🛡️ openSUSE-SU-2021:3941-1 — dtb-aarch64 (CVE-2021-0941 +3 more)

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 f