Security update for the Linux Kernel (critical)

An update that solves 27 vulnerabilities and has 23 fixes
is now available.

Description:

The SUSE Linux Enterprise 15 SP1 LTSS kernel was updated to receive
various security and bugfixes.

The following security bugs were fixed:

• CVE-2022-0435: Fixed remote stack overflow in net/tipc module that
  validate domain record count on input (bsc#1195254).
• CVE-2022-0330: Fixed flush TLBs before releasing backing store
  (bsc#1194880).
• CVE-2021-45486: Fixed an information leak because the hash table is very
  small in net/ipv4/route.c (bnc#1194087).
• CVE-2021-45095: Fixed refcount leak in pep_sock_accept in
  net/phonet/pep.c (bnc#1193867).
• CVE-2021-44733: Fixed a use-after-free exists in drivers/tee/tee_shm.c
  in the TEE subsystem, that could have occured because of a race
  condition in tee_shm_get_from_id during an attempt to free a shared
  memory object (bnc#1193767).
• CVE-2021-43976: Fixed a flaw that could allow an attacker (who can
  connect a crafted USB device) to cause a denial of service. (bnc#1192847)
• CVE-2021-43975: Fixed a flaw in hw_atl_utils_fw_rpc_wait that could
  allow an attacker (who can introduce a crafted device) to trigger an
  out-of-bounds write via a crafted length value. (bsc#1192845)
• CVE-2021-4202: Fixed NFC race condition by adding NCI_UNREG flag
  (bsc#1194529).
• CVE-2021-4197: Use cgroup open-time credentials for process migraton
  perm checks (bsc#1194302).
• CVE-2021-4159: Fixed kernel ptr leak vulnerability via BPF in
  coerce_reg_to_size (bsc#1194227).
• CVE-2021-4149: Fixed btrfs unlock newly allocated extent buffer after
  error (bsc#1194001).
• CVE-2021-4135: Fixed zero-initialize memory inside netdevsim for new
  map’s value in function nsim_bpf_map_alloc (bsc#1193927).
• CVE-2021-4083: Fixed a read-after-free memory flaw inside the garbage
  collection for Unix domain socket file handlers when users call close()
  and fget() simultaneouslyand can potentially trigger a race condition
  (bnc#1193727).
• CVE-2021-4002: Fixed incorrect TLBs flush in hugetlbfs after
  huge_pmd_unshare (bsc#1192946).
• CVE-2021-39657: Fixed out of bounds read due to a missing bounds check
  in ufshcd_eh_device_reset_handler of ufshcd.c. This could lead to local
  information disclosure with System execution privileges needed
  (bnc#1193864).
• CVE-2021-39648: Fixed possible disclosure of kernel heap memory due to a
  race condition in gadget_dev_desc_UDC_show of configfs.c. This could
  lead to local information disclosure with System execution privileges
  needed. User interaction is not needed for exploitation (bnc#1193861).
• CVE-2021-3564: Fixed double-free memory corruption in the Linux kernel
  HCI device initialization subsystem that could have been used by
  attaching malicious HCI TTY Bluetooth devices. A local user could use
  this flaw to crash the system (bnc#1186207).
• CVE-2021-33098: Fixed a potential denial of service in Intel® Ethernet
  ixgbe driver due to improper input validation. (bsc#1192877)
• CVE-2021-28715: Fixed issue with xen/netback to do not queue unlimited
  number of packages (XSA-392) (bsc#1193442).
• CVE-2021-28714: Fixed issue with xen/netback to handle rx queue stall
  detection (XSA-392) (bsc#1193442).
• CVE-2021-28713: Fixed issue with xen/console to harden hvc_xen against
  event channel storms (XSA-391) (bsc#1193440).
• CVE-2021-28712: Fixed issue with xen/netfront to harden netfront against
  event channel storms (XSA-391) (bsc#1193440).
• CVE-2021-28711: Fixed issue with xen/blkfront to harden blkfront against
  event channel storms (XSA-391) (bsc#1193440).
• CVE-2021-0935: Fixed possible out of bounds write in ip6_xmit of
  ip6_output.c 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#1192032).
• CVE-2021-0920: Fixed a local privilege escalation due to an use after
  free bug in unix_gc (bsc#1193731).
• CVE-2020-27820: Fixed a vulnerability where a use-after-frees in
  nouveau’s postclose() handler could happen if removing device
  (bsc#1179599).
• CVE-2019-15126: Fixed a vulnerability in Broadcom and Cypress Wi-Fi
  chips, used in RPi family of devices aka “Kr00k”. (bsc#1167162)
• CVE-2018-25020: Fixed an overflow in the BPF subsystem due to a
  mishandling of a long jump over an instruction sequence where inner
  instructions require substantial expansions into multiple BPF
  instructions. This affects kernel/bpf/core.c and net/core/filter.c
  (bnc#1193575).

The following non-security bugs were fixed:

• Bluetooth: fix the erroneous flush_work() order (git-fixes).
• Build: Add obsolete_rebuilds_subpackage (boo#1172073 bsc#1191731).
• ICMPv6: Add ICMPv6 Parameter Problem, code 3 definition (bsc#1191241
  bsc#1195166).
• IPv6: reply ICMP error if the first fragment do not include all headers
  (bsc#1191241).
• elfcore: fix building with clang (bsc#1169514).
• hv_netvsc: Set needed_headroom according to VF (bsc#1193506).
• ipv6/netfilter: Discard first fragment not including all headers
  (bsc#1191241 bsc#1195166).
• kernel-*-subpackage: Add dependency on kernel scriptlets (bsc#1192740).
• kernel-binary.spec.in Stop templating the scriptlets for subpackages
  (bsc#1190358).
• kernel-binary.spec.in: add zstd to BuildRequires if used
• kernel-binary.spec.in: make sure zstd is supported by kmod if used
• kernel-binary.spec: Check for no kernel signing certificates. Also
  remove unused variable.
• kernel-binary.spec: Define $image as rpm macro (bsc#1189841).
• kernel-binary.spec: Do not fail silently when KMP is empty
  (bsc#1190358). Copy the code from kernel-module-subpackage that deals
  with empty KMPs.
• kernel-binary.spec: Do not sign kernel when no key provided
  (bsc#1187167).
• kernel-binary.spec: Fix kernel-default-base scriptlets after packaging
  merge.
• kernel-binary.spec: Require dwarves for kernel-binary-devel when BTF is
  enabled (jsc#SLE-17288).
• kernel-binary.spec: suse-kernel-rpm-scriptlets required for uninstall as
  well.
• kernel-cert-subpackage: Fix certificate location in scriptlets
  (bsc#1189841).
• kernel-source.spec: install-kernel-tools also required on 15.4
• kernel-spec-macros: Since rpm 4.17 %verbose is unusable (bsc#1191229).
  The semantic changed in an incompatible way so invoking the macro now
  causes a build failure.
• kprobes: Limit max data_size of the kretprobe instances (bsc#1193669).
• livepatch: Avoid CPU hogging with cond_resched (bsc#1071995).
• memstick: rtsx_usb_ms: fix UAF (bsc#1194516).
• moxart: fix potential use-after-free on remove path (bsc#1194516).
• net, xdp: Introduce xdp_init_buff utility routine (bsc#1193506).
• net, xdp: Introduce xdp_prepare_buff utility routine (bsc#1193506).
• net: Using proper atomic helper (bsc#1186222).
• net: ipv6: Discard next-hop MTU less than minimum link MTU (bsc#1191241).
• net: mana: Add RX fencing (bsc#1193506).
• net: mana: Add XDP support (bsc#1193506).
• net: mana: Allow setting the number of queues while the NIC is down
  (bsc#1193506).
• net: mana: Fix spelling mistake “calledd” -> “called” (bsc#1193506).
• net: mana: Fix the netdev_err()'s vPort argument in mana_init_port()
  (bsc#1193506).
• net: mana: Improve the HWC error handling (bsc#1193506).
• net: mana: Support hibernation and kexec (bsc#1193506).
• net: mana: Use kcalloc() instead of kzalloc() (bsc#1193506).
• objtool: Support Clang non-section symbols in ORC generation
  (bsc#1169514).
• post.sh: detect /usr mountpoint too
• recordmcount.pl: fix typo in s390 mcount regex (bsc#1192267).
• recordmcount.pl: look for jgnop instruction as well as bcrl on s390
  (bsc#1192267).
• rpm/kernel-binary.spec.in: Use kmod-zstd provide. This makes it possible
  to use kmod with ZSTD support on non-Tumbleweed.
• rpm/kernel-binary.spec.in: avoid conflicting suse-release suse-release
  had arbitrary values in staging, we can’t use it for dependencies. The
  filesystem one has to be enough (boo#1184804).
• rpm/kernel-binary.spec.in: do not strip vmlinux again (bsc#1193306).
• rpm/kernel-binary.spec: Use only non-empty certificates.
• rpm/kernel-obs-build.spec.in: make builds reproducible (bsc#1189305).
• rpm/kernel-source.rpmlintrc: ignore new include/config files.
• rpm/kernel-source.spec.in: do some more for vanilla_only.
• rpm: Abolish image suffix (bsc#1189841).
• rpm: Abolish scritplet templating (bsc#1189841). Outsource kernel-binary
  and KMP scriptlets to suse-module-tools.
• rpm: Define $certs as rpm macro (bsc#1189841).
• rpm: Fold kernel-devel and kernel-source scriptlets into spec files
  (bsc#1189841).
• rpm: fix kmp install path
• rpm: use _rpmmacrodir (boo#1191384)
• tty: hvc: replace BUG_ON() with negative return value.
• vfs: check fd has read access in kernel_read_file_from_fd()
  (bsc#1194888).
• x86/xen: Mark cpu_bringup_and_idle() as dead_end_function (bsc#1169514).
• xen/blkfront: do not take local copy of a request from the ring page
  (git-fixes).
• xen/blkfront: do not trust the backend response data blindly (git-fixes).
• xen/blkfront: read response from backend only once (git-fixes).
• xen/netfront: disentangle tx_skb_freelist (git-fixes).
• xen/netfront: do not read data from request on the ring page (git-fixes).
• xen/netfront: do not trust the backend response data blindly (git-fixes).
• xen/netfront: read response from backend only once (git-fixes).
• xen: sync include/xen/interface/io/ring.h with Xen’s newest version
  (git-fixes).
• xfrm: fix MTU regression (bsc#1185377, bsc#1194048).

Special Instructions and Notes:

Please reboot the system after installing this update.

Patch Instructions:

To install this openSUSE Security Update use the SUSE recommended installation methods
like YaST online_update or “zypper patch”.

Alternatively you can run the command listed for your product:

• openSUSE Leap 15.4:

  zypper in -t patch openSUSE-SLE-15.4-2022-366=1

• openSUSE Leap 15.3:

  zypper in -t patch openSUSE-SLE-15.3-2022-366=1