[openSUSE-SU-2021:3941-1] Security update for the Linux Kernel

The SUSE Linux Enterprise 15 SP3 kernel was updated to receive various security and bugfixes.

The following security bugs were fixed:

• Unprivileged BPF has been disabled by default to reduce attack surface as too many security issues have happened in the past (jsc#SLE-22573)

  You can reenable via systemctl setting /proc/sys/kernel/unprivileged_bpf_disabled to 0. (kernel.unprivileged_bpf_disabled = 0)

• CVE-2021-0941: In bpf_skb_change_head of filter.c, there is a possible out of bounds read due to a use after free. This could lead to local escalation of privilege with System execution privileges needed. User interaction is not needed for exploitation (bnc#1192045 ).

• CVE-2021-31916: An out-of-bounds (OOB) memory write flaw was found in list_devices in drivers/md/dm-ioctl.c in the Multi-device driver module in the Linux kernel A bound check failure allowed an attacker with special user (CAP_SYS_ADMIN) privilege to gain access to out-of-bounds memory leading to a system crash or a leak of internal kernel information. The highest threat from this vulnerability is to system availability (bnc#1192781).

• CVE-2021-20322: Make the ipv4 and ipv6 ICMP exception caches less predictive to avoid information leaks about UDP ports in use. (bsc#1191790)

• CVE-2021-34981: Fixed file refcounting in cmtp when cmtp_attach_device fails (bsc#1191961).

The following non-security bugs were fixed:

• ABI: sysfs-kernel-slab: Document some stats (git-fixes).
• ALSA: hda: fix general protection fault in azx_runtime_idle (git-fixes).
• ALSA: hda: Free card instance properly at probe errors (git-fixes).
• ALSA: usb-audio: Add Audient iD14 to mixer map quirk table (git-fixes).
• ALSA: usb-audio: Add minimal-mute notion in dB mapping table (bsc#1192375).
• ALSA: usb-audio: Add Schiit Hel device to mixer map quirk table (git-fixes).
• ALSA: usb-audio: Fix dB level of Bose Revolve+ SoundLink (bsc#1192375).
• ALSA: usb-audio: Use int for dB map values (bsc#1192375).
• ARM: socfpga: Fix crash with CONFIG_FORTIRY_SOURCE (bsc#1192473).
• auxdisplay: ht16k33: Connect backlight to fbdev (git-fixes).
• auxdisplay: ht16k33: Fix frame buffer device blanking (git-fixes).
• auxdisplay: img-ascii-lcd: Fix lock-up when displaying empty string (git-fixes).
• bpf: Add kconfig knob for disabling unpriv bpf by default (jsc#SLE-22573)
• bpf: Add kconfig knob for disabling unpriv bpf by default (jsc#SLE-22574)
• bpf: Disallow unprivileged bpf by default (jsc#SLE-22573).
• bpf: Disallow unprivileged bpf by default (jsc#SLE-22574).
• bpf: Fix BPF_JIT kconfig symbol dependency (git-fixes jsc#SLE-22574).
• bpf: Fix potential race in tail call compatibility check (git-fixes).
• bpf, kconfig: Add consolidated menu entry for bpf with core options (jsc#SLE-22574).
• btrfs: block-group: Rework documentation of check_system_chunk function (bsc#1192896).
• btrfs: fix deadlock between chunk allocation and chunk btree modifications (bsc#1192896).
• btrfs: fix memory ordering between normal and ordered work functions (git-fixes).
• btrfs: update comments for chunk allocation -ENOSPC cases (bsc#1192896).
• cgroup/cpuset: Change references of cpuset_mutex to cpuset_rwsem (git-fixes).
• config: disable unprivileged BPF by default (jsc#SLE-22573) Backport of mainline commit 8a03e56b253e ('bpf: Disallow unprivileged bpf by default') only changes kconfig default, used e.g. for 'make oldconfig' when the config option is missing, but does not update our kernel configs used for build. Update also these to make sure unprivileged BPF is really disabled by default.
• crypto: caam - disable pkc for non-E SoCs (git-fixes).
• crypto: qat - detect PFVF collision after ACK (git-fixes).
• crypto: qat - disregard spurious PFVF interrupts (git-fixes).
• drm/i915: Introduce intel_hpd_hotplug_irqs() (bsc#1192758).
• drm: prevent spectre issue in vmw_execbuf_ioctl (bsc#1192802).
• EDAC/sb_edac: Fix top-of-high-memory value for Broadwell/Haswell (bsc#1152489).
• Eradicate Patch-mainline: No The pre-commit check can reject this deprecated tag then.
• exfat: fix erroneous discard when clear cluster bit (git-fixes).
• exfat: handle wrong stream entry size in exfat_readdir() (git-fixes).
• exfat: properly set s_time_gran (bsc#1192328).
• exfat: truncate atimes to 2s granularity (bsc#1192328).
• Fix problem with missing installkernel on Tumbleweed.
• fuse: fix page stealing (bsc#1192718).
• gpio: mpc8xxx: Use 'devm_gpiochip_add_data()' to simplify the code and avoid a leak (git-fixes).
• gpio/rockchip: add driver for rockchip gpio (bsc#1192217).
• gpio/rockchip: drop irq_gc_lock/irq_gc_unlock for irq set type (bsc#1192217).
• gpio/rockchip: extended debounce support is only available on v2 (bsc#1192217).
• gpio/rockchip: fetch deferred output settings on probe (bsc#1192217).
• gpio/rockchip: fix get_direction value handling (bsc#1192217).
• gpio/rockchip: support next version gpio controller (bsc#1192217).
• gpio/rockchip: use struct rockchip_gpio_regs for gpio controller (bsc#1192217).
• HID: u2fzero: clarify error check and length calculations (git-fixes).
• HID: u2fzero: properly handle timeouts in usb_submit_urb (git-fixes).
• ibmvnic: check failover_pending in login response (bsc#1190523 ltc#194510).
• ibmvnic: do not stop queue in xmit (bsc#1192273 ltc#194629).
• ibmvnic: Process crqs after enabling interrupts (bsc#1192273 ltc#194629).
• iio: dac: ad5446: Fix ad5622_write() return value (git-fixes).
• Input: elantench - fix misreporting trackpoint coordinates (bsc#1192918).
• kernel-*-subpackage: Add dependency on kernel scriptlets (bsc#1192740).
• mm/hugetlb: initialize hugetlb_usage in mm_init (bsc#1192906).
• Move upstreamed sound fix into sorted section
• net: dsa: felix: re-enable TX flow control in ocelot_port_flush() (git-fixes).
• net: mscc: ocelot: fix hardware timestamp dequeue logic.
• net: mscc: ocelot: warn when a PTP IRQ is raised for an unknown skb (git-fixes).
• net/smc: Correct smc link connection counter in case of smc client (git-fixes).
• net/smc: fix 'workqueue leaked lock' in smc_conn_abort_work (git-fixes).
• ocfs2: do not zero pages beyond i_size (bsc#1190795).
• ocfs2: fix data corruption on truncate (bsc#1190795).
• PCI: aardvark: Do not clear status bits of masked interrupts (git-fixes).
• PCI: aardvark: Do not spam about PIO Response Status (git-fixes).
• PCI: aardvark: Do not unmask unused interrupts (git-fixes).
• PCI: aardvark: Fix checking for link up via LTSSM state (git-fixes).
• PCI: aardvark: Fix reporting Data Link Layer Link Active (git-fixes).
• PCI: aardvark: Fix return value of MSI domain .alloc() method (git-fixes).
• PCI: aardvark: Read all 16-bits from PCIE_MSI_PAYLOAD_REG (git-fixes).
• PCI/ACPI: Check for _OSC support in acpi_pci_osc_control_set() (bsc#1169263).
• PCI/ACPI: Clarify message about _OSC failure (bsc#1169263).
• PCI/ACPI: Move _OSC query checks to separate function (bsc#1169263).
• PCI/ACPI: Move supported and control calculations to separate functions (bsc#1169263).
• PCI/ACPI: Remove OSC_PCI_SUPPORT_MASKS and OSC_PCI_CONTROL_MASKS (bsc#1169263).
• PCI/ACPI: Remove unnecessary osc_lock (bsc#1169263).
• PCI: pci-bridge-emul: Fix emulation of W1C bits (git-fixes).
• PCI: uniphier: Serialize INTx masking/unmasking and fix the bit operation (git-fixes).
• pinctrl: core: fix possible memory leak in pinctrl_enable() (git-fixes).
• pinctrl: pinctrl-rockchip: Fix a bunch of kerneldoc misdemeanours (bsc#1192217).
• pinctrl/rockchip: add a queue for deferred pin output settings on probe (bsc#1192217).
• pinctrl/rockchip: add pinctrl device to gpio bank struct (bsc#1192217).
• pinctrl: rockchip: add rk3308 SoC support (bsc#1192217).
• pinctrl: rockchip: add support for rk3568 (bsc#1192217).
• pinctrl/rockchip: always enable clock for gpio controller (bsc#1192217).
• pinctrl: rockchip: clear int status when driver probed (bsc#1192217).
• pinctrl: rockchip: create irq mapping in gpio_to_irq (bsc#1192217).
• pinctrl: rockchip: do coding style for mux route struct (bsc#1192217).
• pinctrl/rockchip: drop the gpio related codes (bsc#1192217).
• pinctrl: rockchip: enable gpio pclk for rockchip_gpio_to_irq (bsc#1192217).
• pinctrl: rockchip: make driver be tristate module (bsc#1192217).
• pinctrl: rockchip: Replace HTTP links with HTTPS ones (bsc#1192217).
• pinctrl: rockchip: return ENOMEM instead of EINVAL if allocation fails (bsc#1192217).
• pinctrl/rockchip: separate struct rockchip_pin_bank to a head file (bsc#1192217).
• power: supply: bq27xxx: Fix kernel crash on IRQ handler register error (git-fixes).
• power: supply: max17042_battery: Prevent int underflow in set_soc_threshold (git-fixes).
• power: supply: max17042_battery: use VFSOC for capacity when no rsns (git-fixes).
• power: supply: rt5033-battery: Change voltage values to 5V (git-fixes).
• printk/console: Allow to disable console output by using console='' or console=null (bsc#1192753).
• printk: handle blank console arguments passed in (bsc#1192753).
• qtnfmac: fix potential Spectre vulnerabilities (bsc#1192802).
• r8152: add a helper function about setting EEE (git-fixes).
• r8152: Add macpassthru support for ThinkPad Thunderbolt 3 Dock Gen 2 (git-fixes).
• r8152: Disable PLA MCU clock speed down (git-fixes).
• r8152: disable U2P3 for RTL8153B (git-fixes).
• r8152: divide the tx and rx bottom functions (git-fixes).
• r8152: do not enable U1U2 with USB_SPEED_HIGH for RTL8153B (git-fixes).
• r8152: fix runtime resume for linking change (git-fixes).
• r8152: replace array with linking list for rx information (git-fixes).
• r8152: reset flow control patch when linking on for RTL8153B (git-fixes).
• r8152: saving the settings of EEE (git-fixes).
• r8152: separate the rx buffer size (git-fixes).
• r8152: use alloc_pages for rx buffer (git-fixes).
• random: fix crash on multiple early calls to add_bootloader_randomness() (bsc#1184924)
• Revert 'ibmvnic: check failover_pending in login response' (bsc#1190523 ltc#194510).
• Revert 'platform/x86: i2c-multi-instantiate: Do not create platform device for INT3515 ACPI nodes' (git-fixes).
• Revert 'r8152: adjust the settings about MAC clock speed down for RTL8153' (git-fixes).
• Revert 'scsi: ufs: fix a missing check of devm_reset_control_get' (git-fixes).
• Revert 'x86/kvm: fix vcpu-id indexed array sizes' (git-fixes).
• rndis_host: set proper input size for OID_GEN_PHYSICAL_MEDIUM request (git-fixes).
• s390/dasd: fix use after free in dasd path handling (git-fixes).
• s390/pci: fix use after free of zpci_dev (git-fixes).
• s390/pci: fix zpci_zdev_put() on reserve (git-fixes).
• s390/qeth: fix deadlock during failing recovery (git-fixes).
• s390/qeth: Fix deadlock in remove_discipline (git-fixes).
• s390/qeth: fix NULL deref in qeth_clear_working_pool_list() (git-fixes).
• s390/topology: clear thread/group maps for offline cpus (git-fixes).
• scsi: be2iscsi: Fix an error handling path in beiscsi_dev_probe() (git-fixes).
• scsi: BusLogic: Fix missing pr_cont() use (git-fixes).
• scsi: core: Fix spelling in a source code comment (git-fixes).
• scsi: csiostor: Add module softdep on cxgb4 (git-fixes).
• scsi: csiostor: Uninitialized data in csio_ln_vnp_read_cbfn() (git-fixes).
• scsi: dc395: Fix error case unwinding (git-fixes).
• scsi: fdomain: Fix error return code in fdomain_probe() (git-fixes).
• scsi: FlashPoint: Rename si_flags field (git-fixes).
• scsi: iscsi: Fix iface sysfs attr detection (git-fixes).
• scsi: libsas: Use _safe() loop in sas_resume_port() (git-fixes).
• scsi: mpt3sas: Fix error return value in _scsih_expander_add() (git-fixes).
• scsi: qedf: Add pointer checks in qedf_update_link_speed() (git-fixes).
• scsi: qedf: Fix error codes in qedf_alloc_global_queues() (git-fixes).
• scsi: qedi: Fix error codes in qedi_alloc_global_queues() (git-fixes).
• scsi: qla2xxx: Fix a memory leak in an error path of qla2x00_process_els() (git-fixes).
• scsi: qla2xxx: Make sure that aborted commands are freed (git-fixes).
• scsi: smartpqi: Fix an error code in pqi_get_raid_map() (git-fixes).
• scsi: snic: Fix an error message (git-fixes).
• scsi: ufs-pci: Add quirk for broken auto-hibernate for Intel EHL (git-fixes).
• scsi: ufs: ufshcd-pltfrm: Fix memory leak due to probe defer (git-fixes).
• serial: 8250_dw: Drop wrong use of ACPI_PTR() (git-fixes).
• serial: xilinx_uartps: Fix race condition causing stuck TX (git-fixes).
• staging: r8712u: fix control-message timeout (git-fixes).
• staging: rtl8192u: fix control-message timeouts (git-fixes).
• stmmac: platform: Fix signedness bug in stmmac_probe_config_dt() (git-fixes).
• tracing: Increase PERF_MAX_TRACE_SIZE to handle Sentinel1 and docker together (bsc#1192745).
• Update config files: Add CONFIG_BPF_UNPRIV_DEFAULT_OFF is not set
• Update config files: pull BPF configs together
• usb: gadget: hid: fix error code in do_config() (git-fixes).
• USB: iowarrior: fix control-message timeouts (git-fixes).
• usb: max-3421: Use driver data instead of maintaining a list of bound devices (git-fixes).
• usb: musb: Balance list entry in musb_gadget_queue (git-fixes).
• USB: serial: keyspan: fix memleak on probe errors (git-fixes).
• video: fbdev: chipsfb: use memset_io() instead of memset() (git-fixes).
• x86/sme: Use #define USE_EARLY_PGTABLE_L5 in mem_encrypt_identity.c (bsc#1152489).
• x86/xen: Mark cpu_bringup_and_idle() as dead_end_function (git-fixes).
• xen-pciback: Fix return in pm_ctrl_init() (git-fixes).
• xen: Fix implicit type conversion (git-fixes).