Security update for the Linux Kernel

The SUSE Linux Enterprise 11 SP4 kernel was updated to receive various security and bugfixes. The following security bugs were fixed: - CVE-2023-3268: Fixed an out of bounds memory access flaw in relay_file_read_start_pos in the relayfs (bsc#1212502). - CVE-2023-3776: Fixed improper refcount update in cls_fw leads to use-after-free (bsc#1213588). - CVE-2022-40982: Fixed transient execution attack called 'Gather Data Sampling' (bsc#1206418). - CVE-2023-3567: Fixed a use-after-free in vcs_read in drivers/tty/vt/vc_screen.c (bsc#1213167). - CVE-2023-0459: Fixed information leak in __uaccess_begin_nospec (bsc#1211738). - CVE-2023-20593: Fixed a ZenBleed issue in 'Zen 2' CPUs that could allow an attacker to potentially access sensitive information (bsc#1213286). - CVE-2018-3639: Fixed Speculative Store Bypass aka 'Memory Disambiguation' (bsc#1087082). - CVE-2017-18344: Fixed an OOB access led by an invalid check in timer_create. (bsc#1102851). - CVE-2022-45919: Fixed a use-after-free in dvb_ca_en50221.c that could occur if there is a disconnect after an open, because of the lack of a wait_event (bsc#1205803). - CVE-2023-35824: Fixed a use-after-free in dm1105_remove in drivers/media/pci/dm1105/dm1105.c (bsc#1212501). - CVE-2023-3161: Fixed shift-out-of-bounds in fbcon_set_font() (bsc#1212154). - CVE-2023-3141: Fixed a use-after-free flaw in r592_remove in drivers/memstick/host/r592.c, that allowed local attackers to crash the system at device disconnect (bsc#1212129). - CVE-2023-3159: Fixed use-after-free issue in driver/firewire in outbound_phy_packet_callback (bsc#1212128). The following non-security bugs were fixed: - fbcon: Check font dimension limits (CVE-2023-3161 bsc#1212154). - firewire: fix potential uaf in outbound_phy_packet_callback() (CVE-2023-3159 bsc#1212128). - kABI: restore _copy_from_user on x86_64 and copy_to_user on x86 (bsc#1211738 CVE-2023-0459). - media: dm1105: Fix use after free bug in dm1105_remove due to race condition (bsc#1212501 CVE-2023-35824). - media: dvb-core: Fix use-after-free due to race condition at dvb_ca_en50221 (CVE-2022-45919 bsc#1205803). - memstick: r592: Fix UAF bug in r592_remove due to race condition (CVE-2023-3141 bsc#1212129 bsc#1211449). - net/sched: cls_fw: Fix improper refcount update leads to use-after-free (CVE-2023-3776 bsc#1213588). - pkt_sched: fix error return code in fw_change_attrs() (bsc#1213588). - pkt_sched: fix error return code in fw_change_attrs() (bsc#1213588). - posix-timer: Properly check sigevent->sigev_notify (CVE-2017-18344, bsc#1102851, bsc#1208715). - relayfs: fix out-of-bounds access in relay_file_read (bsc#1212502 CVE-2023-3268). - uaccess: Add speculation barrier to copy_from_user() (bsc#1211738 CVE-2023-0459). - vc_screen: don't clobber return value in vcs_read (bsc#1213167 CVE-2023-3567). - vc_screen: modify vcs_size() handling in vcs_read() (bsc#1213167 CVE-2023-3567). - vc_screen: move load of struct vc_data pointer in vcs_read() to avoid UAF (bsc#1213167 CVE-2023-3567). - x86: Unify copy_from_user() size checking (bsc#1211738 CVE-2023-0459). - x86/copy_user: Unify the code by removing the 64-bit asm _copy_*_user() variants (bsc#1211738 CVE-2023-0459). - x86/cpu/amd: Add a Zenbleed fix (bsc#1213286, CVE-2023-20593). - x86/speculation: Add Gather Data Sampling mitigation (bsc#1206418, CVE-2022-40982).