loop3: detected capacity change from 0 to 4
EXT4-fs (loop3): inodes count not valid: 2856321056 vs 32
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BUG: KCSAN: data-race in __lru_add_drain_all / __pagevec_lru_add

write to 0xffff888237c279a8 of 1 bytes by task 29077 on cpu 0:
 pagevec_reinit include/linux/pagevec.h:57 [inline]
 __pagevec_lru_add+0x2f5/0x320 mm/swap.c:1065
 lru_add_drain_cpu+0x6a/0x260 mm/swap.c:601
 lru_add_drain+0x21/0x60 mm/swap.c:706
 exit_mmap+0xf8/0x380 mm/mmap.c:3143
 __mmput+0x27/0x1b0 kernel/fork.c:1183
 mmput+0x3d/0x50 kernel/fork.c:1205
 exit_mm+0xdb/0x170 kernel/exit.c:510
 do_exit+0x51d/0x1720 kernel/exit.c:782
 do_group_exit+0xa5/0x160 kernel/exit.c:925
 get_signal+0xf54/0x1020 kernel/signal.c:2864
 arch_do_signal_or_restart+0x87/0x2d0 arch/x86/kernel/signal.c:867
 exit_to_user_mode_loop+0x78/0x130 kernel/entry/common.c:166
 exit_to_user_mode_prepare kernel/entry/common.c:201 [inline]
 __syscall_exit_to_user_mode_work kernel/entry/common.c:283 [inline]
 syscall_exit_to_user_mode+0x6a/0x90 kernel/entry/common.c:294
 do_syscall_64+0x37/0x70 arch/x86/entry/common.c:86
 entry_SYSCALL_64_after_hwframe+0x44/0xae

read to 0xffff888237c279a8 of 1 bytes by task 29078 on cpu 1:
 pagevec_count include/linux/pagevec.h:62 [inline]
 __lru_add_drain_all+0x118/0x3e0 mm/swap.c:826
 lru_add_drain_all+0xc/0x10 mm/swap.c:849
 invalidate_bdev+0x56/0x80 block/bdev.c:87
 invalidate_disk+0x25/0xb0 block/genhd.c:676
 __loop_clr_fd+0x3f5/0x640 drivers/block/loop.c:1147
 loop_clr_fd drivers/block/loop.c:1230 [inline]
 lo_ioctl+0xa12/0x11b0 drivers/block/loop.c:1556
 blkdev_ioctl+0x20e/0x440 block/ioctl.c:588
 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+0x44/0xae

value changed: 0x09 -> 0x00

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 29078 Comm: syz-executor.3 Not tainted 5.18.0-rc2-syzkaller-00050-ga19944809fe9-dirty #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
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