[ 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 ]---
-- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1728771 Title: BUG: unable to handle kernel NULL pointer dereference at 0000000000000030 Status in Linux: Unknown Status in linux package in Ubuntu: Confirmed Bug description: Trying to 'cat' a file in an overlayfs. The file is in the lowerdir which is ecryptfs. I use the attached script to create directories and randomly distributed files. $HOME is ecryptfs. /tmp/ is tmpfs. $ pwd $HOME/Hacking/overlayfs/ $ ./build.sh $ sudo mount -t overlay overlay -o lowerdir=lower/1,upperdir=/tmp/upper/1,workdir=/tmp/workdir/1 overlay/1 $ grep /tmp /proc/mounts tmpfs /tmp tmpfs rw,nosuid,nodev,relatime 0 0 overlay /home/tj/Hacking/overlayfs/overlay/1 overlay rw,relatime,lowerdir=lower/1,upperdir=/tmp/upper/1,workdir=/tmp/workdir/1 0 0 $ ls lower/1/ 1b 1c 1d 1e 1f 1g 1k 1l 1o 1p 1q 1t 1u 1v 1w 1x 1y 1z $ ls /tmp/upper/1/ 1e 1i 1l 1n 1u $ ls overlay/1/ 1b 1c 1d 1e 1f 1g 1i 1k 1l 1n 1o 1p 1q 1t 1u 1v 1w 1x 1y 1z $ cat overlay/1/1b Killed $ uname -r 4.13.0-16-lowlatency $ lsb_release -a LSB Version: core-9.20160110ubuntu0.2-amd64:core-9.20160110ubuntu0.2-noarch:security-9.20160110ubuntu0.2-amd64:security-9.20160110ubuntu0.2-noarch Distributor ID: Ubuntu Description: Ubuntu 16.04.3 LTS Release: 16.04 Codename: xenial $ apt list linux-lowlatency-hwe-16.04-edge Listing... Done linux-lowlatency-hwe-16.04-edge/xenial-proposed,now 4.13.0.16.23 amd64 [installed] $ tail /var/log/kern.log Oct 31 03:11:09 hephaestion kernel: [ 1057.380604] BUG: unable to handle kernel NULL pointer dereference at 0000000000000030 Oct 31 03:11:09 hephaestion kernel: [ 1057.380668] IP: ecryptfs_privileged_open+0x51/0x180 Oct 31 03:11:09 hephaestion kernel: [ 1057.380686] PGD 20ee07067 Oct 31 03:11:09 hephaestion kernel: [ 1057.380688] P4D 20ee07067 Oct 31 03:11:09 hephaestion kernel: [ 1057.380700] PUD 20c455067 Oct 31 03:11:09 hephaestion kernel: [ 1057.380711] PMD 0 Oct 31 03:11:09 hephaestion kernel: [ 1057.380721] Oct 31 03:11:09 hephaestion kernel: [ 1057.380741] Oops: 0000 [#1] PREEMPT SMP Oct 31 03:11:09 hephaestion kernel: [ 1057.380755] Modules linked in: overlay hidp scsi_transport_iscsi veth ip6t_MASQUERADE nf_nat_masquerade_ipv6 ip6table_nat nf_conntrack_ipv6 nf_defrag_ipv6 nf_nat_ipv6 xt_comment xt_CHECKSUM iptable_mangle ipt_MASQUERADE nf_nat_masquerade_ipv4 iptable_nat nf_nat_ipv4 nf_nat nf_conntrack_ipv4 nf_defrag_ipv4 ccm xt_conntrack nf_conntrack ipt_REJECT nf_reject_ipv4 xt_tcpudp bridge ebtable_filter ebtables ip6table_filter ip6_tables iptable_filter ip_tables x_tables 8021q garp mrp stp llc rfcomm bnep binfmt_misc dm_thin_pool dm_persistent_data dm_bio_prison dm_bufio cdc_mbim cdc_wdm cdc_ncm usbnet cdc_acm mii gpio_ich dell_laptop coretemp btusb btrtl btbcm btintel joydev dell_wmi bluetooth dell_smbios dcdbas wmi_bmof sparse_keymap serio_raw ecdh_generic arc4 snd_hda_codec_idt snd_hda_codec_generic snd_hda_intel Oct 31 03:11:09 hephaestion kernel: [ 1057.381004] snd_hda_codec snd_hda_core input_leds snd_hwdep snd_pcm snd_seq_midi uvcvideo snd_seq_midi_event videobuf2_vmalloc videobuf2_memops snd_rawmidi videobuf2_v4l2 iwl4965 videobuf2_core iwlegacy videodev media mac80211 snd_seq r852 sm_common nand nand_ecc nand_bch bch mtd r592 memstick lpc_ich cfg80211 snd_seq_device snd_timer snd soundcore shpchp mac_hid kvm_intel kvm irqbypass parport_pc ppdev nfsd lp auth_rpcgss nfs_acl lockd grace parport sunrpc autofs4 crypto_simd glue_helper cryptd aes_x86_64 algif_skcipher af_alg dm_crypt raid10 raid456 async_raid6_recov async_memcpy async_pq async_xor async_tx xor raid6_pq libcrc32c raid1 raid0 multipath linear dm_mirror dm_region_hash dm_log hid_generic usbhid hid psmouse sky2 ahci nouveau libahci pata_acpi firewire_ohci sdhci_pci sdhci firewire_core Oct 31 03:11:09 hephaestion kernel: [ 1057.381012] crc_itu_t mxm_wmi i2c_algo_bit video ttm drm_kms_helper syscopyarea sysfillrect sysimgblt fb_sys_fops drm wmi Oct 31 03:11:09 hephaestion kernel: [ 1057.381012] CPU: 0 PID: 10087 Comm: cat Tainted: P OE 4.13.0-16-lowlatency #19~16.04.3-Ubuntu Oct 31 03:11:09 hephaestion kernel: [ 1057.381012] Hardware name: Dell Inc. XPS M1530 / , BIOS A12 11/19/2008 Oct 31 03:11:09 hephaestion kernel: [ 1057.381012] task: ffff8a1167050000 task.stack: ffffa10c010a8000 Oct 31 03:11:09 hephaestion kernel: [ 1057.381012] RIP: 0010:ecryptfs_privileged_open+0x51/0x180 Oct 31 03:11:09 hephaestion kernel: [ 1057.381012] RSP: 0018:ffffa10c010abb60 EFLAGS: 00010246 Oct 31 03:11:09 hephaestion kernel: [ 1057.381012] RAX: ffffa10c010abb88 RBX: ffff8a1167459540 RCX: ffff8a11677ced80 Oct 31 03:11:09 hephaestion kernel: [ 1057.381012] RDX: ffffffffbeefbe60 RSI: ffffffffbe6999fb RDI: ffffa10c010abb80 Oct 31 03:11:09 hephaestion kernel: [ 1057.381012] RBP: ffffa10c010abbd0 R08: ffffffffbdd68aa1 R09: ffff8a118a183800 Oct 31 03:11:09 hephaestion kernel: [ 1057.381012] R10: ffff8a113175d010 R11: ffff8a113175e278 R12: 0000000000000000 Oct 31 03:11:09 hephaestion kernel: [ 1057.381012] R13: ffff8a11677ced80 R14: 0000000000000000 R15: ffff8a11cd431710 Oct 31 03:11:09 hephaestion kernel: [ 1057.381012] FS: 00007f80f7700700(0000) GS:ffff8a11dfc00000(0000) knlGS:0000000000000000 Oct 31 03:11:09 hephaestion kernel: [ 1057.381012] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 Oct 31 03:11:09 hephaestion kernel: [ 1057.381012] CR2: 0000000000000030 CR3: 000000020d763000 CR4: 00000000000006f0 Oct 31 03:11:09 hephaestion kernel: [ 1057.381012] Call Trace: Oct 31 03:11:09 hephaestion kernel: [ 1057.381012] ecryptfs_get_lower_file+0x7d/0xc0 Oct 31 03:11:09 hephaestion kernel: [ 1057.381012] ecryptfs_open+0x71/0x200 Oct 31 03:11:09 hephaestion kernel: [ 1057.381012] do_dentry_open+0x1f8/0x320 Oct 31 03:11:09 hephaestion kernel: [ 1057.381012] ? ecryptfs_release+0x30/0x30 Oct 31 03:11:09 hephaestion kernel: [ 1057.381012] vfs_open+0x4e/0x80 Oct 31 03:11:09 hephaestion kernel: [ 1057.381012] path_openat+0x2a8/0x13c0 Oct 31 03:11:09 hephaestion kernel: [ 1057.381012] ? unlock_page_memcg+0x12/0x20 Oct 31 03:11:09 hephaestion kernel: [ 1057.381012] ? page_add_file_rmap+0x58/0x170 Oct 31 03:11:09 hephaestion kernel: [ 1057.381012] do_filp_open+0x99/0x110 Oct 31 03:11:09 hephaestion kernel: [ 1057.381012] ? cp_new_stat+0x156/0x190 Oct 31 03:11:09 hephaestion kernel: [ 1057.381012] ? __check_object_size+0xfc/0x1a0 Oct 31 03:11:09 hephaestion kernel: [ 1057.381012] ? __alloc_fd+0xae/0x170 Oct 31 03:11:09 hephaestion kernel: [ 1057.381012] do_sys_open+0x12d/0x2a0 Oct 31 03:11:09 hephaestion kernel: [ 1057.381012] ? do_sys_open+0x12d/0x2a0 Oct 31 03:11:09 hephaestion kernel: [ 1057.381012] SyS_open+0x1e/0x20 Oct 31 03:11:09 hephaestion kernel: [ 1057.381012] entry_SYSCALL_64_fastpath+0x1e/0xa9 Oct 31 03:11:09 hephaestion kernel: [ 1057.381012] RIP: 0033:0x7f80f7245010 Oct 31 03:11:09 hephaestion kernel: [ 1057.381012] RSP: 002b:00007fff0583f8d8 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 Oct 31 03:11:09 hephaestion kernel: [ 1057.381012] RAX: ffffffffffffffda RBX: 00007fff0583fb38 RCX: 00007f80f7245010 Oct 31 03:11:09 hephaestion kernel: [ 1057.381012] RDX: 0000000000020000 RSI: 0000000000000000 RDI: 00007fff05840237 Oct 31 03:11:09 hephaestion kernel: [ 1057.381012] RBP: 0000000000001000 R08: 0000000000000000 R09: 0000000000000000 Oct 31 03:11:09 hephaestion kernel: [ 1057.381012] R10: 000000000000069d R11: 0000000000000246 R12: 00000000004025b0 Oct 31 03:11:09 hephaestion kernel: [ 1057.381012] R13: 00007fff0583fb30 R14: 0000000000000000 R15: 0000000000000000 Oct 31 03:11:09 hephaestion kernel: [ 1057.381012] Code: c2 60 be ef be 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 1f 91 d5 ff <49> 8b 44 24 30 48 89 5d 90 4c 89 65 a0 4c 89 75 98 48 8b 40 28 Oct 31 03:11:09 hephaestion kernel: [ 1057.381012] RIP: ecryptfs_privileged_open+0x51/0x180 RSP: ffffa10c010abb60 Oct 31 03:11:09 hephaestion kernel: [ 1057.381012] CR2: 0000000000000030 Oct 31 03:11:09 hephaestion kernel: [ 1057.391461] ---[ end trace 1d38ad38c6419426 ]--- To manage notifications about this bug go to: https://bugs.launchpad.net/linux/+bug/1728771/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
