# git rev-parse -q --verify 3950e975431bc914f7e81b8f2a2dbdf2064acb0f^{commit}
3950e975431bc914f7e81b8f2a2dbdf2064acb0f
already have revision, skipping fetch
# git checkout -q -f -B kisskb 3950e975431bc914f7e81b8f2a2dbdf2064acb0f
# git clean -qxdf
# < git log -1
# commit 3950e975431bc914f7e81b8f2a2dbdf2064acb0f
# Merge: fd76a74d940a 7fce69dff8db
# Author: Linus Torvalds <torvalds@linux-foundation.org>
# Date:   Tue Aug 4 14:27:25 2020 -0700
# 
#     Merge branch 'exec-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace
#     
#     Pull execve updates from Eric Biederman:
#      "During the development of v5.7 I ran into bugs and quality of
#       implementation issues related to exec that could not be easily fixed
#       because of the way exec is implemented. So I have been diggin into
#       exec and cleaning up what I can.
#     
#       This cycle I have been looking at different ideas and different
#       implementations to see what is possible to improve exec, and cleaning
#       the way exec interfaces with in kernel users. Only cleaning up the
#       interfaces of exec with rest of the kernel has managed to stabalize
#       and make it through review in time for v5.9-rc1 resulting in 2 sets of
#       changes this cycle.
#     
#        - Implement kernel_execve
#     
#        - Make the user mode driver code a better citizen
#     
#       With kernel_execve the code size got a little larger as the copying of
#       parameters from userspace and copying of parameters from userspace is
#       now separate. The good news is kernel threads no longer need to play
#       games with set_fs to use exec. Which when combined with the rest of
#       Christophs set_fs changes should security bugs with set_fs much more
#       difficult"
#     
#     * 'exec-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace: (23 commits)
#       exec: Implement kernel_execve
#       exec: Factor bprm_stack_limits out of prepare_arg_pages
#       exec: Factor bprm_execve out of do_execve_common
#       exec: Move bprm_mm_init into alloc_bprm
#       exec: Move initialization of bprm->filename into alloc_bprm
#       exec: Factor out alloc_bprm
#       exec: Remove unnecessary spaces from binfmts.h
#       umd: Stop using split_argv
#       umd: Remove exit_umh
#       bpfilter: Take advantage of the facilities of struct pid
#       exit: Factor thread_group_exited out of pidfd_poll
#       umd: Track user space drivers with struct pid
#       bpfilter: Move bpfilter_umh back into init data
#       exec: Remove do_execve_file
#       umh: Stop calling do_execve_file
#       umd: Transform fork_usermode_blob into fork_usermode_driver
#       umd: Rename umd_info.cmdline umd_info.driver_name
#       umd: For clarity rename umh_info umd_info
#       umh: Separate the user mode driver and the user mode helper support
#       umh: Remove call_usermodehelper_setup_file.
#       ...
# < /opt/cross/kisskb/fe-x86-64-core-i7-2017.05/bin/x86_64-linux-gcc --version
# < /opt/cross/kisskb/fe-x86-64-core-i7-2017.05/bin/x86_64-linux-ld --version
# < git log --format=%s --max-count=1 3950e975431bc914f7e81b8f2a2dbdf2064acb0f
# < make -s -j 24 ARCH=um O=/kisskb/build/linus_um-defconfig_um-x86_64 CROSS_COMPILE=/opt/cross/kisskb/fe-x86-64-core-i7-2017.05/bin/x86_64-linux- SUBARCH=x86_64 defconfig
# < make -s -j 24 ARCH=um O=/kisskb/build/linus_um-defconfig_um-x86_64 CROSS_COMPILE=/opt/cross/kisskb/fe-x86-64-core-i7-2017.05/bin/x86_64-linux- SUBARCH=x86_64 help
# make -s -j 24 ARCH=um O=/kisskb/build/linus_um-defconfig_um-x86_64 CROSS_COMPILE=/opt/cross/kisskb/fe-x86-64-core-i7-2017.05/bin/x86_64-linux- SUBARCH=x86_64 olddefconfig
# make -s -j 24 ARCH=um O=/kisskb/build/linus_um-defconfig_um-x86_64 CROSS_COMPILE=/opt/cross/kisskb/fe-x86-64-core-i7-2017.05/bin/x86_64-linux- SUBARCH=x86_64 
/kisskb/src/arch/um/os-Linux/signal.c: In function 'sig_handler_common':
/kisskb/src/arch/um/os-Linux/signal.c:51:1: warning: the frame size of 2960 bytes is larger than 1024 bytes [-Wframe-larger-than=]
 }
 ^
/kisskb/src/arch/um/os-Linux/signal.c: In function 'timer_real_alarm_handler':
/kisskb/src/arch/um/os-Linux/signal.c:95:1: warning: the frame size of 2960 bytes is larger than 1024 bytes [-Wframe-larger-than=]
 }
 ^
  LINK linux
Completed OK
# rm -rf /kisskb/build/linus_um-defconfig_um-x86_64
# Build took: 0:00:51.848768