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BUG: KCSAN: data-race in lo_ioctl / lo_ioctl

read-write to 0xffff8881005f0104 of 1 bytes by task 2990 on cpu 1:
 dev_set_uevent_suppress include/linux/device.h:938 [inline]
 loop_change_fd drivers/block/loop.c:638 [inline]
 lo_ioctl+0x124f/0x12e0 drivers/block/loop.c:1561
 blkdev_ioctl+0x375/0x460 block/ioctl.c:633
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:871 [inline]
 __se_sys_ioctl+0xcf/0x140 fs/ioctl.c:857
 __x64_sys_ioctl+0x43/0x50 fs/ioctl.c:857
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0x44/0x110 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x63/0x6b

read-write to 0xffff8881005f0104 of 1 bytes by task 2987 on cpu 0:
 dev_set_uevent_suppress include/linux/device.h:938 [inline]
 loop_change_fd drivers/block/loop.c:638 [inline]
 lo_ioctl+0x124f/0x12e0 drivers/block/loop.c:1561
 blkdev_ioctl+0x375/0x460 block/ioctl.c:633
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:871 [inline]
 __se_sys_ioctl+0xcf/0x140 fs/ioctl.c:857
 __x64_sys_ioctl+0x43/0x50 fs/ioctl.c:857
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0x44/0x110 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x63/0x6b

value changed: 0x17 -> 0x07

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 2987 Comm: syz-executor.1 Not tainted 6.7.0-rc5-syzkaller-00214-gc8e97fc6b4c0 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023
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