# git rev-parse -q --verify aefcf2f4b58155d27340ba5f9ddbe9513da8286d^{commit} aefcf2f4b58155d27340ba5f9ddbe9513da8286d already have revision, skipping fetch # git checkout -q -f -B kisskb aefcf2f4b58155d27340ba5f9ddbe9513da8286d # git clean -qxdf # < git log -1 # commit aefcf2f4b58155d27340ba5f9ddbe9513da8286d # Merge: f1f2f614d535 45893a0abee6 # Author: Linus Torvalds # Date: Sat Sep 28 08:14:15 2019 -0700 # # Merge branch 'next-lockdown' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security # # Pull kernel lockdown mode from James Morris: # "This is the latest iteration of the kernel lockdown patchset, from # Matthew Garrett, David Howells and others. # # From the original description: # # This patchset introduces an optional kernel lockdown feature, # intended to strengthen the boundary between UID 0 and the kernel. # When enabled, various pieces of kernel functionality are restricted. # Applications that rely on low-level access to either hardware or the # kernel may cease working as a result - therefore this should not be # enabled without appropriate evaluation beforehand. # # The majority of mainstream distributions have been carrying variants # of this patchset for many years now, so there's value in providing a # doesn't meet every distribution requirement, but gets us much closer # to not requiring external patches. # # There are two major changes since this was last proposed for mainline: # # - Separating lockdown from EFI secure boot. Background discussion is # covered here: https://lwn.net/Articles/751061/ # # - Implementation as an LSM, with a default stackable lockdown LSM # module. This allows the lockdown feature to be policy-driven, # rather than encoding an implicit policy within the mechanism. # # The new locked_down LSM hook is provided to allow LSMs to make a # policy decision around whether kernel functionality that would allow # tampering with or examining the runtime state of the kernel should be # permitted. # # The included lockdown LSM provides an implementation with a simple # policy intended for general purpose use. This policy provides a coarse # level of granularity, controllable via the kernel command line: # # lockdown={integrity|confidentiality} # # Enable the kernel lockdown feature. If set to integrity, kernel features # that allow userland to modify the running kernel are disabled. If set to # confidentiality, kernel features that allow userland to extract # confidential information from the kernel are also disabled. # # This may also be controlled via /sys/kernel/security/lockdown and # overriden by kernel configuration. # # New or existing LSMs may implement finer-grained controls of the # lockdown features. Refer to the lockdown_reason documentation in # include/linux/security.h for details. # # The lockdown feature has had signficant design feedback and review # across many subsystems. This code has been in linux-next for some # weeks, with a few fixes applied along the way. # # Stephen Rothwell noted that commit 9d1f8be5cf42 ("bpf: Restrict bpf # when kernel lockdown is in confidentiality mode") is missing a # Signed-off-by from its author. Matthew responded that he is providing # this under category (c) of the DCO" # # * 'next-lockdown' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security: (31 commits) # kexec: Fix file verification on S390 # security: constify some arrays in lockdown LSM # lockdown: Print current->comm in restriction messages # efi: Restrict efivar_ssdt_load when the kernel is locked down # tracefs: Restrict tracefs when the kernel is locked down # debugfs: Restrict debugfs when the kernel is locked down # kexec: Allow kexec_file() with appropriate IMA policy when locked down # lockdown: Lock down perf when in confidentiality mode # bpf: Restrict bpf when kernel lockdown is in confidentiality mode # lockdown: Lock down tracing and perf kprobes when in confidentiality mode # lockdown: Lock down /proc/kcore # x86/mmiotrace: Lock down the testmmiotrace module # lockdown: Lock down module params that specify hardware parameters (eg. ioport) # lockdown: Lock down TIOCSSERIAL # lockdown: Prohibit PCMCIA CIS storage when the kernel is locked down # acpi: Disable ACPI table override if the kernel is locked down # acpi: Ignore acpi_rsdp kernel param when the kernel has been locked down # ACPI: Limit access to custom_method when the kernel is locked down # x86/msr: Restrict MSR access when the kernel is locked down # x86: Lock down IO port access when the kernel is locked down # ... # < /opt/cross/kisskb/gcc-4.6.3-nolibc/m68k-linux/bin/m68k-linux-gcc --version # < /opt/cross/kisskb/gcc-4.6.3-nolibc/m68k-linux/bin/m68k-linux-ld --version # < git log --format=%s --max-count=1 aefcf2f4b58155d27340ba5f9ddbe9513da8286d # < make -s -j 48 ARCH=m68k O=/kisskb/build/linus_sun3_defconfig_m68k CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/m68k-linux/bin/m68k-linux- sun3_defconfig WARNING: unmet direct dependencies detected for NEED_MULTIPLE_NODES Depends on [n]: DISCONTIGMEM [=n] || NUMA Selected by [y]: - SINGLE_MEMORY_CHUNK [=y] && MMU [=y] WARNING: unmet direct dependencies detected for NEED_MULTIPLE_NODES Depends on [n]: DISCONTIGMEM [=n] || NUMA Selected by [y]: - SINGLE_MEMORY_CHUNK [=y] && MMU [=y] # make -s -j 48 ARCH=m68k O=/kisskb/build/linus_sun3_defconfig_m68k CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/m68k-linux/bin/m68k-linux- :1511:2: warning: #warning syscall clone3 not implemented [-Wcpp] /kisskb/src/kernel/printk/printk.c: In function 'devkmsg_sysctl_set_loglvl': /kisskb/src/kernel/printk/printk.c:204:16: warning: 'old' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/ipc/shm.c: In function 'ksys_shmdt': /kisskb/src/ipc/shm.c:1712:59: warning: 'file' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/lib/mpi/mpicoder.c: In function 'mpi_read_raw_from_sgl': /kisskb/src/lib/mpi/mpicoder.c:336:12: warning: 'buff' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/kernel/acct.c: In function 'acct_pin_kill': /kisskb/src/kernel/acct.c:177:2: warning: value computed is not used [-Wunused-value] /kisskb/src/drivers/net/ethernet/i825xx/sun3_82586.c: In function 'sun3_82586_timeout': /kisskb/src/drivers/net/ethernet/i825xx/sun3_82586.c:993:89: warning: array subscript is above array bounds [-Warray-bounds] /kisskb/src/net/core/gen_stats.c: In function '__gnet_stats_copy_basic': /kisskb/src/net/core/gen_stats.c:157:19: warning: 'seq' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/drivers/md/raid10.c: In function 'read_balance': /kisskb/src/drivers/md/raid10.c:842:22: warning: 'best_pending_slot' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/drivers/net/macsec.c: In function 'macsec_del_txsa': /kisskb/src/drivers/net/macsec.c:1995:2: warning: 'assoc_num' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/drivers/net/macsec.c:1995:2: warning: 'tx_sc' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/drivers/net/macsec.c: In function 'macsec_upd_txsa': /kisskb/src/drivers/net/macsec.c:2060:5: warning: 'assoc_num' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/drivers/net/macsec.c:2060:24: warning: 'tx_sc' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/drivers/net/macsec.c:2061:21: warning: 'secy' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/drivers/net/macsec.c: In function 'macsec_del_rxsa': /kisskb/src/drivers/net/macsec.c:1918:2: warning: 'assoc_num' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/drivers/net/macsec.c:1918:2: warning: 'rx_sc' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/drivers/net/tun.c: In function 'tun_get_user': /kisskb/src/drivers/net/tun.c:1836:30: warning: 'copylen' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/drivers/net/tun.c:1526:31: warning: 'linear' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/drivers/net/tun.c:1749:46: note: 'linear' was declared here /kisskb/src/net/core/dev.c: In function 'validate_xmit_skb_list': /kisskb/src/net/core/dev.c:3407:15: warning: 'tail' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/lib/rhashtable.c: In function 'rht_deferred_worker': /kisskb/src/include/linux/rhashtable.h:110:10: warning: 'next' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/lib/rhashtable.c:222:28: note: 'next' was declared here /kisskb/src/fs/cifs/smb2pdu.c: In function 'SMB2_ioctl_init': /kisskb/src/fs/cifs/smb2pdu.c:2682:19: warning: 'in_data_buf' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/fs/proc/inode.c: In function 'proc_reg_open': /kisskb/src/include/linux/list.h:65:12: warning: 'pdeo' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/fs/proc/inode.c:338:21: note: 'pdeo' was declared here /kisskb/src/net/core/filter.c: In function 'bpf_clear_redirect_map': /kisskb/src/net/core/filter.c:3603:4: warning: value computed is not used [-Wunused-value] /kisskb/src/fs/ocfs2/alloc.c: In function 'ocfs2_trim_mainbm': /kisskb/src/fs/ocfs2/alloc.c:7608:17: warning: 'first_bit' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/fs/udf/unicode.c: In function 'udf_name_conv_char': /kisskb/src/fs/udf/unicode.c:132:8: warning: 'c' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/fs/ocfs2/file.c: In function 'ocfs2_file_write_iter': /kisskb/src/fs/ocfs2/file.c:2373:3: warning: value computed is not used [-Wunused-value] /kisskb/src/net/sctp/output.c: In function 'sctp_packet_config': /kisskb/src/include/net/sock.h:1960:19: warning: 'sk' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/net/sctp/output.c:79:15: note: 'sk' was declared here /kisskb/src/fs/posix_acl.c: In function 'get_acl': /kisskb/src/fs/posix_acl.c:148:3: warning: value computed is not used [-Wunused-value] /kisskb/src/drivers/md/dm-writecache.c: In function 'writecache_writeback': /kisskb/src/drivers/md/dm-writecache.c:1613:18: warning: 'g' may be used uninitialized in this function [-Wuninitialized] Completed OK # rm -rf /kisskb/build/linus_sun3_defconfig_m68k # Build took: 0:01:14.668699