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BUG: KCSAN: data-race in __lru_add_drain_all / __pagevec_lru_add

write to 0xffff888237c266a8 of 1 bytes by task 15964 on cpu 0:
 pagevec_reinit include/linux/pagevec.h:56 [inline]
 __pagevec_lru_add+0x243/0x270 mm/swap.c:1075
 lru_add_drain_cpu+0x6a/0x260 mm/swap.c:612
 lru_add_drain mm/swap.c:716 [inline]
 __pagevec_release+0x4b/0xc0 mm/swap.c:996
 pagevec_release include/linux/pagevec.h:81 [inline]
 shmem_undo_range+0x38f/0xdb0 mm/shmem.c:957
 shmem_truncate_range mm/shmem.c:1056 [inline]
 shmem_evict_inode+0x115/0x560 mm/shmem.c:1138
 evict+0x1aa/0x410 fs/inode.c:588
 iput_final fs/inode.c:1664 [inline]
 iput+0x3fa/0x510 fs/inode.c:1690
 dentry_unlink_inode+0x23d/0x250 fs/dcache.c:376
 __dentry_kill+0x293/0x450 fs/dcache.c:582
 dput+0x218/0x430 fs/dcache.c:888
 __fput+0x3e4/0x520 fs/file_table.c:293
 ____fput+0x11/0x20 fs/file_table.c:313
 task_work_run+0x8e/0x110 kernel/task_work.c:164
 tracehook_notify_resume include/linux/tracehook.h:189 [inline]
 exit_to_user_mode_loop kernel/entry/common.c:175 [inline]
 exit_to_user_mode_prepare+0x160/0x190 kernel/entry/common.c:207
 __syscall_exit_to_user_mode_work kernel/entry/common.c:289 [inline]
 syscall_exit_to_user_mode+0x20/0x40 kernel/entry/common.c:300
 do_syscall_64+0x50/0xa0 arch/x86/entry/common.c:86
 entry_SYSCALL_64_after_hwframe+0x44/0xae

read to 0xffff888237c266a8 of 1 bytes by task 15943 on cpu 1:
 pagevec_count include/linux/pagevec.h:61 [inline]
 __lru_add_drain_all+0x12c/0x3e0 mm/swap.c:834
 lru_add_drain_all+0xc/0x10 mm/swap.c:856
 invalidate_bdev+0x56/0x80 block/bdev.c:88
 invalidate_disk+0x25/0xb0 block/genhd.c:644
 __loop_clr_fd+0x41f/0x6c0 drivers/block/loop.c:1147
 loop_clr_fd drivers/block/loop.c:1237 [inline]
 lo_ioctl+0x985/0x1270 drivers/block/loop.c:1562
 blkdev_ioctl+0x20e/0x440 block/ioctl.c:597
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:874 [inline]
 __se_sys_ioctl+0xcb/0x140 fs/ioctl.c:860
 __x64_sys_ioctl+0x3f/0x50 fs/ioctl.c:860
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x44/0xa0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae

value changed: 0x05 -> 0x00

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 15943 Comm: syz-executor.0 Tainted: G        W         5.15.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
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