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To:     Linus Torvalds <torvalds@linux-foundation.org>,
        Takashi Iwai <tiwai@suse.com>
Cc:     Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
        skhan@linuxfoundation.org
From:   Shuah Khan <skhan@linuxfoundation.org>
Subject: Linux 5.8-rc1 BUG unable to handle page fault (snd_pcm)
Message-ID: <446c7a14-db97-6389-a03c-9ffccd251529@linuxfoundation.org>
Date:   Mon, 15 Jun 2020 12:48:11 -0600
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I am seeing the following problem on my system. I haven't started debug
yet. Is this a known issue?

[    9.791309] BUG: unable to handle page fault for address: 
ffffb1e78165d000
[    9.791328] #PF: supervisor write access in kernel mode
[    9.791330] #PF: error_code(0x000b) - reserved bit violation
[    9.791332] PGD 23dd5c067 P4D 23dd5c067 PUD 23dd5d067 PMD 22ba8e067 
PTE 80001a3681509163
[    9.791337] Oops: 000b [#1] SMP NOPTI
[    9.791340] CPU: 7 PID: 866 Comm: pulseaudio Not tainted 5.8.0-rc1 #1
[    9.791341] Hardware name: LENOVO 10VGCTO1WW/3130, BIOS M1XKT45A 
08/21/2019
[    9.791346] RIP: 0010:__memset+0x24/0x30
[    9.791348] Code: cc cc cc cc cc cc 0f 1f 44 00 00 49 89 f9 48 89 d1 
83 e2 07 48 c1 e9 03 40 0f b6 f6 48 b8 01 01 01 01 01 01 01 01 48 0f af 
c6 <f3> 48 ab 89 d1 f3 aa 4c 89 c8 c3 90 49 89 f9 40 88 f0 48 89 d1 f3
[    9.791350] RSP: 0018:ffffb1e7817a7dd0 EFLAGS: 00010216
[    9.791352] RAX: 0000000000000000 RBX: ffff97b32dfd7400 RCX: 
00000000000008a0
[    9.791354] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 
ffffb1e78165d000
[    9.791356] RBP: ffffb1e7817a7e00 R08: ffffb1e780000000 R09: 
ffffb1e78165d000
[    9.791358] R10: ffffffffffffffff R11: ffffb1e78165d000 R12: 
0000000000000000
[    9.791359] R13: ffff97b32dfd3000 R14: ffffffffc0b48880 R15: 
ffff97b33aa42600
[    9.791361] FS:  00007fa11cb34ec0(0000) GS:ffff97b33edc0000(0000) 
knlGS:0000000000000000
[    9.791363] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    9.791365] CR2: ffffb1e78165d000 CR3: 0000000210db6000 CR4: 
00000000003406e0
[    9.791367] Call Trace:
[    9.791377]  ? snd_pcm_hw_params+0x3ca/0x440 [snd_pcm]
[    9.791383]  snd_pcm_common_ioctl+0x173/0xf20 [snd_pcm]
[    9.791389]  ? snd_ctl_ioctl+0x1c5/0x710 [snd]
[    9.791394]  snd_pcm_ioctl+0x27/0x40 [snd_pcm]
[    9.791398]  ksys_ioctl+0x9d/0xd0
[    9.791400]  __x64_sys_ioctl+0x1a/0x20
[    9.791404]  do_syscall_64+0x49/0xc0
[    9.791406]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
[    9.791408] RIP: 0033:0x7fa11d4c137b
[    9.791410] Code: Bad RIP value.
[    9.791412] RSP: 002b:00007ffe2fb4e308 EFLAGS: 00000246 ORIG_RAX: 
0000000000000010
[    9.791414] RAX: ffffffffffffffda RBX: 00007ffe2fb4e510 RCX: 
00007fa11d4c137b
[    9.791415] RDX: 00007ffe2fb4e510 RSI: 00000000c2604111 RDI: 
0000000000000012
[    9.791417] RBP: 000055e99f65a890 R08: 0000000000000000 R09: 
0000000000000000
[    9.791418] R10: 0000000000000004 R11: 0000000000000246 R12: 
000055e99f65a810
[    9.791420] R13: 00007ffe2fb4e344 R14: 0000000000000000 R15: 
00007ffe2fb4e510
[    9.791422] Modules linked in: cmac algif_hash algif_skcipher af_alg 
bnep binfmt_misc nls_iso8859_1 snd_hda_codec_realtek 
snd_hda_codec_generic ledtrig_audio snd_hda_codec_hdmi snd_hda_intel 
snd_usb_audio snd_intel_dspcfg snd_usbmidi_lib snd_hda_codec amdgpu mc 
snd_hda_core snd_hwdep snd_pcm edac_mce_amd iommu_v2 ath10k_pci 
snd_seq_midi gpu_sched snd_seq_midi_event kvm_amd kvm ttm snd_rawmidi 
ath10k_core irqbypass drm_kms_helper snd_seq cec i2c_algo_bit 
fb_sys_fops ath snd_seq_device syscopyarea snd_timer mac80211 
crct10dif_pclmul ghash_clmulni_intel btusb aesni_intel btrtl btbcm 
crypto_simd cryptd btintel serio_raw input_leds sysfillrect glue_helper 
bluetooth efi_pstore k10temp snd pl2303 wmi_bmof ecdh_generic ecc 
snd_pci_acp3x sysimgblt cfg80211 soundcore ccp libarc4 ipmi_devintf 
ipmi_msghandler mac_hid sch_fq_codel parport_pc ppdev lp parport drm 
ip_tables x_tables autofs4 hid_generic usbhid hid crc32_pclmul nvme ahci 
psmouse i2c_piix4 libahci nvme_core r8169 realtek wmi video
[    9.791463] CR2: ffffb1e78165d000
[    9.791465] ---[ end trace 7b22a028ccaf2e75 ]---

thanks,
-- Shuah