Backtrace

WARNING: CPU: 8 PID: 1732 at drivers/char/tpm/tpm_tis_core.c:205 tpm_tis_status+0x66/0x70
Modules linked in: cmac bnep sunrpc vfat fat squashfs loop snd_hda_codec_hdmi snd_sof_pci_intel_cnl snd_sof_intel_hda_common soundwire_intel soundwire_generic_allocation soundwire_cadence snd_sof_intel_hda snd_sof_pci snd_sof snd_sof_xtensa_dsp snd_soc_skl snd_soc_hdac_hda snd_hda_ext_core snd_soc_sst_ipc snd_soc_sst_dsp snd_soc_acpi_intel_match snd_soc_acpi snd_soc_core snd_hda_codec_realtek dell_rbtn snd_hda_codec_generic snd_compress snd_pcm_dmaengine ac97_bus x86_pkg_temp_thermal intel_powerclamp snd_hda_intel coretemp snd_intel_dspcfg iTCO_wdt snd_intel_sdw_acpi intel_pmc_bxt dell_laptop ee1004 iTCO_vendor_support iwlmvm ledtrig_audio kvm_intel snd_hda_codec mei_hdcp mei_wdt intel_rapl_msr dell_smm_hwmon mac80211 kvm snd_hda_core snd_hwdep snd_seq libarc4 snd_seq_device irqbypass rapl btusb intel_cstate btrtl intel_uncore iwlwifi snd_pcm uvcvideo dell_wmi btbcm dell_smbios btintel i2c_i801 dcdbas snd_timer videobuf2_vmalloc snd dell_wmi_sysman videobuf2_memops
 dell_wmi_descriptor wmi_bmof intel_wmi_thunderbolt bluetooth soundcore i2c_smbus thunderbolt videobuf2_v4l2 ecdh_generic cfg80211 videobuf2_common ecc processor_thermal_device processor_thermal_rfim joydev processor_thermal_mbox ucsi_acpi processor_thermal_rapl mei_me typec_ucsi intel_rapl_common mei rfkill idma64 intel_pch_thermal intel_soc_dts_iosf typec int3403_thermal int340x_thermal_zone dell_smo8800 intel_hid acpi_pad int3400_thermal sparse_keymap acpi_thermal_rel zram ip_tables xfs dm_crypt trusted hid_multitouch i915 rtsx_pci_sdmmc mmc_core crct10dif_pclmul crc32_pclmul crc32c_intel ghash_clmulni_intel i2c_algo_bit drm_kms_helper nvme cec serio_raw rtsx_pci nvme_core drm e1000e i2c_hid_acpi wmi i2c_hid video pinctrl_cannonlake fuse videodev mc
CPU: 8 PID: 1732 Comm: rngd Not tainted 5.12.5-200.fc33.x86_64 #1
Hardware name: Dell Inc. Latitude 5511/0C33CM, BIOS 1.4.3 12/23/2020
RIP: 0010:tpm_tis_status+0x66/0x70
Code: 23 75 05 48 83 c4 10 c3 31 c0 80 3d 2a 55 55 01 00 75 f0 48 c7 c7 74 1e 44 af 88 44 24 07 c6 05 16 55 55 01 01 e8 dd 07 3d 00 <0f> 0b 0f b6 44 24 07 eb d0 90 0f 1f 44 00 00 41 57 41 56 41 55 41
RSP: 0018:ffffb43bc1157cd0 EFLAGS: 00010286
RAX: 000000000000001b RBX: ffff8b40483fd000 RCX: ffff8b479d6185c8
RDX: 00000000ffffffd8 RSI: 0000000000000027 RDI: ffff8b479d6185c0
RBP: ffff8b40483fd000 R08: 0000000000000000 R09: ffffb43bc1157b00
R10: ffffb43bc1157af8 R11: ffffffffafb45f28 R12: ffff8b40484e33e8
R13: ffff8b4080d94000 R14: 0000000000000000 R15: ffffb43bc1157d8a
FS:  00007fe7e8dea840(0000) GS:ffff8b479d600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fe7e6d1d3b4 CR3: 0000000142f3a002 CR4: 00000000007706e0
PKRU: 55555554
Call Trace:
 tpm_tis_send_data+0x2b/0x230
 tpm_tis_send_main+0x1e/0xe0
 ? proc_dostring_coredump+0x80/0x80
 tpm_transmit+0xd8/0x3d0
 tpm_transmit_cmd+0x25/0x90
 tpm2_get_random+0xd7/0x1d0
 ? tpm_chip_start+0x6a/0xb0
 tpm_get_random+0x5b/0x70
 rng_dev_read+0x1c0/0x2b0
 vfs_read+0xab/0x1a0
 ksys_read+0x4f/0xc0
 do_syscall_64+0x33/0x40
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7fe7e960c0cc
Code: ec 28 48 89 54 24 18 48 89 74 24 10 89 7c 24 08 e8 19 fc ff ff 48 8b 54 24 18 48 8b 74 24 10 41 89 c0 8b 7c 24 08 31 c0 0f 05 <48> 3d 00 f0 ff ff 77 34 44 89 c7 48 89 44 24 08 e8 6f fc ff ff 48
RSP: 002b:00007ffc0b558cc0 EFLAGS: 00000246 ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: 00000000000009c4 RCX: 00007fe7e960c0cc
RDX: 00000000000009c4 RSI: 00007ffc0b558d40 RDI: 0000000000000003
RBP: 00007ffc0b558d40 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000008 R11: 0000000000000246 R12: 000055ebcf2cb760
R13: 0000000000000000 R14: 00007ffc0b558d40 R15: 000055ebcf2cb760