syzbot

BUG: workqueue lockup - pool cpus=0 node=0 flags=0x0 nice=0 stuck for 207s!
BUG: workqueue lockup - pool cpus=1 node=0 flags=0x0 nice=0 stuck for 208s!
Showing busy workqueues and worker pools:
workqueue events: flags=0x0
  pwq 2: cpus=1 node=0 flags=0x0 nice=0 active=2/256 refcnt=3
    pending: psi_avgs_work, ovs_dp_masks_rebalance
  pwq 0: cpus=0 node=0 flags=0x0 nice=0 active=2/256 refcnt=3
    in-flight: 8:request_firmware_work_func
    pending: vmstat_shepherd
workqueue events_long: flags=0x0
  pwq 2: cpus=1 node=0 flags=0x0 nice=0 active=1/256 refcnt=2
    pending: defense_work_handler
workqueue events_unbound: flags=0x2
  pwq 4: cpus=0-1 flags=0x4 nice=0 active=2/512 refcnt=3
    pending: toggle_allocation_gate, crng_reseed
  pwq 4: cpus=0-1 flags=0x4 nice=0 active=1/512 refcnt=2
    pending: flush_memcg_stats_dwork
workqueue events_freezable: flags=0x4
  pwq 0: cpus=0 node=0 flags=0x0 nice=0 active=1/256 refcnt=2
    pending: update_balloon_stats_func
workqueue events_power_efficient: flags=0x80
  pwq 2: cpus=1 node=0 flags=0x0 nice=0 active=6/256 refcnt=7
    pending: neigh_managed_work, neigh_periodic_work, neigh_managed_work, gc_worker, neigh_periodic_work, do_cache_clean
  pwq 0: cpus=0 node=0 flags=0x0 nice=0 active=2/256 refcnt=3
    pending: reg_check_chans_work, check_lifetime
workqueue writeback: flags=0x4a
  pwq 4: cpus=0-1 flags=0x4 nice=0 active=1/256 refcnt=2
    pending: wb_workfn
workqueue dm_bufio_cache: flags=0x8
  pwq 0: cpus=0 node=0 flags=0x0 nice=0 active=1/256 refcnt=2
    pending: work_fn
workqueue ipv6_addrconf: flags=0xe000a
  pwq 4: cpus=0-1 flags=0x4 nice=0 active=1/1 refcnt=4
    pending: addrconf_verify_work
workqueue krxrpcd: flags=0xa001a
  pwq 5: cpus=0-1 node=0 flags=0x4 nice=-20 active=1/1 refcnt=4
    pending: rxrpc_peer_keepalive_worker
pool 0: cpus=0 node=0 flags=0x0 nice=0 hung=207s workers=3 idle: 786 9
Showing backtraces of running workers in stalled CPU-bound worker pools:
pool 0:
task:kworker/0:0     state:R  running task     stack:24344 pid:8     ppid:2      flags:0x00004000
Workqueue: events request_firmware_work_func
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5380 [inline]
 __schedule+0x14d2/0x44d0 kernel/sched/core.c:6699
 schedule+0xbd/0x170 kernel/sched/core.c:6773
 schedule_timeout+0x160/0x280 kernel/time/timer.c:2168
 do_wait_for_common kernel/sched/completion.c:95 [inline]
 __wait_for_common kernel/sched/completion.c:116 [inline]
 wait_for_common kernel/sched/completion.c:127 [inline]
 wait_for_completion_killable_timeout+0x34f/0x610 kernel/sched/completion.c:288
 __fw_state_wait_common drivers/base/firmware_loader/firmware.h:103 [inline]
 fw_sysfs_wait_timeout drivers/base/firmware_loader/fallback.c:44 [inline]
 fw_load_sysfs_fallback drivers/base/firmware_loader/fallback.c:106 [inline]
 fw_load_from_user_helper drivers/base/firmware_loader/fallback.c:158 [inline]
 firmware_fallback_sysfs+0x4b7/0x940 drivers/base/firmware_loader/fallback.c:234
 _request_firmware+0xed9/0x1510 drivers/base/firmware_loader/main.c:936
 request_firmware_work_func+0xb0/0x1b0 drivers/base/firmware_loader/main.c:1189
 process_one_work kernel/workqueue.c:2634 [inline]
 process_scheduled_works+0xa45/0x15b0 kernel/workqueue.c:2711
 worker_thread+0xa55/0xfc0 kernel/workqueue.c:2792
 kthread+0x2fa/0x390 kernel/kthread.c:388
 ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:152
 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:293
 </TASK>