Backtrace

WARNING: CPU: 2 PID: 62100 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 snd_sof_intel_hda_sdw_bpt snd_sof_intel_hda_common snd_soc_hdac_hda snd_sof_intel_hda_mlink snd_sof_intel_hda soundwire_cadence snd_sof_pci snd_sof_xtensa_dsp snd_sof snd_sof_utils snd_soc_acpi_intel_match sunrpc snd_soc_acpi_intel_sdca_quirks soundwire_generic_allocation snd_soc_acpi crc8 soundwire_bus snd_soc_sdca intel_uncore_frequency snd_soc_avs intel_uncore_frequency_common snd_soc_hda_codec snd_hda_ext_core intel_tcc_cooling x86_pkg_temp_thermal snd_soc_core snd_hda_codec_hdmi intel_powerclamp snd_hda_codec_generic coretemp snd_compress ac97_bus
 snd_pcm_dmaengine kvm_intel snd_hda_intel snd_intel_dspcfg snd_intel_sdw_acpi jc42 snd_hda_codec iwlmvm iTCO_wdt intel_pmc_bxt ee1004 kvm iTCO_vendor_support mac80211 intel_rapl_msr snd_hda_core mei_hdcp mei_pxp snd_hwdep btusb snd_seq libarc4 snd_seq_device irqbypass snd_pcm rapl intel_cstate btrtl uvcvideo processor_thermal_device_pci_legacy asus_nb_wmi processor_thermal_device iwlwifi btintel uvc processor_thermal_wt_hint asus_wmi processor_thermal_rfim videobuf2_vmalloc btbcm snd_timer intel_uncore processor_thermal_rapl videobuf2_memops btmtk sparse_keymap pcspkr platform_profile snd videobuf2_v4l2 intel_rapl_common wmi_bmof i2c_i801 cfg80211 bluetooth i2c_smbus videobuf2_common soundcore processor_thermal_wt_req mei_me processor_thermal_power_floor mei idma64 rfkill processor_thermal_mbox vfat intel_pch_thermal fat int340x_thermal_zone intel_soc_dts_iosf intel_xhci_usb_role_switch intel_pmc_core int3400_thermal acpi_thermal_rel pmt_telemetry pmt_class intel_vsec asus_wireless joydev acpi_pad
 v4l2loopback(OE) v4l2loopback_dc(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 sha1_ssse3 spi_pxa2xx_core cec i2c_hid_acpi i2c_hid video wmi serio_raw i2c_dev fuse videodev mc
CPU: 2 UID: 1000 PID: 62100 Comm: VideoDevicePoll Tainted: G        W  OE       6.15.4-200.fc42.x86_64 #1 PREEMPT(lazy) 
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 7e 13 02 00 48 89 df 48 83 c4 20 5b 5d 41 5c 41 5e e9 5c 0e 02 00 48 89 ee 48 c7 c7 00 c4 e5 b5 e8 ed 92 ca 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:ffffd51487cf3b60 EFLAGS: 00010246
RAX: 0000000000000000 RBX: ffff8dce81f7b000 RCX: 0000000000000027
RDX: ffff8dd1ced1cb88 RSI: 0000000000000001 RDI: ffff8dd1ced1cb80
RBP: ffffd514b3178000 R08: 0000000000000000 R09: ffffd51487cf3a08
R10: ffffffffb693bb88 R11: 00000000ffffdfff R12: ffff8dce8ab5e5b8
R13: ffff8dcf39057820 R14: ffff8dce8b0eb180 R15: 0000000000000000
FS:  00007f28dcd916c0(0000) GS:ffff8dd217571000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000055401723920 CR3: 000000011a80a004 CR4: 00000000003726f0
Call Trace:
 <TASK>
 v4l2_loopback_close+0x8b/0xf0 [v4l2loopback_dc]
 v4l2_release+0xd1/0x100 [videodev]
 __fput+0xe3/0x2a0
 __x64_sys_close+0x3d/0x80
 do_syscall_64+0x7b/0x160
 ? alloc_fd+0xbd/0x110
 ? do_sys_openat2+0xa2/0xe0
 ? __x64_sys_openat+0x61/0xa0
 ? syscall_exit_to_user_mode+0x10/0x210
 ? do_syscall_64+0x87/0x160
 ? alloc_fd+0xbd/0x110
 ? do_sys_openat2+0xa2/0xe0
 ? __x64_sys_openat+0x61/0xa0
 ? syscall_exit_to_user_mode+0x10/0x210
 ? do_syscall_64+0x87/0x160
 ? __x64_sys_openat+0x61/0xa0
 ? syscall_exit_to_user_mode+0x10/0x210
 ? do_syscall_64+0x87/0x160
 ? common_interrupt+0x47/0xa0
 entry_SYSCALL_64_after_hwframe+0x76/0x7e
RIP: 0033:0x7f296556ca0c
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 b0 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 12 99 f8 ff 8b 45 fc c9
RSP: 002b:00007f28dcd903c0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
RAX: ffffffffffffffda RBX: 000000000000003e RCX: 00007f296556ca0c
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 000000000000003e
RBP: 00007f28dcd903d0 R08: 0000000000000000 R09: 00000000ffffffff
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f28de402af0 R15: 00007f28dcd904c0
 </TASK>