Backtrace

WARNING: CPU: 0 PID: 699 at kernel/rcu/tree_plugin.h:318 rcu_note_context_switch+0x4ee/0x690
Modules linked in: sunrpc binfmt_misc vfat fat snd_hda_codec_hdmi snd_hda_codec_conexant snd_hda_codec_generic ledtrig_audio snd_hda_intel intel_rapl_msr snd_intel_dspcfg intel_rapl_common snd_intel_sdw_acpi snd_hda_codec x86_pkg_temp_thermal intel_powerclamp snd_hda_core snd_hwdep snd_seq snd_seq_device snd_pcm coretemp snd_timer kvm_intel kvm mei_pxp joydev dcdbas mei_hdcp irqbypass rapl intel_cstate iTCO_wdt intel_pmc_bxt iTCO_vendor_support mei_me snd soundcore intel_uncore mei pcspkr i2c_i801 i2c_smbus lpc_ich zram i915 crct10dif_pclmul crc32_pclmul crc32c_intel polyval_clmulni polyval_generic ghash_clmulni_intel sha512_ssse3 drm_buddy drm_display_helper serio_raw r8169 cec ttm video wmi ip6_tables ip_tables fuse
CPU: 0 PID: 699 Comm: switcheroo-cont Tainted: G      D            6.1.14-100.fc36.x86_64 #1
Hardware name: Dell Inc. OptiPlex 3010/042P49, BIOS A09 01/31/2013
RIP: 0010:rcu_note_context_switch+0x4ee/0x690
Code: 49 89 3f 49 83 bc 24 98 00 00 00 00 0f 85 66 fe ff ff e9 58 fe ff ff 48 c7 c7 78 df 6e 8f c6 05 ad e8 14 02 01 e8 58 48 be 00 <0f> 0b e9 70 fb ff ff a9 ff ff ff 7f 0f 84 2c fc ff ff 65 48 8b 3c
RSP: 0018:ffffb28cc0cf7cf8 EFLAGS: 00010086
RAX: 000000000000003f RBX: ffff9dff172328c0 RCX: 0000000000000000
RDX: 0000000000000002 RSI: ffffffff8f749b33 RDI: 00000000ffffffff
RBP: 0000000000000000 R08: 0000000000000000 R09: ffffb28cc0cf7b98
R10: 0000000000000003 R11: ffffffff90147448 R12: ffff9dff17231a80
R13: ffff9dfe05d0a880 R14: ffff9dfe002c8d30 R15: ffff9dfe05d0b540
FS:  0000000000000000(0000) GS:ffff9dff17200000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005628b98a7120 CR3: 000000012b010003 CR4: 00000000001706f0
Call Trace:
 <TASK>
 ? finish_task_switch.isra.0+0x9b/0x300
 ? __switch_to+0x106/0x420
 __schedule+0x9b/0x1360
 ? try_to_wake_up+0x83/0x590
 ? preempt_count_add+0x6a/0xa0
 schedule+0x5d/0xe0
 synchronize_rcu_expedited+0x2f7/0x420
 ? kvfree_call_rcu+0x2e0/0x2e0
 ? dequeue_task_stop+0x70/0x70
 ? preempt_count_add+0x47/0xa0
 namespace_unlock+0xae/0x180
 put_mnt_ns+0x69/0x90
 free_nsproxy+0x17/0x1b0
 do_exit+0x333/0xb00
 ? do_syscall_64+0x67/0x80
 ? exit_to_user_mode_prepare+0x165/0x1f0
 make_task_dead+0x7a/0x80
 rewind_stack_and_make_dead+0x17/0x20
RIP: 0033:0x7f925c30342e
Code: Unable to access opcode bytes at 0x7f925c303404.
RSP: 002b:00007ffdf7324f98 EFLAGS: 00000202 ORIG_RAX: 000000000000010b
RAX: ffffffffffffffda RBX: 00005628b98a6180 RCX: 00007f925c30342e
RDX: 00005628b98a6180 RSI: 00007ffdf7325010 RDI: 00000000ffffff9c
RBP: 0000000000001000 R08: 0000000000001001 R09: 0000000000000000
R10: 0000000000001000 R11: 0000000000000202 R12: 0000000000000033
R13: 00007ffdf7325010 R14: 00000000ffffff9c R15: 00007ffdf7324fe0
 </TASK>