# git rev-parse -q --verify 738a7832d21e3d911fcddab98ce260b79010b461^{commit}
738a7832d21e3d911fcddab98ce260b79010b461
already have revision, skipping fetch
# git checkout -q -f -B kisskb 738a7832d21e3d911fcddab98ce260b79010b461
# git clean -qxdf
# < git log -1
# commit 738a7832d21e3d911fcddab98ce260b79010b461
# Author: Christian Brauner <christian@brauner.io>
# Date:   Thu Apr 18 12:18:39 2019 +0200
# 
#     signal: use fdget() since we don't allow O_PATH
#     
#     As stated in the original commit for pidfd_send_signal() we don't allow
#     to signal processes through O_PATH file descriptors since it is
#     semantically equivalent to a write on the pidfd.
#     
#     We already correctly error out right now and return EBADF if an O_PATH
#     fd is passed.  This is because we use file->f_op to detect whether a
#     pidfd is passed and O_PATH fds have their file->f_op set to empty_fops
#     in do_dentry_open() and thus fail the test.
#     
#     Thus, there is no regression.  It's just semantically correct to use
#     fdget() and return an error right from there instead of taking a
#     reference and returning an error later.
#     
#     Signed-off-by: Christian Brauner <christian@brauner.io>
#     Acked-by: Oleg Nesterov <oleg@redhat.com>
#     Cc: Arnd Bergmann <arnd@arndb.de>
#     Cc: "Eric W. Biederman" <ebiederm@xmission.com>
#     Cc: Kees Cook <keescook@chromium.org>
#     Cc: Thomas Gleixner <tglx@linutronix.de>
#     Cc: Jann Horn <jann@thejh.net>
#     Cc: David Howells <dhowells@redhat.com>
#     Cc: "Michael Kerrisk (man-pages)" <mtk.manpages@gmail.com>
#     Cc: Andy Lutomirsky <luto@kernel.org>
#     Cc: Andrew Morton <akpm@linux-foundation.org>
#     Cc: Oleg Nesterov <oleg@redhat.com>
#     Cc: Aleksa Sarai <cyphar@cyphar.com>
#     Cc: Al Viro <viro@zeniv.linux.org.uk>
#     Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
# < /opt/cross/kisskb/korg/gcc-8.1.0-nolibc/aarch64-linux/bin/aarch64-linux-gcc --version
# < /opt/cross/kisskb/korg/gcc-8.1.0-nolibc/aarch64-linux/bin/aarch64-linux-ld --version
# < git log --format=%s --max-count=1 738a7832d21e3d911fcddab98ce260b79010b461
# < make -s -j 120 ARCH=arm64 O=/kisskb/build/linus-rand_arm64-randconfig_arm64-gcc8 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-8.1.0-nolibc/aarch64-linux/bin/aarch64-linux-  randconfig
KCONFIG_SEED=0xEC19618
# Added to kconfig CONFIG_PREVENT_FIRMWARE_BUILD=y
# yes \n | make -s -j 120 ARCH=arm64 O=/kisskb/build/linus-rand_arm64-randconfig_arm64-gcc8 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-8.1.0-nolibc/aarch64-linux/bin/aarch64-linux-  oldconfig
yes: standard output: Broken pipe
# make -s -j 120 ARCH=arm64 O=/kisskb/build/linus-rand_arm64-randconfig_arm64-gcc8 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-8.1.0-nolibc/aarch64-linux/bin/aarch64-linux-  
Completed OK
# rm -rf /kisskb/build/linus-rand_arm64-randconfig_arm64-gcc8
# Build took: 0:01:42.500264