Backtrace

WARNING: CPU: 1 PID: 5297 at mm/vmalloc.c:3367 vfree.part.0+0x113/0x260
Modules linked in: uinput rfcomm snd_seq_dummy snd_hrtimer xt_conntrack xt_MASQUERADE bridge stp llc xt_set ip_set xt_addrtype nft_compat overlay nf_conntrack_netbios_ns nf_conntrack_broadcast nft_fib_inet nft_fib_ipv4 nft_fib_ipv6 nft_fib nft_reject_inet nf_reject_ipv4 nf_reject_ipv6 nft_reject nft_ct nft_chain_nat nf_nat nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 nf_tables qrtr bnep snd_sof_pci_intel_skl snd_sof_intel_hda_generic soundwire_intel soundwire_cadence snd_sof_intel_hda_common snd_soc_hdac_hda snd_sof_intel_hda_mlink snd_sof_intel_hda snd_sof_pci snd_sof_xtensa_dsp snd_sof snd_sof_utils snd_soc_acpi_intel_match snd_soc_acpi_intel_sdca_quirks soundwire_generic_allocation snd_soc_acpi soundwire_bus snd_soc_sdca snd_soc_avs snd_soc_hda_codec snd_hda_ext_core sunrpc snd_soc_core snd_hda_codec_hdmi intel_uncore_frequency snd_hda_codec_generic snd_compress intel_uncore_frequency_common ac97_bus iwlmvm snd_pcm_dmaengine snd_hda_intel snd_intel_dspcfg intel_tcc_cooling x86_pkg_temp_thermal
 snd_intel_sdw_acpi intel_powerclamp coretemp snd_hda_codec kvm_intel snd_hda_core mac80211 snd_hwdep libarc4 uvcvideo snd_seq kvm jc42 snd_seq_device snd_pcm uvc iwlwifi videobuf2_vmalloc asus_nb_wmi iTCO_wdt intel_pmc_bxt videobuf2_memops asus_wmi mei_hdcp irqbypass iTCO_vendor_support ee1004 videobuf2_v4l2 btusb snd_timer mei_pxp rapl intel_rapl_msr processor_thermal_device_pci_legacy btrtl snd sparse_keymap intel_cstate btintel platform_profile processor_thermal_device vfat videobuf2_common i2c_i801 soundcore intel_uncore processor_thermal_wt_hint btbcm btmtk wmi_bmof cfg80211 fat processor_thermal_rfim pcspkr bluetooth processor_thermal_rapl i2c_smbus mei_me idma64 intel_rapl_common mei processor_thermal_wt_req intel_pch_thermal processor_thermal_power_floor rfkill processor_thermal_mbox int340x_thermal_zone intel_xhci_usb_role_switch intel_soc_dts_iosf intel_pmc_core pmt_telemetry pmt_class intel_vsec int3400_thermal asus_wireless acpi_pad acpi_thermal_rel joydev v4l2loopback(OE) loop nfnetlink zram
 lz4hc_compress lz4_compress i915 i2c_algo_bit drm_buddy ttm drm_display_helper polyval_clmulni polyval_generic ghash_clmulni_intel sha512_ssse3 spi_pxa2xx_platform hid_multitouch sha256_ssse3 dw_dmac spi_pxa2xx_core sha1_ssse3 cec i2c_hid_acpi i2c_hid video wmi serio_raw i2c_dev fuse v4l2loopback_dc(OE) videodev mc
CPU: 1 UID: 1000 PID: 5297 Comm: VideoDevicePoll Tainted: G        W  OE      6.14.11-300.fc42.x86_64 #1
Tainted: [W]=WARN, [O]=OOT_MODULE, [E]=UNSIGNED_MODULE
Hardware name: ASUSTeK COMPUTER INC. X510UA/X510UA, BIOS X510UA.312 04/29/2020
RIP: 0010:vfree.part.0+0x113/0x260
Code: 48 8b 7b 20 e8 ae ac fa ff 48 89 df 48 83 c4 20 5b 5d 41 5c 41 5e e9 cc 04 02 00 48 89 ee 48 c7 c7 90 0f e5 a9 e8 7d 2f cb ff <0f> 0b 48 83 c4 20 5b 5d 41 5c 41 5e c3 cc cc cc cc 85 c0 0f 84 21
RSP: 0018:ffffd195c78cfc20 EFLAGS: 00010246
RAX: 0000000000000000 RBX: ffff8d9e81c0e000 RCX: 0000000000000027
RDX: ffff8da1ceca1948 RSI: 0000000000000001 RDI: ffff8da1ceca1940
RBP: ffffd196084a8000 R08: 0000000000000000 R09: ffffd195c78cfac8
R10: ffffffffaa9368e8 R11: 00000000ffffdfff R12: ffff8d9e8889abe8
R13: ffff8da0d4513520 R14: ffff8d9e80463180 R15: 0000000000000000
FS:  00007f9abe3236c0(0000) GS:ffff8da1cec80000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00002bf40c59e000 CR3: 00000002a41d8001 CR4: 00000000003726f0
Call Trace:
 <TASK>
 v4l2_loopback_close+0x8b/0xf0 [v4l2loopback_dc]
 v4l2_release+0xd1/0x100 [videodev]
 __fput+0xe3/0x2a0
 __x64_sys_close+0x3c/0x80
 do_syscall_64+0x7b/0x160
 ? v4l2_ioctl+0x67/0xb0 [videodev]
 ? __x64_sys_ioctl+0x56/0xc0
 ? syscall_exit_to_user_mode+0x10/0x210
 ? do_syscall_64+0x87/0x160
 ? rcu_accelerate_cbs+0x1c1/0x1f0
 ? __note_gp_changes+0x27b/0x350
 ? note_gp_changes+0x75/0x90
 ? sched_clock+0x10/0x30
 ? sched_clock_cpu+0xf/0x230
 ? rcu_core+0x199/0x350
 ? irqtime_account_irq+0x3c/0xc0
 ? handle_softirqs+0x1ae/0x340
 ? sched_clock+0x10/0x30
 ? __irq_exit_rcu+0x4c/0xf0
 entry_SYSCALL_64_after_hwframe+0x76/0x7e
RIP: 0033:0x7f9b46c489cc
Code: 0f 05 48 3d 00 f0 ff ff 77 3c c3 0f 1f 00 55 48 89 e5 48 83 ec 10 89 7d fc e8 f0 98 f8 ff 8b 7d fc 89 c2 b8 03 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 2c 89 d7 89 45 fc e8 52 99 f8 ff 8b 45 fc c9
RSP: 002b:00007f9abe3223f0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
RAX: ffffffffffffffda RBX: 0000000000000038 RCX: 00007f9b46c489cc
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000038
RBP: 00007f9abe322400 R08: 0000000000000000 R09: 00000000ffffffff
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f9abf9ef8f0 R15: 00007f9abe3224f0
 </TASK>