Comment 6 for bug 1728771

[ 2273.365506] BUG: unable to handle kernel NULL pointer dereference at 0000000000000030
[ 2273.365512] IP: ecryptfs_privileged_open+0x51/0x180
[ 2273.365513] PGD 0 P4D 0
[ 2273.365515] Oops: 0000 [#1] SMP PTI
[ 2273.365516] Modules linked in: ccm ipt_MASQUERADE nf_nat_masquerade_ipv4 nf_conntrack_netlink nfnetlink xfrm_user xfrm_algo iptable_nat nf_conntrack_ipv4 nf_defrag_ipv4 nf_nat_ipv4 xt_addrtype iptable_filter xt_conntrack nf_nat nf_conntrack br_netfilter bridge stp llc overlay pci_stub vboxpci(OE) vboxnetadp(OE) vboxnetflt(OE) vboxdrv(OE) bnep dm_crypt binfmt_misc nls_iso8859_1 arc4 intel_rapl x86_pkg_temp_thermal intel_powerclamp coretemp kvm_intel snd_hda_codec_hdmi kvm irqbypass uvcvideo crct10dif_pclmul videobuf2_vmalloc snd_hda_codec_realtek crc32_pclmul videobuf2_memops ghash_clmulni_intel snd_hda_codec_generic videobuf2_v4l2 videobuf2_core pcbc videodev media btusb btrtl snd_seq_midi btbcm btintel iwlmvm aesni_intel bluetooth snd_hda_intel snd_seq_midi_event mac80211 aes_x86_64 ecdh_generic
[ 2273.365541] crypto_simd glue_helper snd_hda_codec snd_rawmidi cryptd snd_hda_core intel_cstate intel_rapl_perf snd_hwdep iwlwifi snd_pcm cfg80211 snd_seq rtsx_pci_ms idma64 joydev memstick virt_dma input_leds wmi_bmof thinkpad_acpi intel_wmi_thunderbolt serio_raw mei_me intel_lpss_pci snd_seq_device mei intel_pch_thermal intel_lpss nvram shpchp snd_timer snd soundcore mac_hid acpi_pad tpm_crb sch_fq_codel parport_pc ppdev sunrpc lp parport ip_tables x_tables autofs4 btrfs zstd_compress raid10 raid456 async_raid6_recov async_memcpy async_pq async_xor async_tx xor raid6_pq libcrc32c raid1 raid0 multipath linear nouveau i915 mxm_wmi ttm i2c_algo_bit drm_kms_helper e1000e syscopyarea sysfillrect sysimgblt rtsx_pci_sdmmc psmouse ptp fb_sys_fops pps_core nvme drm rtsx_pci nvme_core wmi i2c_hid video hid
[ 2273.365571] pinctrl_sunrisepoint
[ 2273.365573] CPU: 6 PID: 29901 Comm: action-suid Tainted: G OE 4.15.0-22-generic #24-Ubuntu
[ 2273.365574] Hardware name: LENOVO 20HH000AUS/20HH000AUS, BIOS N1UET46W (1.20 ) 02/26/2018
[ 2273.365576] RIP: 0010:ecryptfs_privileged_open+0x51/0x180
[ 2273.365577] RSP: 0018:ffffb33145e2bb48 EFLAGS: 00010246
[ 2273.365578] RAX: ffffb33145e2bb70 RBX: ffff948a0f48fe88 RCX: ffff948bf02eb780
[ 2273.365579] RDX: ffffffff926e4b40 RSI: ffffffff91cc2d53 RDI: ffffb33145e2bb68
[ 2273.365580] RBP: ffffb33145e2bbb8 R08: ffff948c405a7060 R09: ffff948aa2ca1ab0
[ 2273.365581] R10: 0000007374736f68 R11: 0000000000000005 R12: 0000000000000000
[ 2273.365582] R13: ffff948bf02eb780 R14: 0000000000000000 R15: ffff948b67ff7200
[ 2273.365583] FS: 00007f13be06d580(0000) GS:ffff948c40580000(0000) knlGS:0000000000000000
[ 2273.365584] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 2273.365585] CR2: 0000000000000030 CR3: 000000026c512001 CR4: 00000000003606e0
[ 2273.365586] Call Trace:
[ 2273.365589] ecryptfs_get_lower_file+0x7d/0xc0
[ 2273.365591] ecryptfs_open+0x71/0x200
[ 2273.365593] do_dentry_open+0x1c2/0x310
[ 2273.365594] ? ecryptfs_flush+0x50/0x50
[ 2273.365596] vfs_open+0x4f/0x80
[ 2273.365598] path_openat+0x66e/0x1770
[ 2273.365599] ? filename_lookup+0xf2/0x190
[ 2273.365602] do_filp_open+0x9b/0x110
[ 2273.365604] ? __check_object_size+0xaf/0x1b0
[ 2273.365606] ? __alloc_fd+0x46/0x170
[ 2273.365607] do_sys_open+0x1bb/0x2c0
[ 2273.365609] ? do_sys_open+0x1bb/0x2c0
[ 2273.365611] SyS_openat+0x14/0x20
[ 2273.365613] do_syscall_64+0x73/0x130
[ 2273.365615] entry_SYSCALL_64_after_hwframe+0x3d/0xa2
[ 2273.365616] RIP: 0033:0x7f13bdba5c8e
[ 2273.365617] RSP: 002b:00007ffc7ffa7d00 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
[ 2273.365618] RAX: ffffffffffffffda RBX: 0000000000005006 RCX: 00007f13bdba5c8e
[ 2273.365619] RDX: 0000000000000000 RSI: 000055dec5346190 RDI: 00000000ffffff9c
[ 2273.365620] RBP: 000055dec5346190 R08: 0000000000000000 R09: 0000000000000009
[ 2273.365621] R10: 0000000000000000 R11: 0000000000000246 R12: 000055dec533cb70
[ 2273.365622] R13: 00000000ffffffff R14: 000055dec5346190 R15: 0000000000000000
[ 2273.365623] Code: c2 40 4b 6e 92 49 89 cd 65 48 8b 04 25 28 00 00 00 48 89 45 d8 31 c0 48 8d 45 90 c7 45 a8 00 00 00 00 48 8d 78 20 e8 3f 23 d4 ff <49> 8b 44 24 30 48 89 5d 90 4c 89 65 a0 4c 89 75 98 48 8b 40 28
[ 2273.365642] RIP: ecryptfs_privileged_open+0x51/0x180 RSP: ffffb33145e2bb48
[ 2273.365643] CR2: 0000000000000030
[ 2273.365645] ---[ end trace e3ba314809fc3c25 ]---