loop2: detected capacity change from 0 to 512
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BUG: KCSAN: data-race in data_push_tail / vsnprintf

write to 0xffffffff86e61558 of 1 bytes by task 29799 on cpu 1:
 vsnprintf+0xe2a/0xe80
 vscnprintf+0x3e/0x80 lib/vsprintf.c:2889
 loop_set_size+0x2e/0x70 drivers/block/loop.c:237
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:870 [inline]
 __se_sys_ioctl+0xcb/0x140 fs/ioctl.c:856
 entry_SYSCALL_64_after_hwframe+0x46/0xb0
 vprintk_store+0x51c/0xb50 kernel/printk/printk.c:2326
 loop_set_size+0x2e/0x70 drivers/block/loop.c:237
 entry_SYSCALL_64_after_hwframe+0x46/0xb0
CPU: 0 PID: 29802 Comm: syz-executor.2 Not tainted 5.18.0-syzkaller-11538-ge1cbc3b96a99-dirty #0
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EXT4-fs (loop2): group descriptors corrupted!