Backtrace

WARNING: CPU: 11 PID: 841 at drivers/char/tpm/tpm_tis_core.c:249 tpm_tis_status+0x66/0x70
Modules linked in: acpi_cpufreq(-) bnep sunrpc snd_hda_codec_hdmi snd_sof_pci hid_logitech_hidpp x86_pkg_temp_thermal intel_powerclamp snd_sof_intel_byt snd_sof_intel_hda_common coretemp snd_soc_hdac_hda vfat snd_sof_intel_hda iTCO_wdt snd_sof_intel_ipc snd_sof ee1004 intel_pmc_bxt iTCO_vendor_support fat kvm_intel snd_hda_codec_realtek snd_sof_xtensa_dsp dell_laptop mei_hdcp snd_hda_codec_generic intel_rapl_msr dell_smm_hwmon ledtrig_audio snd_soc_skl kvm irqbypass snd_soc_sst_ipc rapl snd_soc_sst_dsp snd_hda_ext_core snd_soc_acpi_intel_match snd_soc_acpi snd_hda_intel snd_intel_dspcfg soundwire_intel iwlmvm soundwire_generic_allocation snd_soc_core snd_compress snd_pcm_dmaengine soundwire_cadence mac80211 snd_hda_codec snd_hda_core ac97_bus snd_hwdep snd_seq snd_seq_device snd_pcm intel_cstate dell_wmi intel_uncore libarc4 dell_smbios uvcvideo snd_timer dcdbas btusb snd videobuf2_vmalloc pcspkr videobuf2_memops btrtl i2c_i801 videobuf2_v4l2 btbcm nvidia_drm(POE)
 dell_wmi_descriptor wmi_bmof intel_wmi_thunderbolt iwlwifi i2c_smbus soundcore videobuf2_common nvidia_modeset(POE) btintel mei_me thunderbolt cfg80211 bluetooth mei videodev joydev hid_sensor_als hid_sensor_trigger hid_sensor_iio_common industrialio_triggered_buffer ecdh_generic kfifo_buf hid_logitech_dj mc nvidia(POE) idma64 industrialio ecc rfkill processor_thermal_device ucsi_acpi intel_pch_thermal intel_rapl_common typec_ucsi intel_soc_dts_iosf typec int3403_thermal int340x_thermal_zone intel_hid int3400_thermal acpi_thermal_rel sparse_keymap acpi_tad acpi_pad zram ip_tables r8152 mii uas usb_storage hid_sensor_hub intel_ishtp_loader intel_ishtp_hid i915 hid_multitouch i2c_algo_bit drm_kms_helper cec rtsx_pci_sdmmc crct10dif_pclmul mmc_core crc32_pclmul crc32c_intel drm ghash_clmulni_intel serio_raw nvme intel_ish_ipc nvme_core intel_ishtp i2c_hid rtsx_pci wmi pinctrl_cannonlake video fuse
CPU: 11 PID: 841 Comm: rngd Tainted: P        W  OE     5.10.13-200.fc33.x86_64 #1
Hardware name: Dell Inc. XPS 15 9500/05XYW7, BIOS 1.6.1 12/24/2020
RIP: 0010:tpm_tis_status+0x66/0x70
Code: 23 75 05 48 83 c4 10 c3 31 c0 80 3d b0 e0 56 01 00 75 f0 48 c7 c7 34 38 43 9d 88 44 24 07 c6 05 9c e0 56 01 01 e8 7b 03 3c 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:ffffb608c139bcd0 EFLAGS: 00010286
RAX: 000000000000001b RBX: ffff8de007c6c000 RCX: ffff8de37d6d8a88
RDX: 00000000ffffffd8 RSI: 0000000000000027 RDI: ffff8de37d6d8a80
RBP: ffff8de007c6c000 R08: 0000000000000000 R09: ffffb608c139bb00
R10: ffffb608c139baf8 R11: ffffffff9db44748 R12: ffff8de007c3aaa8
R13: ffff8de038c85000 R14: 0000000000000000 R15: ffffb608c139bd8a
FS:  00007f7bfb2a7840(0000) GS:ffff8de37d6c0000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f87b130a270 CR3: 0000000127d7a006 CR4: 00000000007706e0
PKRU: 55555554
Call Trace:
 tpm_tis_send_data+0x2b/0x230
 tpm_tis_send_main+0x1e/0xe0
 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+0x1b8/0x2c0
 vfs_read+0xab/0x1a0
 ksys_read+0x4f/0xc0
 do_syscall_64+0x33/0x40
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x7f7bfbb270fc
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:00007ffc9def2080 EFLAGS: 00000246 ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: 00000000000009c4 RCX: 00007f7bfbb270fc
RDX: 00000000000009c4 RSI: 00007ffc9def2100 RDI: 0000000000000003
RBP: 00007ffc9def2100 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000008 R11: 0000000000000246 R12: 000055f8559346c0
R13: 0000000000000000 R14: 00007ffc9def2100 R15: 000055f8559346f0