# git rev-parse -q --verify 94f0b2d4a1d0c52035aef425da5e022bd2cb1c71^{commit}
94f0b2d4a1d0c52035aef425da5e022bd2cb1c71
already have revision, skipping fetch
# git checkout -q -f -B kisskb 94f0b2d4a1d0c52035aef425da5e022bd2cb1c71
# git clean -qxdf
# < git log -1
# commit 94f0b2d4a1d0c52035aef425da5e022bd2cb1c71
# Author: Linus Torvalds <torvalds@linux-foundation.org>
# Date:   Tue Jun 15 09:26:19 2021 -0700
# 
#     proc: only require mm_struct for writing
#     
#     Commit 591a22c14d3f ("proc: Track /proc/$pid/attr/ opener mm_struct") we
#     started using __mem_open() to track the mm_struct at open-time, so that
#     we could then check it for writes.
#     
#     But that also ended up making the permission checks at open time much
#     stricter - and not just for writes, but for reads too.  And that in turn
#     caused a regression for at least Fedora 29, where NIC interfaces fail to
#     start when using NetworkManager.
#     
#     Since only the write side wanted the mm_struct test, ignore any failures
#     by __mem_open() at open time, leaving reads unaffected.  The write()
#     time verification of the mm_struct pointer will then catch the failure
#     case because a NULL pointer will not match a valid 'current->mm'.
#     
#     Link: https://lore.kernel.org/netdev/YMjTlp2FSJYvoyFa@unreal/
#     Fixes: 591a22c14d3f ("proc: Track /proc/$pid/attr/ opener mm_struct")
#     Reported-and-tested-by: Leon Romanovsky <leon@kernel.org>
#     Cc: Kees Cook <keescook@chromium.org>
#     Cc: Christian Brauner <christian.brauner@ubuntu.com>
#     Cc: Andrea Righi <andrea.righi@canonical.com>
#     Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
# < /opt/cross/kisskb/korg/gcc-4.9.4-nolibc/sh4-linux/bin/sh4-linux-gcc --version
# < /opt/cross/kisskb/korg/gcc-4.9.4-nolibc/sh4-linux/bin/sh4-linux-ld --version
# < git log --format=%s --max-count=1 94f0b2d4a1d0c52035aef425da5e022bd2cb1c71
# < make -s -j 48 ARCH=sh O=/kisskb/build/linus_rsk7201_defconfig_sh4-gcc4.9 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-4.9.4-nolibc/sh4-linux/bin/sh4-linux-  rsk7201_defconfig
# < make -s -j 48 ARCH=sh O=/kisskb/build/linus_rsk7201_defconfig_sh4-gcc4.9 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-4.9.4-nolibc/sh4-linux/bin/sh4-linux-  help
# make -s -j 48 ARCH=sh O=/kisskb/build/linus_rsk7201_defconfig_sh4-gcc4.9 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-4.9.4-nolibc/sh4-linux/bin/sh4-linux-  olddefconfig
# make -s -j 48 ARCH=sh O=/kisskb/build/linus_rsk7201_defconfig_sh4-gcc4.9 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-4.9.4-nolibc/sh4-linux/bin/sh4-linux-  
  Generating include/generated/machtypes.h
<stdin>:1511:2: warning: #warning syscall clone3 not implemented [-Wcpp]
/kisskb/src/drivers/tty/serial/sh-sci.c: In function 'sci_remap_port':
/kisskb/src/drivers/tty/serial/sh-sci.c:2666:19: warning: unused variable 'sport' [-Wunused-variable]
  struct sci_port *sport = to_sci_port(port);
                   ^
Image Name:   Linux-5.13.0-rc6+
Created:      Wed Jun 16 06:37:01 2021
Image Type:   SuperH Linux Kernel Image (gzip compressed)
Data Size:    1712716 Bytes = 1672.57 KiB = 1.63 MiB
Load Address: 08001000
Entry Point:  08002000
  Image arch/sh/boot/uImage is ready
Completed OK
# rm -rf /kisskb/build/linus_rsk7201_defconfig_sh4-gcc4.9
# Build took: 0:00:25.381281