Package: src:linux Version: 4.18.6-1~bpo9+1 Severity: important Tags: upstream patch
Please see https://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace.git/commit/?h=for-linus - invalidating filesystems can cause dentry table corruption leading to busy loop in kernel. Easily triggered from userspace (observed triggers using NFS, XFS and ZFS). Patch supplied upstream; please consider cherrypicking this to BPO kernel. Thanks. -- Package-specific info: ** Version: Linux version 4.18.0-0.bpo.1-amd64 (debian-ker...@lists.debian.org) (gcc version 6.3.0 20170516 (Debian 6.3.0-18+deb9u1)) #1 SMP Debian 4.18.6-1~bpo9+1 (2018-09-13) ** Command line: BOOT_IMAGE=/boot@/boot/vmlinuz-4.18.0-0.bpo.1-amd64 root=ZFS=rpool/boot ro ** Tainted: PO (4097) * Proprietary module has been loaded. * Out-of-tree module has been loaded. ** Kernel log: Unable to read kernel log; any relevant messages should be attached ** Model information sys_vendor: product_name: product_version: chassis_vendor: chassis_version: bios_vendor: Intel Corporation bios_version: MYBDWi30.86A.0038.2016.0913.1446 board_vendor: Intel Corporation board_name: NUC5i3MYBE board_version: H47781-206 ** Loaded modules: xt_nat cfg80211 xt_tcpmss ipt_MASQUERADE xt_limit xt_recent ip6table_nat nf_nat_ipv6 ip6t_REJECT nf_reject_ipv6 ip6table_mangle ip6table_raw nf_conntrack_ipv6 nf_defrag_ipv6 nf_log_ipv6 ip6table_filter ip6_tables xt_comment iptable_nat nf_nat_ipv4 ipt_REJECT nf_reject_ipv4 xt_addrtype bridge xt_mark iptable_mangle xt_TCPMSS xt_tcpudp xt_CT iptable_raw xt_multiport nf_conntrack_ipv4 nf_defrag_ipv4 xt_conntrack xt_NFLOG xt_LOG nf_log_ipv4 nf_log_common nf_nat_tftp nf_nat_snmp_basic nf_conntrack_snmp nf_nat_sip nf_nat_pptp nf_nat_proto_gre nf_nat_irc nf_nat_h323 nf_nat_ftp nf_nat_amanda ts_kmp nf_conntrack_amanda nf_nat nf_conntrack_sane nf_conntrack_tftp nf_conntrack_sip nf_conntrack_pptp nf_conntrack_proto_gre nf_conntrack_netlink nf_conntrack_netbios_ns nf_conntrack_broadcast nf_conntrack_irc nf_conntrack_h323 nf_conntrack_ftp nf_conntrack libcrc32c crc32c_generic iptable_filter nfnetlink_queue nfnetlink_log nfnetlink bluetooth drbg ansi_cprng ecdh_generic rfkill crc16 pppoe pppox ppp_generic slhc binfmt_misc nls_ascii nls_cp437 vfat fat intel_rapl x86_pkg_temp_thermal intel_powerclamp coretemp kvm_intel iTCO_wdt iTCO_vendor_support evdev kvm i915 irqbypass crct10dif_pclmul crc32_pclmul pl2303 drm_kms_helper usbserial ghash_clmulni_intel sg drm intel_cstate mei_me mei intel_uncore lpc_ich pcspkr efi_pstore intel_rapl_perf efivars video button acpi_pad pcc_cpufreq bonding 8021q garp mrp stp llc efivarfs ip_tables x_tables autofs4 zfs(PO) zunicode(PO) zavl(PO) icp(PO) zcommon(PO) znvpair(PO) spl(O) sd_mod crc32c_intel ahci libahci libata igb i2c_algo_bit scsi_mod dca aesni_intel xhci_pci ehci_pci xhci_hcd ehci_hcd aes_x86_64 crypto_simd i2c_i801 cryptd glue_helper usbcore e1000e usb_common fan thermal ** PCI devices: not available ** USB devices: Bus 001 Device 002: ID 8087:8001 Intel Corp. Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 003 Device 002: ID 2109:0813 VIA Labs, Inc. Bus 003 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub Bus 002 Device 004: ID 0557:2008 ATEN International Co., Ltd UC-232A Serial Port [pl2303] Bus 002 Device 003: ID 067b:2303 Prolific Technology, Inc. PL2303 Serial Port Bus 002 Device 002: ID 2109:2813 VIA Labs, Inc. Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub -- System Information: Debian Release: 9.6 APT prefers stable APT policy: (700, 'stable'), (500, 'stable-updates') Architecture: amd64 (x86_64) Kernel: Linux 4.18.0-0.bpo.1-amd64 (SMP w/4 CPU cores) Locale: LANG=en_IE.UTF-8, LC_CTYPE=en_IE.UTF-8 (charmap=UTF-8), LANGUAGE=en_IE.UTF-8 (charmap=UTF-8) Shell: /bin/sh linked to /usr/bin/dash Init: systemd (via /run/systemd/system) Versions of packages linux-image-4.18.0-0.bpo.1-amd64 depends on: ii initramfs-tools [linux-initramfs-tool] 0.130 ii kmod 23-2 ii linux-base 4.5 Versions of packages linux-image-4.18.0-0.bpo.1-amd64 recommends: ii apparmor 2.11.0-3+deb9u2 ii firmware-linux-free 3.4 ii irqbalance 1.1.0-2.3 Versions of packages linux-image-4.18.0-0.bpo.1-amd64 suggests: pn debian-kernel-handbook <none> ii grub-efi-amd64 2.02~beta3-5+deb9u1 pn linux-doc-4.18 <none> Versions of packages linux-image-4.18.0-0.bpo.1-amd64 is related to: ii firmware-amd-graphics 20180825+dfsg-1~bpo9+1 pn firmware-atheros <none> pn firmware-bnx2 <none> pn firmware-bnx2x <none> pn firmware-brcm80211 <none> pn firmware-cavium <none> pn firmware-intel-sound <none> pn firmware-intelwimax <none> pn firmware-ipw2x00 <none> pn firmware-ivtv <none> pn firmware-iwlwifi <none> pn firmware-libertas <none> ii firmware-linux-nonfree 20180825+dfsg-1~bpo9+1 ii firmware-misc-nonfree 20180825+dfsg-1~bpo9+1 pn firmware-myricom <none> pn firmware-netxen <none> pn firmware-qlogic <none> pn firmware-realtek <none> pn firmware-samsung <none> pn firmware-siano <none> pn firmware-ti-connectivity <none> pn xen-hypervisor <none> -- no debconf information