loop1: detected capacity change from 0 to 264192 loop1: detected capacity change from 0 to 258048 9pnet_fd: Insufficient options for proto=fd loop1: detected capacity change from 0 to 264192 ============================= WARNING: suspicious RCU usage 5.17.0-rc3-next-20220207 #1 Not tainted ----------------------------- fs/io_uring.c:9411 suspicious rcu_dereference_protected() usage! other info that might help us debug this: rcu_scheduler_active = 2, debug_locks = 1 2 locks held by kworker/u4:2/37: #0: ffff888007861138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x915/0x16a0 #1: ffff88800bc07db0 ((work_completion)(&ctx->exit_work)){+.+.}-{0:0}, at: process_one_work+0x949/0x16a0 stack backtrace: CPU: 0 PID: 37 Comm: kworker/u4:2 Not tainted 5.17.0-rc3-next-20220207 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.14.0-0-g155821a1990b-prebuilt.qemu.org 04/01/2014 Workqueue: events_unbound io_ring_exit_work Call Trace: dump_stack_lvl+0x8b/0xb3 io_eventfd_unregister+0xee/0x110 io_ring_exit_work+0x77d/0xbec process_one_work+0xa1c/0x16a0 worker_thread+0x637/0x1260 kthread+0x2f0/0x3a0 ret_from_fork+0x22/0x30 loop1: detected capacity change from 0 to 4 loop1: detected capacity change from 0 to 264192 FAT-fs (loop1): Unrecognized mount option "fsuuid=7418d2f-3682-f04e-5b2f-0ae4498d" or missing value loop1: detected capacity change from 0 to 16383 loop1: detected capacity change from 0 to 264192 FAT-fs (loop1): Unrecognized mount option "uid>00000000000000060929" or missing value loop1: detected capacity change from 0 to 264192 loop1: detected capacity change from 0 to 264192 loop1: detected capacity change from 0 to 255 I/O error, dev loop1, sector 0 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 0 Buffer I/O error on dev loop1, logical block 0, async page read loop1: unable to read partition table loop1: partition table beyond EOD, truncated loop1: detected capacity change from 0 to 16383