Security update for the Linux Kernel

The SUSE Linux Enterprise 15 SP1 kernel was updated receive various security and bugfixes. The following security bugs were fixed: - CVE-2021-26930: Fixed an improper error handling in blkback's grant mapping (XSA-365 bsc#1181843). - CVE-2021-26931: Fixed an issue where Linux kernel was treating grant mapping errors as bugs (XSA-362 bsc#1181753). - CVE-2021-26932: Fixed improper error handling issues in Linux grant mapping (XSA-361 bsc#1181747). by remote attackers to read or write files via directory traversal in an XCOPY request (bsc#178372). - CVE-2020-29368,CVE-2020-29374: Fixed an issue in copy-on-write implementation which could have granted unintended write access because of a race condition in a THP mapcount check (bsc#1179660, bsc#1179428). The following non-security bugs were fixed: - btrfs: Cleanup try_flush_qgroup (bsc#1182047). - btrfs: Do not flush from btrfs_delayed_inode_reserve_metadata (bsc#1182047). - btrfs: fix data bytes_may_use underflow with fallocate due to failed quota reserve (bsc#1182130) - btrfs: Free correct amount of space in btrfs_delayed_inode_reserve_metadata (bsc#1182047). - btrfs: Remove btrfs_inode from btrfs_delayed_inode_reserve_metadata (bsc#1182047). - btrfs: Simplify code flow in btrfs_delayed_inode_reserve_metadata (bsc#1182047). - btrfs: Unlock extents in btrfs_zero_range in case of errors (bsc#1182047). - Drivers: hv: vmbus: Avoid use-after-free in vmbus_onoffer_rescind() (git-fixes). - ibmvnic: fix a race between open and reset (bsc#1176855 ltc#187293). - kernel-binary.spec: Add back initrd and image symlink ghosts to filelist (bsc#1182140). Fixes: 76a9256314c3 ('rpm/kernel-{source,binary}.spec: do not include ghost symlinks (boo#1179082).') - libnvdimm/dimm: Avoid race between probe and available_slots_show() (bsc#1170442). - net: bcmgenet: add support for ethtool rxnfc flows (git-fixes). - net: bcmgenet: code movement (git-fixes). - net: bcmgenet: fix mask check in bcmgenet_validate_flow() (git-fixes). - net: bcmgenet: Fix WoL with password after deep sleep (git-fixes). - net: bcmgenet: re-remove bcmgenet_hfb_add_filter (git-fixes). - net: bcmgenet: set Rx mode before starting netif (git-fixes). - net: bcmgenet: use __be16 for htons(ETH_P_IP) (git-fixes). - net: bcmgenet: Use correct I/O accessors (git-fixes). - net: lpc-enet: fix error return code in lpc_mii_init() (git-fixes). - net/mlx4_en: Handle TX error CQE (bsc#1181854). - net: moxa: Fix a potential double 'free_irq()' (git-fixes). - net: sun: fix missing release regions in cas_init_one() (git-fixes). - nvme-multipath: Early exit if no path is available (bsc#1180964). - rpm/post.sh: Avoid purge-kernel for the first installed kernel (bsc#1180058) - scsi: target: fix unmap_zeroes_data boolean initialisation (bsc#1163617). - usb: dwc2: Abort transaction after errors with unknown reason (bsc#1180262). - usb: dwc2: Do not update data length if it is 0 on inbound transfers (bsc#1180262). - usb: dwc2: Make 'trimming xfer length' a debug message (bsc#1180262). - vmxnet3: Remove buf_info from device accessible structures (bsc#1181671). - xen/netback: avoid race in xenvif_rx_ring_slots_available() (bsc#1065600). - xen/netback: fix spurious event detection for common event case (bsc#1182175).