FAT-fs (loop7): Unrecognized mount option "utf" or missing value ============================= 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/u4:1/32: #0: ffff888007861138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x915/0x16a0 #1: ffff8880097bfdb0 ((work_completion)(&ctx->exit_work)){+.+.}-{0:0}, at: process_one_work+0x949/0x16a0 stack backtrace: CPU: 0 PID: 32 Comm: kworker/u4:1 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 FAT-fs (loop7): Unrecognized mount option "utf" or missing value ISOFS: Unable to identify CD-ROM format. loop6: detected capacity change from 0 to 10 FAT-fs (loop7): Unrecognized mount option "utf" or missing value SELinux: unrecognized netlink message: protocol=0 nlmsg_type=58898 sclass=netlink_route_socket pid=4065 comm=syz-executor.5 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=58898 sclass=netlink_route_socket pid=4075 comm=syz-executor.5 loop7: detected capacity change from 0 to 512 ext2: Unknown parameter 'e;' loop3: detected capacity change from 0 to 264192 loop6: detected capacity change from 0 to 10 FAT-fs (loop3): bogus number of reserved sectors FAT-fs (loop3): Can't find a valid FAT filesystem loop3: detected capacity change from 0 to 264192 FAT-fs (loop3): bogus number of reserved sectors FAT-fs (loop3): Can't find a valid FAT filesystem loop7: detected capacity change from 0 to 512 ext2: Unknown parameter 'e;'