Fedora 34: FEDORA-2021-41fb54ae9f Critical: Kernel DoS & Leak Fixes

The kernel meta package

The 5.11.11 stable kernel update contains a number of important fixes across the

tree.

* Tue Mar 30 2021 Justin M. Forbes [5.11.11-300]

- Set CONFIG_XEN_MEMORY_HOTPLUG_LIMIT as required by 5.11.11 (Justin M. Forbes)

* Tue Mar 30 2021 Justin M. Forbes [5.11.11-13]

- drm/i915: Disable LTTPR support when the DPCD rev < 1.4 (Imre Deak)

- drm/i915/dp: Prevent setting the LTTPR LT mode if no LTTPRs are detected (Imre Deak)

- drm/i915/ilk-glk: Fix link training on links with LTTPRs (Imre Deak)

- redhat/mod-blacklist.sh: Fix floppy blacklisting (Hans de Goede)

[ 1 ] Bug #1945345 - CVE-2021-29646 kernel: improper input validation in tipc_nl_retrieve_key function in net/tipc/node.c

https://bugzilla.redhat.com/show_bug.cgi?id=1945345

[ 2 ] Bug #1945361 - CVE-2021-29647 kernel: information disclosure due to uninitialized data structure in qrtr_recvmsg function in net/qrtr/qrtr.c

https://bugzilla.redhat.com/show_bug.cgi?id=1945361

[ 3 ] Bug #1945373 - CVE-2021-29648 kernel: DoS due to BPF subsystem does not properly consider that resolved_ids and resolved_sizes are intentionally uninitialized in the vmlinux BPF

https://bugzilla.redhat.com/show_bug.cgi?id=1945373

[ 4 ] Bug #1945379 - CVE-2021-29649 kernel: memory leak in user mode driver due to lack of cleanup steps in kernel/usermode_driver.c and kernel/bpf/preload/bpf_preload_kern.c

https://bugzilla.redhat.com/show_bug.cgi?id=1945379

[ 5 ] Bug #1945388 - CVE-2021-29650 kernel: lack a full memory barrier upon the assignment of a new table value in net/netfilter/x_tables.c and include/linux/netfilter/x_tables.h may lead to DoS

https://bugzilla.redhat.com/show_bug.cgi?id=1945388

su -c 'dnf upgrade --advisory FEDORA-2021-41fb54ae9f' at the command

line. For more information, refer to the dnf documentation available at

https://dnf.readthedocs.io/en/latest/command_ref.html

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