 Comm: syz-executor.3 Not tainted 5.19.0-syzkaller-12737-g3466f49dd0dd-dirty #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/22/2022
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